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好棒哦! 羡慕您有自己的天文台，這也是大家的夢想............

好棒喔! 純手工打造的耶

簡單又不超出建築物太多~~
與屋頂周圍現況融合~~這是個很棒的成品

可在屋頂嘗試~~

有夢  很好

能實現自家有天文台 --> 無價 ..

恭喜  又有同好蓋天文台了 .

好酷哦.... ;D

屋頂洞人 ;D
能夠完成自己的夢
真好

像這樣小巧的
我們也可以自己試試看

不一定要圓頂
方頂、平頂
都可以想想看

我最喜歡她的圓頂
有夠絕
好像..................... ;D

垃圾桶   XD

真的很強!!!!!厲害~~~~~~~

近日又要开始花心思搞设备上的事了,要开始改用赤道仪EQ3。
想到设备，天文台的正式使用也快有半年了，也是时候总结一下这个天文台的功效了。实际使用上到底和当初未做时的设想，到目前为止到底有几大的出入呢 ？

1. 要能白天在里面做事，看书，上网打机，休息和睡觉，而不感到闷热。
这点基本上每个周末都试过的，睡午觉更加是最常有的。目前为止我只感到很阴凉,因为门口设在正南，把盖往北方开便自然有风抽进来。门口是设对的，加上墙身用砖做，最能隔热不过的，还铺了特殊白色的航空隔热涂料，我相信就算夏天温度比现在再高十几度都问题不大。
应当也和现在一样的凉快才是。

2. 要同时能容纳4个人，这点也没问题。

3. 天文方面：
a）徳式赤道仪能用，手动型的目前更加合适以及附合实际的需要和获得真正的观星乐趣。空间方面也不觉有什么难用，连现在加添了不小大型家具也影响不大，也许个人身型的关系吧, 看星时自己感觉也挺舒适自在的，特别那个高底凳是个非常好用，靠它能长时间看不觉疲倦，此为第一重要的用具。因此天文台的大小是合适的，当初也是附合实际情况的大小设计。

b) 望远镜的大小，我现在可以有信心说一点，比现在大一倍有多（10“）的牛反镜子也能用，而且还会更加好用，只要镜身长度最好不超出95cm可以了。其它类型的镜，張来如有实际需要，添置大点的镜也无防，实际用镜时，还有很多余地可言的，不是单单靠想像或者简单的计算便能判断是大是小的，实际用时，根本也没那么单纯能想像计算得知空间利用方面的，只要长期用了便不会感到有什么大问题。

c) 唯一一点美中不足的是无法用极轴镜直接对北极星，因为极轴底位置被墙身挡住了，不过还有其它做法的。一个是主镜对北极星极,以调节极轴,因为主镜和赤道仪的极轴实际上也是平行的，而且必需得平行。因此用那个来对北极星，都会是一样 ,如果主镜和极轴不平行，那么本身也就不平行，即使极轴对好北极星，主镜不平行也同样没用，实际上是一体的。用主镜更加附合实践情况，因为北极星于本地的天气也不是那么容易能透过一般的极轴镜看到的。
其二方法会是用drifting , 这个方法可行性都挺高的。

4) 在天文台的设备贮藏方面，这点毫无疑问是做到了，而且还加添了一个大贮柜，足够收藏用具了。

5) 美观方面, 大方得体,溶合周边环境。

以八个字总结：合到好处，考虑全面

MANDII
2010/03/23

极轴镜直接对北极星，因为极轴底位置被墙身挡住了
--> 牆壁  鑽洞

洗個洞  應該不會破壞牆壁

對拉 圓頂可以放多大望遠鏡 ?

厲害
敢問相關的準備器材清單與費用

謝謝賜教先

好可愛的天文台 ;D

呵呵,洗個洞目前来说工程比较大,不想费劲搞。
再一个也没必要那样对极，我目前用EQ3跟踪，单片3分钟不拉线,拍一般的深空还是够用的。目前用的是MIZAR 4“牛反，本月已购置了6" ORION 牛反计划半年后使用。以牛反来说，10”在使用上估计问题也不会太大的，总的看你是怎么用而已。我并不喜欢用GOTO，我喜欢人工用天体的时角来找星。

从第一天设计该天文台的时，我已定位于搞底成本的天体（深空）拍照记录，未必就是天文摄影的。天文设备来说，到目前为止，2倍望洋镜，一部双筒，EQ3和EM8赤道仪，DSI I ，DC仔和一些目镜，全部以二手价购入，还不到3000港币。
天文台的功效以及天文爱好的成效，都不是现在做好了才那么说的，你如果到我们论坛看看当初的文章，全部都有字有根据的。早已定下来的方向和定位目标，目前只是按该目标一步步进展的。  

这里有星期四 03 九月, 2009 16:53的记录，那是开始时的计划费用，后来也就多出了几百吧。
但时间能及时在10月31日搞定，哈哈！

Purpose :

- To make an obseravtory room on the home platform for storage of all the atronomy equipments ( Telescope & moult , networked PC , cameras and other auxillaries )
- To observe the sky at night .
- To provide a small reading room and room to make plastic models on day time .
- The room should be large enough to sit for at least two persons .( No need for standing inside )
- The room is heat insulated in day time and highly water proof .
with strong wind substantion .

Components :
波离钢 halfly-opened Dome , iron circular railway , aluminium door and red-block circula building wall .

Method :
Self Design
Dome , iron railway , aluminum door 订造 in shenzhen .
The red-block wall is made by own in HK .

Total cost : 2200 RMB ( Dome)
2500 RMB ( iron circular railway)
600 RMB ( aluminum Door )
600 RMB ( white heat insulation painting )
800 HKD ( transport SZ->HK)
500 HKD ( cicular wall cement )
Total : 8000 HKD


Target finish date : october 2009

我玩天问也半年有多了，天文台什么时候建，我就什么时候开始玩天文，可能会提早3个月吧。
刚好，我作晚拍了一幅M13，给大家看看。
不是非常的好看。。。 但我是进力了。

令人感動的天文夢!!!與天文台!!!

M64 at 2010/07/01

今晚是找到M64了,但无法拍下来,因望洋镜和DSI I 不够感应.只能拍下附近俩度范围内的天区作记录了.
我能确认找到是基于以下沿因:
1. 一开始用时角直指到大概在位置'红十字'那里,往目镜里看什么都没有.无法确认下于是乎我便打印以下的星图出来.
2. 图中圆圈是我用的K25mm 目镜视场大小.我沿黄色路线从上往下走,走到红圈那里便停.
3. 然后往右走便是M64的位置了.沿路很清楚能看到路线上的星,暗的有10等都看到.
4. 找到M64的位置后我在目镜里是看不到它的,然后马上放上DSI , 拍3分钟单片,没东西拍到. 2分钟,1分钟和4分钟都试了也没东西,放弃下只能跑回红圈那颗明亮的星那里拍一张也就结束了.




由4次的实践可以看出以下的来。

第1次 用时角(人肉ＧＯＴＯ）立即在目镜里看到M42，DSI拍到。
第2次 用时角找M101星系(magitude 7.X) ，K25mm目镜看不到，PC屏幕上星图无法与 目镜里的星点进行star hooking 对照,DSI也拍不到。
第3次 用时角立即在K25mm目镜里马上看到M13，DSI拍到。
第4次 用时角找到M64星系(magitude 8.X) ，K25mm 目镜看不到，打印星图可以与目镜里的星点进行star hooking 对照,非常方便，DSI拍不到。


1.用时角可以非常快找到DSO，准确度在2度范围，赤道仪的最小单位也是一格2度和10min，K25mm 的在600mm下视场约1.8度范围,
因此赤道仪一格之内的误差是很容易在K25mm下也能找到的。
2. 时角找到该DSO , 目镜里看到,便马上可以拍照,而且必然会拍到。
时角找到该DSO，目镜里看不到该DSO，便以打印星图作附近星点的star hooking 来确认位置。
位置确认好了便试下拍，拍到拍不到视乎望洋镜和DSI I 在当时天空下的整体感光度了。
3. 放大多一倍，光度暗4倍。K25mm 是24倍， DSI I 约7mm/8mm focal length , 放大可能在75倍那样。
那么，估计DSI拍照时的光度是目视里的1/9,但毕竟DSI是机器，因此它要比人眼感光强好多才是。
因此都很难说拍不拍得到。
4. 能看到必然拍得到,看不到或许拍得到。那么望洋镜便会是主要因素。

用时角可以非常快找到DSO，准确度在2度范围...................
這方法確實是最有效率的
搭上數位相機CCD的敏感度修正
人肉導星也是很快的
文字個人經驗值分享很受益
 :-*

作晚的M57，目镜里看不到，但能拍得到！ :)
打印星图确认位置后便发炮打下来！
下次单片要再暴光多点（1min)

打印出来的星图。
予先做好。用时和红光电筒一起用来对目镜里的星。

第一次拍有這樣的水準，很厲害了..^^

哈哈! 有拍下來就是成績啦!

初玩天文能弄個天文台就夠令人羨慕了

別讓好壞影響興緻

等心越來越大的時候，要不要升級再說....

給你拍拍手
給你放煙火 ;D

我們這些只會花錢蓋天文台.是有點汗顏ㄚ...

香港睛天毕竟不多,能看星的夜晚小之又小。
个人也不想花太多精神于器材方面的认识和提升，
在这样的环境下和前体下,有必要想想如何利用手上现有的整套天文望远镜设备，来做一些自己想做的事情 。有必要发掘一些能把设备用于日间的用途。当然天文嗜好还是为主，只是加插多一个玩法。

现有一构思，用望远镜来搜索山上的果实,鸟巢 ,密蜂巢等等，或者观察奇花异草。搜索和观察必需带有重复性，随时间的推移能找回同一个目标以观察其在该时间内的变化。

具体做法：
- 简单有效的拍照和记录，用DC比较好，能和目镜一样的视场。
- 放大10倍到150倍已足够观察。利用不同的目镜来作地毯式搜索。
- 目标的位置必需要能记录，比如利用赤道仪的刻度，或者把赤道仪改成经维仪。

此文件将会随时间更新更进内容，以作记录。

MANDII
2010/01/12



一个星期以来的试验，证明当初的构思可行。MIZAR天文望远镜和DSI/DC可以用来观察和拍摄山上同一棵的植物的生长状况，重点意义在于开拓天望的新应用领域,使整套设备有了立脚点，不致于高不成，底不就，没有实质作用的局面。
可以说对日后[意义深厚，影响深远]。因为需知道玩天体毕竟是比较”车此“的嗜好来的，有时更加是一可遇不可球的事情。

用DSI来拍摄比DC要理想，视场刚刚好，不大不小，最明显的便是它可以夜间观察，夜间无论景物有多暗，DSI都足以应付。而且DC在视场达到半度的高放大倍数下就算是白天也无发拍得好的。另一方面赤道仪也发挥了坐标寻物的独有优势，如果没有坐标，情形好比大海捞针，不要说夜晚，就算白天也不好找到目标。找不到目标就谈不上“观察”这两个字，更谈不上拍摄其它方面的了。

今日所做的事是为以后做的，之后的日子便是好好体会观察植物生长所带来的视觉和精神上的享受。

Very Happy

MANDII
2010/01/30


<< 山上植物观察照片综合列表 >>

记录: 类别码 描述 (RA,DEC) 观察时间1_照片号 | 观察时间2_照片号 .... | 观察时间N_照片号
( RA=18h00m = 东水平 , DEC=90=正北, 赤道仪对好极轴)

TREE01 山顶松 (18h59m,-17) 2010/01/24下午_NO.1
TREE02 暗树径 (18h45m,-14) 2010/01/24中午_NO.2 | 2010/01/26晚_NO.4 | 2010/04/25下午_NO.8 | 2010/04/25晚_NO.11 | 2010/04/27晚_NO.12
TREE03 竹 (18h20m,0) 2010/04/25下午_NO.10
TREE04 蛇型树径 (18h20m,+23) 2010/05/01下午_NO.14

FLOWER01 红花 (18h5m,-14) 2010/01/24下午_NO.3
FLOWER02 小黄色的花 (18h20m,+1) 2010/04/25下午_NO.9
FLOWER03 小白色和黄色的花 (17h50m,+30) 2010/05/02中午_NO.15 | 2010/05/05晚_NO.17| 2010/06/21晚_NO.25
FLOWER04 红花 (17h48m,+26) 2010/05/08下午_NO.18
FLOWER05 大深红花 (18h00m,+23) 2010/05/09早上_NO.19
FLOWER06 小红色花 (18h40m,-6) 2010/05/16午_NO.21

GRASS01 杂草 (18h40m,-14) 2010/01/27晚_NO.5
GRASS02 杂草 (18h00m,+29) 2010/04/23晚_NO.7

FRUIT01 山顶松树果子 (18h10m,+31) 2010/01/31下午_NO.6
FRUIT02 待开花的粒状物 (18h25m,-6) 2010/05/01下午_NO.13 | 2010/05/14晚_NO.20 |2010/06/16早_NO.23

LEAVE01 松叶 (18h15m,+12) 2010/05/02下午_NO.16
LEAVE02 大块叶 (18h44m,-6) 2010/05/16下午_NO.22
LEAVE03 大绿叶 (18h15m,+4) 2010/06/16下午_NO.24




Total : 17 objects 25 observations

MANDII
created on 2010/05/02
updated on 2010/06/21

想念香港同好Alget大!

喔！！你说的Alget 我好像有点印像了，和他在论坛里是也有过交流的。
他给我的感觉的确也是挺有内涵的一个人来的。
不过好久没看到他来论坛了，可能小上网的原因吧。

对了，以下是经典语录，当天做好的那天，忘记了貼上来审报呀，现在看起来有点傻气，但叫我再写也写不出那样的诗了，哈哈！


大功告成 !

此桶远道运来的先进航天隔热涂料的确物有所值。白天下午3点时份试了一下,之前未涂时内墙壁和顶部内墙用手摸是会暖暖的,但涂了后感觉冰凉冰凉的。而且圆顶盖内部也是没有一点热的感觉。再比较一下外墙和地砖的温度差, 地砖是热的,但涂了料的外墙依然没什么温度,只会比内墙要暖和一点点那样.。简直是神奇 ! 再把盖开向北方,把门一开,马上有自然风抽送进来,非常的凉快,那便是为什么那个门要特意做在南面的位置,而并不是西面的位置。

好了,白天能在天文台里做事睡午觉的其一目的看来是能做到了。晚上看星玩天文是漫长的路,有待实践。

结语/Summary ：

Standing up the mountain high
Looking down the window street
People all over the world
They say nothing last forever
Nothing can last forever
But the Deep Deep Sky at Night
And Memory … .

和情人轻轻哼句歌
悠悠然倚窗观星座
问什么帮过我
令年月 未 枉 过


公元2009年10月31日
MANDII（林月笙）敬献

<< 天文观察报告和照片综合列表 >>

总引：
深空天体观察中，人手寻星是最令人兴奋，最有成功感的一个过程。观察记录便有必要把这方面具体地体验出来。寻星用的星图见其效用，于观察当晚打印出来用。
人手寻星图列表，见“予定的天体目标”数据库。 http://www.hkastroforum.net/viewtopic.php?t=17905&start=45

记录条: 天体名称 日期1_照片顺序号 | ... |日期N_照片顺序号
观察报告图内容:
包含予先造好的寻星用星图,和当晚拍下的实体照片，合并为一份观察图，也能查看予定和实际观察上的时间延迟,方便日后跟进以及管理。


M13: 2010/6/29_NO.9
M42 : 2009/12/05_No.1 | 2010/01/12_No.2 | 2010/01/31_No.3
M57:2010/07/04_No.11
M64(天区):2010/07/01_No.10
M101(天区) : 2010/06/07_No.8
NGC7000(天区) : 2009/11/21_No.4
火星: 2010/01/29_No.5
土星: 2010/03/19_No.6
Stars : 2010/01/20_No.7
Moon： 2009/12/23_No.0





Total 10 objects 12 observations




MANDII
Created on 2010/05/09
Updated on 2010/07/04

<< 月球表面地形观察照片图综合列表 >>

记录条:
环形山名称_地图环形山号码 观察1 |观察2 . .|观察N

1.观察=日期时间_(目视的月亮方位,高度,月亮大小约数)_照片顺序号
2.照片内容: 包含放大了的实物照片和相应的地形地图剪辑,合拼成一张照片图,方便对照之用。以及器材拍摄资料。

克劳默特 Cleomede _19 : 2010/05/17 19:40_(West,45,20%)_NO.1
哥白尼 Copernicus_223 : 2010/06/22 20:05_(East,70,65%)_NO.3
郎格尔努斯 Langrenus_78 : 2010/05/18 20:00_(West,45,23%)_NO.2
第谷 Tycho_176 : 2010/06/22 20:05_(East,70,65%)_NO.4



Total 4 objects 4 observations


MANDII
Created on 2010 / 05 / 09
Updated on 2010 / 06 / 22



目前好想拍高清的月坎。

购置了Kson 7.7mm 1.25" 目镜和3X barlow , 但试了成效不高。
原因不是目镜和barlow质量不好，总的来说应该是我错误判断了MIZAR望洋镜的放大倍数，白白浪费这笔不必要的投资。

1.本来我要求放大到200倍就刚好的，像克劳默特那副再放大一倍 。 600/7.7*3=233倍,我以为镜子最高应该有200倍,高一点点33倍应该没什么,但实际上就是很不清晰，试了不同的目镜在目视下的情况,其实以前也试了4mm的目镜（150倍）也是很不清，开头以为是0.965“的目镜关系,现在觉得应该不是了。
放大高一倍，目视光度会暗4倍。但问题不只是暗，而是毛湖。我估计MIZAR镜最多也只有100-120倍那样清晰度还可以接受。

2.试了用DSI来拍，以前单单DSI拍放大只有70倍那样，而且没有DC拍得清，因此一直不喜欢用DSI来拍月。
现在试了3X barlow，1.25"的能配用，的确是放大了很多，但那样210倍下也是很毛湖。其实我不应该买3倍barlow ,应该2倍比较好的。之前试了下载K3CCDTOOL试了一下， 不知为何无法识别DSI来，后来也没理了。

3. 目镜后拍，始终是不够清，多了那么多的镜片。我作晚试用web cam 来拍，刚好家里有个陈年web cam ，很久以前的，640*480 ， 像数可能只有30/40万那样， 15 flames/second ，我作晚把它的头除下，手持目镜坐里试了一下，下载了一个通用软件，是可以拍下AVI来了（作晚天非常多云，月很不清），但后来在作图象处理时发现IRIS无法分解AVI档，本来要分解到3色后再叠加的，出了一些错误信息，还在试验中。。。本来还打算买部1000万以上的DC，但现在看来目镜后拍不是一个好做法，以后很有可能会放弃目镜后拍摄，因此DC也是没必要再买的了。现在只稀望 web cam 能拍出清晰的来，但估计也是要一段磨合时期了。

MANDII
2010/06/24

试了一个下午，终于解决了IRIS软件上的问题,IRIS无法处理是因为AVI档codec 的问题,再下载多一个软件便能把AVI修恢。
然后IRIS便可以正常工作。得出一个最终叠加200张后的jpec 档了！
不过还没认真做中间的处理，只是在试软件而已。
目前web cam 进度来说，就是说能把任何一个web cam ,获取其在望洋镜里的AVI 录像，然后做成一副合成叠加后的照片了。
就是那获取录像的软件，没办法与DSI共用，否则也可以用DSI来录像。

下一步就是要想办法把web cam 固定到1.25" / 0.965" 的目镜坐上可以了，那问题不难解决的。不过要试了最终的照片质素才做那个，因为未必一定就是用那部web cam 的。
MANDII
2010/06/25

<< 于论坛主要发表的文章点激数统计管理 >>

记录条:
文章主题名称(以点激数高底排行)
查数1日期_时间_点激数,...,查数N日期_时间_点激数(增加数)

器材篇:
1.自制家用天文台 --- MANDII
2010/05/10_9:30_23650 , 2010/05/17_16:30_24257(+607) , 2010/06/11_11:06_25872(+1615)


[
美国全球性天文论坛
ASTRONOMY FORUNM( Observatory made by own )
http://www.astronomyforum.net/home-observatory-forums/91069-observatory-made-own.html

2010/05/10_9:30(回复124/总数2783)
2010/05/10_目前同类天文台文章回复与点激数排名第二位 !
2010/05/17_16:30_2852(+69)

2010/06/11_11:06(回复134/总数3299 +447) 目前同类天文台文章回复与第一位拉平，点激数以19点领先，排名第一位 ! 哈哈！！


中国牧夫论坛
2010/05/10_9:30_7442 ,2010/05/17_16:30_7825(+383)，2010/06/11_11:06_8836(+1011)
}




2.MIZAR Astronomical Telescope
2010/05/10_9:30_16565 ,2010/05/17_16:30_17147(+582)，2010/06/11_11:06_18673(+1526)

3.10X50 双筒镜观星的乐趣和方法
2010/05/10_9:30_12698 ,2010/05/17_16:30_12829(+130)，2010/06/11_11:06_13407(+578)

4.Video Astronomy : Video CCD
2010/05/10_9:30_6790 , 2010/05/17_16:30_6878(+89)，2010/06/11_11:06_7159(+281)

5.人肉GOTO坐标法找星 和 其它技术开创
2010/05/10_9:30_775 ,2010/05/17_16:30_811(+36) ，2010/06/11_11:06_1832(+1021)

6.ORION SKYVIEW PROtm 6 EQ Equatorial Relector Telescope
2010/06/11_11:06_194(+194)


观察篇:


1.天望坐标式追踪,观察山上的 [果实,鸟巢 ,密蜂巢和奇花异草]
2010/05/10_9:30_6095 , 2010/05/17_16:30_6659(+564) ,2010/06/11_11:06_7610(+951)

2.预定的剩余观察目标
2010/05/10_9:30_6637 ,2010/05/17_16:30_6930(+293) , 2010/06/11_11:06_7540(+610)

3.天文观察雜记
2010/05/10_9:30_6142 ,2010/05/17_16:30_6379(+237),2010/06/11_11:06_7264(+885)

4.月面欣赏和觀察
2010/05/10_9:30_1676 ,2010/05/17_16:30_1838(+162),2010/06/11_11:06_2719(+881)




TOTAL INCREMENT :
2010/05/17_16:30 ( +3152)
2010/06/11_11:06 (+10000)



MANDII
Created on 2010/05/10
Updated on 2010/06/11

要自己做一个圆顶室（除非是购买会好一点），得对业余天文学或者应该说是观星摄影学有所认识和深究，因为不单单是做一个圆顶室，还要考虑到环境,设备,技术，个人的目标和爱好，资金和时间的投入等等互动互补的因素，都得深思熟虑。
为了更有组织地更方便地把所有人过去和未来各方面的看法收集,以及本人日后对使用此圆顶室的经过，有必要把资料整合。见下：

1）[ 本地的环境情况和条件 ]
a)网上预测云量
http://www.hkastroforum.net/viewtopic.php?t=17079
HK天文台的信息分析方法：
http://www.hkastroforum.net/viewtopic.php?t=17487&postdays=0&postorder=asc&start=45
外国网站的天气预报： http://www.spaceweather.com/

b) 没看到有北极星,对极问题有待解决,drifting method 要求的2个星 不太乐观能找到。地理法也貌似正北方没有地标可言（2009/10/09）
- 能看到北极星,可用view finder作对极镜 (2009/11/10)

c) 多云的天数比想像中要多，目前也不太能够接受这一点。（2009/10/15）

d) 好似寻晚甘，又系一粒星都无。
一个月有一半时间有月光，另一半又要好天。有10粒8粒星为之好天，一个月都5知有无3日。10月头开始到衣家都有个半月了，好似只系得3日倒系好天。一年有30日好天都已经叫做不错。30日里仲要系非常清的天，要见到比较多的星，又会有几多日呢。。。我越来越体会到天气系最决定性的因素究竟将来好5好放甘多钱落D星星度,呵呵。。 。
不过，乐趣都系要自己稳的，我并不会因此便对天文失望的。衣家又5系一定无星的，又或者又5系无野玩，只系暂时觉得不宜作太大投资姐嘛，哈哈。 (2009/11/20)

e) 其实实践告诉我能看星的天也是不小的,不一定要很好的天气才能看的，只要能把握任何的时机便可。只是自己没那么多空闲的时间才是真正问题的原因。（2009/12/10）

f ) HK 09年天气回顾(2010/01/12)
http://www.hkastroforum.net/viewtopic.php?p=174398#174398


2) [ 设备方面 ]
- 选购
a) 赤道仪： http://www.hkastroforum.net/viewtopic.php?t=17324
b) DC照相机: http://www.hkastroforum.net/viewtopic.php?p=167693#167693
c)萬能支架可將DC固定在目鏡後
http://www.hkastroforum.net/viewtopic.php?t=17871
d)购买天文望远镜:
http://www.hkastroforum.net/viewtopic.php?t=18069&postdays=0&postorder=asc&start=0
e)购买MEADE DSI 的经过:
http://www.hkastroforum.net/viewtopic.php?t=17988&postdays=0&postorder=asc&start=15
f)购买EQ3-2的9尾糟和板,以升级EQ3-2到EQ3-D版本
http://www.hkastroforum.net/viewtopic.php?p=177823#177823
g)计划购买大牛反
http://www.hkastroforum.net/viewtopic.php?t=19073

- 原理
a)赤道仪
http://www.hkastroforum.net/viewtopic.php?t=17334
b)机械赤道仪人肉GOTO的数学公式(彭博士)
http://www.hkastroforum.net/viewtopic.php?p=169457#169457
c) meaning of Focal Ratio , 小F值的不等于是好的望远镜
http://www.hkastroforum.net/viewtopic.php?p=171754#171754


- 改进
自制牛反：
http://www.hkastroforum.net/viewtopic.php?t=18280&postdays=0&postorder=asc&start=0
- 自制Cloud checking system
http://www.hkastroforum.net/viewtopic.php?t=18356


3）[ 观星历程 ]
a) 双筒与底级摄影 http://www.hkastroforum.net/viewtopic.php?t=17433
b) 天文观察雜记 http://www.hkastroforum.net/viewtopic.php?p=168554#168554
c)预定的剩余观察目标
http://www.hkastroforum.net/viewtopic.php?p=168555#168555
d)用天望坐标式追踪,观察山上的 [果实,鸟巢 ,密蜂巢和奇花异草]
http://www.hkastroforum.net/viewtopic.php?p=174417#174417
e)月面欣赏和觀察
http://www.hkastroforum.net/viewtopic.php?p=182186#182186


4）[ 高级观察与摄影历程 ]
MIZAR Astronomical Telescope :
http://www.hkastroforum.net/viewtopic.php?p=170776#170776
人肉GOTO坐标法找星 和 其它技术开创总结 :
http://www.hkastroforum.net/viewtopic.php?t=19059
ORION SKYVIEW PROtm 6 EQ Equatorial Relector Telescope
http://www.hkastroforum.net/viewtopic.php?p=188413#188413

5）[ 拍Astronomy video的历程 ]
http://www.hkastroforum.net/viewtopic.php?p=165291#165291

6）[ 圆顶室的维护以及改进 ]

7）[ 其它 ]
- 香港天文论坛
http://www.hkastroforum.net/viewtopic.php?t=17007&start=0
- 美国全球性网站的observatory made by own 信息。
http://www.astronomyforum.net/home-observatory-forums/91069-observatory-made-own-5.html
- 国内网站的自制家用天文台信息
http://www.astronomy.com.cn/bbs/frame.php?frameon=yes
- 香港讨论区
http://www.discuss.com.hk/viewthread.php?tid=11826937&extra=page%3D1


MANDII
created on 2009/10/13
modify on 2010/06/09

MANDII兄

你好認真呀!

再次真心的佩服您

呵,Thank you 。
天文照片毕竟产量不多，我们这边好天很小，一般都是多云，好天加上刚巧有空有兴致就更小。。 。
这也是我为何一直不敢投资太大于器材方面，只能合到好处那样。

1月19日原定的半年计划到7月中结束,今天限期已到,现要总结试验成果报告。有关6点重点任务已于4月份总结了，没怎么不同。

总体测试报告：
M101和M108拍不到， 结果是拍到M42,M13和M57。
分别是单张暴光2秒（M42），1分钟（M13）和15秒（M57）拍下。

1. 6个月照片产量为3张，那么每年平均可望达到有6张的年产量。
这6个月会是本地最差的天气，估计往后的天气不会比这6个月差，只会比它好。个人的观星原动力也是很底，也没有很积极。
碰到好天又有空，兴致勃勃的，便拍拍玩玩那样，因此有错过不小的好天的。那么，以这样的情况来评估，
以目前的设备来说，年产量6张会是“最小”也有6张。

2. 以那3个晚上来说,印象中天空透明度都差不多,M13的那晚是最好。M57的那晚K25mm目镜里是能隐约看到十等以上的暗星点的。
那么，可以把好天定议为K25mm下能看到十等的暗星点，为之好天。
而且，大可以把M57的星等值，所属的天体类别，15秒的暴光时间，和能看到K25mm里的十等暗星点，
做为拍照深空天体的4个重点基数或参考值 ，可以透过比较以上4点来判别任何一个天体是否能被目前的设备拍下的可能性。

3. 根据予定目标数据库里初步的分析和评估，天体的星等，其在日常最方便的时间里（晚上9到11点），
以及其在该时段里所在的天空位置来说，是会有不小的天体比M57要光的，可能大部份为星团类别，星系几有一倆个，
但星云就不一定小了。不过M57也不能说是目前设备的最高能拍到达到天体目标，只能说是一个目前很好的参考天体。
因此，总的来说，往后要主力放在拍比M57要光的天体，以单片15秒到1分钟，顶多倆分钟便足够的天体，
赤道仪盲跟便足够，应当也有不小那样的天体数目能被发掘出来的。




MANDII
2010/07/15

可以參考一下阿炫的作法

http://202.133.248.90/roger/ashen.asp

雖然設備的等級不一樣

但如果整理成專頁, 可以看到整個計畫、進展、成果

相信會累積很大的貢獻

哇吓！这个列表做得非常好呀！
很有系统，而且里面的照片都拍得很出色！
配服这位人兄。
你们台湾天文风气真的很好呀。。 。

MANDII兄過獎了
跟歐美日等先進國家相比
台灣天文風氣應該還算不上「好」
 ;D

今晚终于有空试了下web cam .
没加 barlow 放大,云厚。
果然比用DC目镜后好 !

哈哈！果然靠炫大就可以提升台灣的形象

=_= !!

MIZAR牛反镜 会一直如期用到年底便会被Orion牛反镜取代,换了新镜就等于旧镜不会再用，正如以前的10X50双筒也是遭到同一命运。就那样收藏起来未免太可惜了。这倆天为此问题想出了一个念头来。

开发深圳家楼顶这个观星点也好。
因为没有多一部DSI/照像机，那就以目视为主。

开发深圳家楼顶观星点可行性分析：
1.我在那里来来往往的也住上有十年时间了,那里天气和天空暗度都要比香港家好很多的,北极星能看到。
2.虽然年底后估计在那边的时间会很小(一个月可能一俩天),目前就比较多,每个星期连weekend有三,四天都在那边,但如果只做观测,简单地用手上多余出来的器材,以不再作额外的器材投资为原则,只以消化香港多余出来的器材为原则
那么,那也是一条可造之途。

3.做法上,先把10X50双筒 和 EM8 拿过去,把EM8的脚修好便可用，免得再买个赤道仪多麻烦的。
其后年底便可把MIZAR 镜般上去，以MIZAR 和 EM8 来做目视。或许也会做一些简单的拍摄记录。
到年底时候也用了双筒也一段时间，对该天空环境也有一定的熟悉，用起MIZAR来也会更加上手。


计划即日生效 ！

MANDII
2010/07/26

近日发现美国论坛那边发生了重大的改变，有一篇天文台的文章突然殺出来，短短时间目前已排行第三位 !

短短一个月时间已有点击数812 , 59封，平均每封点击数为812/59=13.76 。
虽然比第二位（3819/140=27.2785）和我的（4057/149=27.2281）
平均点击数为底,但以该文作者那样的做笔记写文章速度,很快就会赶上来。

面临榜首位置不保的危机下（哈哈!），决定得改变下目前的写论坛文章策略。
过往以香港，中国和台湾为主，美国那边都没怎么理的实际上。
日后要以美国论坛为主，因为该论坛是一个全球性论坛，在我来说意义尤其重大！

为了方便免写中英倆份报告那么辛苦，日后要统一以英文写一份报告。
美国论坛先写，于观察当晚先写，或者第二天写，然后再copy到其它论坛去。


MANDII
2010/07/26

台灣南部有一個頭腦不太正常的瘋子，有三台重型赤道儀... :o

他花了台幣五千元，弄一個天文台....後來因屋頂要弄防水工程，先拆了...

臨去前，請我去拍了幾張遺照... ;D

原本還有放一台C11，聽說先載回去要拍ISS凌日...所以G11上面就空著..

哈哈,不错。
有时候疯子和天才只是一念之差而已。
至小，我并不觉得他那样是不正常的，这张遺照你也拍得合时，哈哈！

总结各论坛专家们有关倆支牛反合拼用的意见 :

合为单筒使用,深不可测,目前也没有可行的光路设计图可依照。
合为双筒，有待试验，但成数秒芒。

因此，7月26日原定计划，以分开镜子倆地使用，开矿深圳楼顶观星点的计划，会是一个最实际，省时省力，底成本，高成效的方案 ！


MANDII
2010/08/02

It's long time no take an astro picture ,
cause recently not always stay at home .
Tonight , I come to take a picture of Archimedes .
I pick up the moon map , nevigate the moon surface for nearly 15 minutes . And center the eyepiece after I can locate the Archimedes . Then use web cam to shoot it . Finally make the picture by Registax software .

No.6)

Tonight is cloudy .
Long time no take a picture .

So samely I come for those plants over the hill , they are always my favourite simple picturing objects .Anytime I want to take a picture , I just come to take them ,so easily .
No need to wait for clear sky , no need too much concern on machine or whatever , because they are just easy and funny . And plants observation is gradually becomming my new hobby since the time I established such a kind of telescope imaging system ,as times goes by . Besides the fact that the moon crators and the Deep sky objects is always my fancy .

I had recorded down as a well organised databse system for the each plants' visual position/location in my home forunm indeed . Easy to find them out everytime by just turning the mount's DEC & RA circles accordingly . So far I had 17 plant objects in well notes and did 26 observation ( photos) within this 8 months time ,day and night observations . Actually I am still finding the bird nest or honey bee nest over the trees , they were once my expectation at the beginning time of this hobby . One day I may find it out , or I could never find it out , who knows .

But I do like taking a simple photo of plants/trees actually ,with the use of DSI-I .
Same object is always change with time , they looks different as times goes by , that will never make me feel routine and boring as well .


MANDII
2010/08/29

Last night the moon was very bright , actually not a good time to take a image ,atmosphere was not stable as well .

This time I tried my new bought 1.25" 2X barlow together with the web cam . Previously I had failed to capture a good 3X barlow image , cause too big magnification for my 4" telescope and blur the image indeed . But this time with 2X barlow , the image is still acceptable . I am satisfield with this cheap price Barlow very much .

This time the target is the "比利牛斯" mountain chain , the BillyNews mountain chain . You can also see some nearby crators , and such magnification is just enough for me , compared with those taken previously without the barlow

Finally , this time I write my report on the next day of observation night . So that I can have plenty of time to prepare a better image . Before I didn't pay too much attention on the image processing indeed , cause I don't have much time to try on the night time . So,this morning I am free in office and try more on the software REGISTAX . I found it has good tools to make the image better and sharper . That's a good and neat software .

很不錯哦

這樣很有系統的整理.. :D

The black trunk of a tree .
Leaves widespread .
Taken at noon time .
 :)

I had use different eyepieces to look over the hill this afternoon , for nearly an hour today . The plants under sunshine afternoon always looks smart . And very sharp in my telescope . I found this visual point beautiful and note it down . And use the 2X barlow to magnify the image two times closer this time . Of course , stack more images as well .

Happy day to all of you .
 :)

I can't wait any longer the clear sky to take DSO picture , no such patience at all . It's always cloudy night in these days . And the clear night did really come silently sometimes , but it's easy to miss it at the same time .
That is becomming a problem now .

Tonight , my mind to use the telescope and DSI imager had come suddenly .
This visual point is meaningful and I want to note it down as a photo . . .

There is a hill on another opposite side , the west side , about 2 kilometers away from my observatory . It's a plain hill . So this time the visual location becomes RA 06h10min . 06h00min is the west horizontal level .
This picture recorded a group of Rocks , and a small path going up to the hill top . I focus on those rocks at the back , so the front side of the image becomes blur . This picture combines 117 images to make it more rich in content .

Probably more interesting items can be found among this hill area in future .

This is the jupitor last night . It's a failure .
Only a bright big cell , no details , no color .
I use the same web cam to shoot it . I tried to reduce the brightness( offset , gain / exposure) but the result is not so much difference . I even tried to use 2X Barlow to make it more dimmer . But samely not so effective . This picture is captured by 2X barlow .

The foucsing may not be so good as well . I think if using some focusing technique( fish-bone etc.. ) , the image can be revealled some of the jupitor details .
However, my main concern at first is that " how come the disc is so bright ?" "and why my webcam cannot make it dimmer ?" Even though I can focus it perfectly , I think the only difference is that there is a little hits of jupitor lines , but the disc is also white in color , so bright samely .



The same setup to shoot the moon surface is no problem . But the jupitor failed .
I guess the web cam is not suitable to use in taking Jupitor image . Because Jupitor is much more brighter than moon surface counted from the same area of lighting .
That's why we need to use those sepcific webcam , or astro webcam in taking the planets image . But my one is just a ordinary one .
But anyway , that is a good test this time .

Better note it down .. .

Tonight very exciting !!!
I use the DSI . And catch up the JUPITER for my first time successfully , HA HA HA !!

It's the DSI-I . Last night I use my ordinary webcam but failed .
And tonight I tried again the attempt using the DSI indeed .
And when I set the exposure to a very low value ( 0.0085s) , I can see some hits of Jupiter details . Last night my webcam cannot reduce the brightness to such a low value , But DSI CAN do it !! And very good indeed .

Then , of course . I take so many images , about 1600 images . And stack all of them in Registax . Half of the images can be combined sucessfully .

And got this beautiful picture that I had never got one before , Ha ha ha !!

This is the 3X barlow Jupiter last night .
At the beginning , I tested to cmbine 2X and 3 X ( total 6X) , but the image is very bad .
So finally I choose the 3X , which is still ok . . . But seems already reach the limitation of the scope .

2ndly, this time I combine using IRIS and Registax for those 1387 flames . Because I can only stack 150 flames in Registax , cause the image shifting is too big . As I check the shifting statistic in IRIS , over 150 pixels shifting in average speaking among those 1300 flames . Those , Registax seems cannot handle this situation . Thus , I use IRIS to do aligment first , because IRIS can be controlled much more ( more primitive ) , such that ALL those flames can be alighted proerply even such a big drifting .
And then I combine ALL of them in Registax ( by converting to FITS format from PIC format , which can be supported by Registax ) and do some finaly adjustement in Registax .

Once again process by IRIS only .
Aligntment , stacking and final image turning .
1528 Flames can be successfully stacked .

I make a Hartmann mask this morning and try to learn this focusing technique .
Because I want to see if there is any big difference on the final image being affacted by focus matter . Very advance method indeed invented by Mr.Hartmann ! Very sharp raw image I can get ! Before , I was not concernning too much on the focus matter actaully . This photo is the best I ever did so far on the territorial plants .

2ndly, This time I want to try more number of photos , over several hundreds I want to see . Stacked 282 DSI pictures for testing . And do processing in Registax . I found the fact that : when I stack more , the better photo is .
And I can retrive more details by stacking more .

今日是2010年的10月21日。

颱風“鮎魚”即将于本周未逼近本港，中国国家天文台正式对外宣告评估它为200年一遇的超级颱風。近日人心茫茫，电视收音机不停地广播风暴的最新动向和消息，目前会不会当真于香港登陆，还是未知之数。据美国报道，可能性挺高的。本人实有点坐立不安的感觉。

面临这场或许是世纪本港风災的到来，我最担心的事情竟然会真的来，还来得那么狠，那么撤底。我的天文台是2009年10月31日建好，正式使用的。再过一个星期便满一年了。

当初不敢建大点的天文台，就是考虑到在天台高处遇颱風时会很危险 ！或遭强风破坏，那不比在平地上建。始终这是自制的东西，不比购买的合乎规格的东西，心里或多或小总会有点不踏实的感觉。

君子不立危墙马，上智不处危以'尧'幸。换现代话，就是说凡事难于开始时下的一个决定，难于开始的估计判断。我并不是什么上智,但我在一开始的确是以安全为第一考虑点,才做这个合适尺寸的天文台来的。上次年中时也打过一次台风，还好没事。但这次可完全不同，绝不轻视之 ！

这一关能不能‘门马’过，就只能听天由命了。。 。
现在我想先把话说在前，我一向都喜欢先说后做，看能不能实现所说的话。而不是先做后说，等做到了才说。如果这回真的不幸避不过这关，过了这次颱風而未见我更新任何论坛上自己的文章的话，那么也就是说我的天文台已遭到破坏/不幸了，而本人撤退业余天文界的时间也同样的到临。


祝各位来自各地的天文同好，身体健康 ！
Clear skys .

MANDII
2010/10/21

US Astronomy Today :

Dear All people around the every corner of the world ,

Today is October 21,2010 .
I come to say one very bad news on my astronomy observation notes .
I observe a typhoon is comming this time , Ha Ha ! Not really kidding .

The strongest Typhoon “鮎魚” / " FISH" that HK ever had one in history , is comming soon this weekend .China National Observatory say that it is a super typhoon which would probably comes every 200 years for one time .And I check some US weather forecast also revealled that it is quite possibible to hit Hong kong city DIRECTLY .For the time being , it's still hard to judge anything about how much impact can cause by this time's disaster .


Frankly speaking , I am feeling a bit worried right now .. .
My Observatory was completely built on 31 October of Astronomy Year 2009 .
Within one more week time , It will be used for 1 FULL year of time .

If my observatory cannot come over this typhoon , I will definitely quit astronomy hobby at the same time .And I will not update this thread anymore in future . In reverse words , if you can't see any update of this thread after this weekend , it would mean my observatory had been destroyed by the so called 'FISH' typhoon this time .


Old chinese word always says the truth ,
A clever man never ride his horse near a danger wall .
A wiser would never take it easy and pay no attention on a real danger that may comes in underground .I am definitely not a wiser , however, I did think 3 times before doing it , when considering the size of the observatory in accounting to the strong wind affaction , at the beginning of my design stage of the building .

And now the testing time comes !
And even it comes so strongly and fiercely this time for the testing .. .


Take care everybody .


MANDII
2010/10/21

這個颱風結構扎實，外圍環流結合鋒面已經讓台灣的宜蘭某些地方3個小時降下超過250mm的雨量，進而宜蘭縣已經宣布全縣停工停課
也讓台灣北部下了1個星期的雨了

看來颱風的暴風半徑會掃過香港
還請MandII兄多加保重

Mandii 大佬，香港颱風一樣多，下次考慮建成金字塔型，就無有怕了，看埃及的金字塔屹立數千年。

谢谢大家的提醒和意见 ;D。
你们也是，多加注意，我也是经常听说台湾台风多。

No.8 )

Dear Joe ,

I see . Thanks for your care

So the wind last night had passed and left .
I had found a chance to take a moon photo last night .
It's the Mare Imbrium , a large oceanic area on the moon .
You can check several apparent areas as well from the moon map I provided , I had bold it in Red blocks .

The FOV of this picture ( DSI plus 2X barlow ) this time is about 12" , according to the indication on the moon map software . Starting from now, I can use this software to physically measure the FOV of any telescope imaging system . And I can even measure the distance between two points on the moon directly . In the old time , I can only calculate ( i.e. estimate ) the FOV , but now I can measure it directly and PHYSICALLY with the help of the actual moon crators , this is very important to me .

I am not using a web cam this time indeed .
282 flames is collected in about 5 minutes from DSI .
Comparing to webcam , Just several second can be collected for such number of flames in a video format . The shorter the time , the less the requirement from the mount's tracking . So DSI surely can cause more shifting in image than the web cam . However , such image shifting can be recovered easily from any image-process software . And DSI is more sensitive than my ordinary web cam , ( even the price is more exspensive ) , thus , I may use DSI to take moon photo in future , and totally replace the use of a web cam . Because DSI is more generic in my situation .


Clear skies everybody .

No.9)
The moon is rising up the hill , behind a tree .
This moment leaves silently and fastly .

The picture was shooted at 7:00p.m tonight , within less than 10 seconds time .
I focus on the tree , and let the moon become a blured background .

我的另一样爱好，是改装邮轮模型做摇控电玩。
我们一班老发烧友每个星期日早上都要放船的。 
建设天文台的其一重要目的，就是白天可以在里头搞模型用，也能放不小的模型用具。
上星期日第一部于天文台里造好的是这部邮轮-“铁达呢”号，有一米那么长，正式下水 ！哈哈！
我花了一共3个月的时间把它从刚买回来的模型零件，到做好模型，油7，再改装电控摇控。
下一部计划明年要做的Queen Mary 2 ,也有一米长那样。

<<中国牧夫 >>

Canon20da : 2010-12-1 23:07

i am in hong kong now. any chance we can get together? i would love to see your observatory if you have free time. you are a little famous in china already. he he
you might remember that we chatted before. i am an american living in chengdu, sichuan. i have a meade dsi camera also.
do you know of anyone who is selling a used (second-hand) Meade ETX telescope? also, i am interested in buying the book Photoshop Astronomy. someone on the hong kong astronomy club's forum webpage was trying to sell this book but i am unsure how to get ahold of him ()
http://www.hkastroforum.net/viewtopic.php?t=18701&sid=c39394d1422d3abdc8d8deee0a8e5fd4
. i would apprecaite your help! mike (canon 20da) mikezele@hotmail.com



MANDII : 2010-12-2 09:55

Well Canon ! long time no see ! your message 哈哈!
Pls check my PM , I leave my phone no. there .
Also , about the 2nd hand ETX telescope and the magazine ,
I may do something for you , let's see it .

月上樹梢很有復古風

呵,大疯兄 :)

moved .

M42 on 2010/12/08 ,EQ3盲跟36分钟 。

《以下总结整个现有器材的深空拍摄步骤》


前题:

目的:
以拍照作天文深空观察的手段，作记录。此谓深空观察记录，而并非深空摄影。
      好比日常生活中用手机拍拍写照，用写照来记录生活，而并非专业摄影的意思。
      在照片上能看到一般的深空天体（DSO）。不能太讲究照片的质量和美感。
      分倆类DSO，一类是在现有4“600mm牛反望远镜，当晚天空情况，K25mm目镜里能看到。
      一类是K25mm目镜里看不到，但有可能在现有4“牛反望远镜，当晚天空情况，DSI-I拍得到的。

天空情况：一般般暗的半城市半交区的天空，透明度不怎么高，烟霞云量比较谱篇。

拍摄器材成本：哈哈！
-日本MIZAR 4”600mm 牛反，二手，400港币。
- 智通EQ3-II赤道仪带单跟，二手，300港币。
- K25mm 目镜，不用钱。
- Meade DSI-I 彩版。二手，800港币。
- 电脑，不用钱，本身有。

总成本：1500港币。


拍摄时间：三个小时，三个小时内要完成整个拍摄，一般由晚上9点到12点。



具体步骤:
1.查星图,人肉GOTO初始化设定，启程（直接指向该DSO）。

2.插入目镜看能否看到该DSO,能看到便可安心慢慢拍照，跳过第3和4步，直接进入第5步，不急，
  此时对焦好不好也不重要，因为肯定是能拍到！而对焦只会影响最终照片毛湖一点就是，没什么大不了的,
  目前来说。但是如果看不到怎么办？？我估计百份之80以上的情况都会是看不到，那便得先做第3和4步 ！

3.试暴10秒,星点是能看到的，从星点走动情况分辩屏幕上的东南西北方,调节DSI位置角度使屏幕能清楚
  识别星移方向(东西在横,南北在竖）。这是每个拍一个对象都要做的，
  因为每拍一个天体都要插上DSI，那位置都改了。
  知道位置有啥好处？？好处是便能按星图,在屏障上根据方向来找该天体！因为人肉GOTO有可能还不够准确到位的。
  因此还得需要微调, 边看星图，边看屏障微调天体位置，也是要花上时间的，我估计最小也要半个小时，
  不顺利的还得一个多小时都很正常的。 另外，就是方便接下来的第4步，能比较容易看拉线情况。
 
  好了，直到目前你还是没看到有该DSO的，你只是用几秒时间，看星点来推测位置而已。
  实际上你那几秒钟根本不可能看到该暗DSO的，M42那些明亮的就例外。
  那便得要在第4步里看能否看到了。

4.试暴3分钟，假如看不到便得回第三步重复地推测位置。
  假如试了多次，在推测位置是准确的情况下，都无法在屏幕上看到，那就要结束拍摄了。
  因为那结论指的是：目前的望远镜和DSI，在我当晚的天空下，是无法拍到该DSO，更不用对焦了。


5.重复暴光三分钟,看星点如何,此时该DSO会跟星点一起出现屏幕上,
  重复根据每次影像结果,作平衡微调，直到星点比较圆。
  虽然极轴是之前用漂移对好了，但每次每个位置还是要再微调东西平衡的，这也是相对时间而论。
  以我的设备为例，600mm到了3分钟就很明显的！2分钟以下的还可以马马虎虎应付。
  特别是镜子平衡影响最大，每个指向位置都会改变平衡情况，而会反映在星点东西移上。
  这步骤是最花时间的，每调小许，便要花上3分钟！调5，6次，都要花上我最小半小时了，
  而且非常的敏感！以之前的经验，一般上我都要做上一个小时就差不多了,如果顺利的话。

6.好不容易地做完第5步后，此时星点是够圆了。
  此时是能在屏幕上看到该DSO的，那如果要求高点的，还有精力的，那还可以细调对焦方面，
  使影像更清晰，但我估计，到了那个时候，都已经根皮力进。

7.以2，3分钟，不停地让电脑自动收集光子，此时自已可以休息了。 
   
因为一晚只能2，3个小时花在拍摄上，有的地方没法做得很理想。


MANDII
2010/12/10

   
[size=18][/size]

今日是公元2010年12月12日。
Mike Canon 来自美国阿里桑拿洲,是一家公司老总,公司有业务在国内，这次来香港主要是治伤，
便想来我家玩，看看天文台。他是一位非常热爱天文的人，今晨一大早来我家坐，
我和他相处了整整半天，觉得他人很好，很nice。
本人非常荣幸他的到来。Thank you Mike ！ :)

MANDII

more

Final

 那棟白屋 是下一個天文台嗎?

不,多用途房屋,或许未来也贮藏大型望远镜,说不定。 :)
前几天才刚建好。还有那个棚架，棚架是我自己一个人做的。
那棚架有轮子，可以很顺滑地转动竿，把帆布拉开和收起。
它的位置已予留和倆边成90度的墙壁隔开一尺半的宽度，以后会再弄花槽，种高高的树木，
像那颗松树那么高的密密的，那样就成了一个空中花园，也可以挡光。

moved

2010年12月21日11:00a.m 焊登 |ClOUDY NIGHT|


OBSERVATORY made by own -- MANDII (HONG KONG)
http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Board/Observatory/Number/4261234/page/0/view/collapsed/sb/5/o/all/fpart/1


Donnie : 12/20/10 09:37 PM from Western Ky
Hi, great looking setup.

Alex McConahay : 12/20/10 09:46 PM from unkown
Yes, very nice.
Should give some nice views of moon and planets. May be a bit difficult on deep sky, considering the possibility of light pollution!
Alex


Aircrftr :12/20/10 09:47 PM from Claremore OK
Very nice Mandii !! there is always great satisfaction in building things on your own. Job well done!


csa/montanaModerator : 12/20/10 09:48 PM from montana
Welcome to Cloudy Nights, and especially the Observatory Forum!
What a beautiful observatory you have! Congratulations! Thank you so much for posting such nice photos, and sharing your observatory with us!
Looking forward to hearing more from you, and your experiences with your observatory.
--------------------
Carol


David Pavlich :12/20/10 10:20 PM from Mandeville, LA USA
Welcome to Cloudy Nights! You did a great job.
David


tomtom1957 : 12/20/10 10:32 PM from Winnfield,La.
Looks really great,happy star hunting.


MANDII : 12/20/10 10:46 PM
Thank you everybody
Good DAY to ALL of YOU !!!


GeneT : 12/20/10 11:14 PM from South Texas
Beautiful observatory! Welcome fellow astronomer, from the beautiful city of Hong Kong!
GeneT

Cloudy nights at 12/21/10 04:23 AM

Dear ALL ,

Pls let me explain a bit of the background in building the Observatory by own .

The observatory was completely built on october 31th of ASTRONOMY year 2009 .
I decided to build it , on the right time of the year .
Structure Design started on Augest,2009 .
The design tooks time in considering the building size , the usage ,the cost ,etc ...
as much as I can think about it at that time ,for nearly 1 months time .
I had confirmed the drawings finally , the diagram draws the detail structure and size of 3 main components ,and I passed them to 3 different local makers in a city near Hong Kong , the shenzhen(china). It that case ,the cost was much lower . They made it according to my drawings and according my ideas talking through several meetings with them .
The 3 components consist of a Halfly-opened Dome, Iron track and a curved Door .
The 3 components must be compatible in size and can be matched well to the overall structure of the final building ,before they are completely made and transported to my home . So , that's real difficluty at that time .Any wrong dimension of the 3 components will cause big trouble in final stage when making the building wall .The buiding wall is made by my uncle and me together .

In the past one year time of my astronomy hobby , I use the observatory very oftenly , I like taking photos . Though the weather is not always fine . It's always the cloudy nights . However , Finally I had decided to expand my usage of the observatory in 3 ways mainly , such that I still can use my telescope imaging system , at any time that I would like to use , to reduce the weather effect to much lower level .

The 3 ways are , First of all , I take image of the plants over the hill, the visual position of each plants is recorded down by RA and DEC scale such that I can find them easily at any time for repeatly observation . Plants imaging can be any time (day time and night time ) by using the meade DSI imager . 2ndly , I take image of the moon craters . I use the moon map to find the craters under over 100X magification . Each craters are noted down as images , by DSI imager or a self modified web cam . There are so many craters on the moon , as well as the nearby scenery on the moon surface , each one is recorded as photo . That is always a big fun .
3rdly , in some clear nights , I take images of DSO . That is a challenging task as all we amenturs can know it . So far I am still trying on the way . My first target is to use low pricing equipments( less than 3000HKD for telescope , mount and DSI-I) to catch up these DSO . I had experience in finding the DSO by simply using the RA and DEC scale of the mount . And catch them as possibily as I can do it . The method I called is 'Manual GOTO" , it can point to the object directly by using the realtive RA and DEC coordinates from the star chat . And of couse need some fine turns of the locations by hand . And finally take photo of it by using DSI-I . So far I found this way is challenging and I enjoy it very much indeed .







MANDII
2010/12/21

<< Cloudy Night >>

nytecam : 12/21/10 06:45 AM from London UK
Very smart looking domed observatory - good luck with your future observations
A query - how do you seal the two halves of the dome from rainwater penetration


MANDII : 12/21/10 09:11 AM
well , rainwater was the first priority in determine the dome structure at the beginning. The dome has two halves ( inner and outer).Outer halve put over the inner halve , and outter halve rotates to open and close the dome . you can look at the shape of Inner halve(pic.1),typically at the top end it's tilted a bit upward (2cm). Pic.2 shows the outter halve open on top of the inner halve . Pic.3 shows the dome is closed . Note that in pic.4 , the outter halve covers more the inner halve , about 5cm more . Plus the tilted end of the inner halve , it's enough to prevent the rain penetrating .
2ndly , Pic.6 is the iron track with wheels inside , the inner halve fixed on top of the track by screws . You can see the black rubber on top surface of the track . Aims to insulate the rain .

In last summer , heavy rains always come , long lasting days . It's No big deal .

pic.1
http://www.hkastroforum.net/files/dsc00014_101.jpg

pic.2
http://www.hkastroforum.net/files/dsc00017_296.jpg

pic.3
http://www.hkastroforum.net/files/dsc00015_193.jpg

pic.4
http://www.hkastroforum.net/files/dsc00016_173.jpg

pic5.
http://www.hkastroforum.net/files/dsc00019_160.jpg

pic.6
http://www.hkastroforum.net/files/dsc00009_297.jpg


Bob Griffiths : 12/21/10 09:35 AM from Frederick Maryland
Mandi:

It is about time you discovered these forums here at cloudy nights and especially this observatory forum... lol

I've followed you posts on another forum for quite some time and I've been impressed with your progress

Bob G


Starman27 : 12/21/10 09:43 AM from Illinois, Iowa
Mandi,

Outstanding work! Thanks for the detailed discussion and images.
Enjoy the dark,
Herman


MANDII : 12/21/10 09:52 AM
WOW BOB , the master BOB ,ha ha !!
How do you find me out here , a nice place . Ha ha .



MANDII :12/21/10 09:53 AM
Thanks everybody !

MANDII :12/21/10 09:50 PM

These are the drawings of the dome , track & the door .
They are all the first draft ,first version . The other latter updated drawings was lost , so pity . These drawing are not professional one indeed , cause I am not an engineer . In addition to the drawings , I need to verbally explain to those 3 makers very oftenly at same time .It takes about 2 weeks time to complete all the 3 things on nearly same timming . I collect and inspect the 3 components in one single night on 9th september of 2009 , from the 3 makers that are located very far away in Shenzhen indeed , and brought them to my shenzhen home together( pic.0) . Two days after , they were all transported to HONG KONG in a single truck .


The measurements was changed in latter stage after the first drawing , the structure of Dome and the door did change as well .

In pic.1 , originally the outter halve was thought to open and close upward and downward . However , when I consider more the strong wind influence , finally I decided to open and close horizontally in rotation manner .Meaning that the fix point(big screw) was set at the top of the dome . That is much simpler in design and stronger in striving against the big wind . And also , there is another big screw(upward) to lock the outter halve from moving . You can see the pic.1 of previous post . There is a screw hole at the front side of the inner halve . Normally , I seldom lock it . Small wind cannot move the halve easily . I only lock it on Summer time cause big storm may sometimes come suddenly .


The Iron track(pic.2) weight about 30KG . It has totally 8 wheels inside . And a hand panel ouside to push it moving .Design of the iron track was not changed much through the way . Inside the iron track , I use the lubricating mechanical Oil to make it move very smoothly . I like the mechanical sound 'lung lung' when it's moving . Very real indeed .


The side-openned door(pic.3) had been considered to hide away from the rain water as well . Typically at the side track and at the bottom track ,the water will be kept inside the bottom track and drain the inner observatory , thus I need to make some holes at the bottom track , to let water goes outward . You can see two holes on the pic.5 of previous post .

pic.0
http://www.hkastroforum.net/files/dsc00002_397.jpg

pic.1
http://www.hkastroforum.net/files/dome_122.jpg

pic.2
http://www.hkastroforum.net/files/3406_0001_875.jpg

pic.3
http://www.hkastroforum.net/files/door_212.jpg

quantumac : 12/22/10 04:32 PM from unknown

Happiness is a working observatory. I've had my roll-off-roof observatory since 1995. My late step-dad helped me design and build it.

Thank you for sharing MANDII.




MANDII : 12/22/10 09:24 PM
Wow ,you made one in last century , long history , ha ha .
Yes, it always need help from one's nearest family members in doing such tough thing .
Your dad help you at that time , very valuable experience with your dad ,
I am sure you will not forget it through your life .
Samely , my uncle helped me last year .

Frankly speaking .. . it's already a year time ,
As now I remind those hard time once again , the final stage in making up the whole building , the real working person,or I should say the real hero at the back , who use his hand to build up this observatory ,who even don't know what astronomy and what an observatory is , is not me , is my dearest uncle indeed !

I want to say something about the real hero at the back for this observatory now ,
My uncle is a man over 60's aged , still looks very young , already retired for long time .
He is very strong and healthy , he was a construction labour in the old time .
And he know the way to build a building wall using the bricks and cement .

This time , it's mainly done by my uncle , I was just helping to carry up heavy materials and things ,
and worked as an assistance of him , some simple coating /painting in final steps I may get involved of it .He is a real person who can understand me very well .
For many important things in my life , my uncle helped me a lot .. .
He had helped me to make one the most important decision in my life , long time ago .. .
And this time , it was not an exception as well ...
I just told him my plan and idea in the final building .
He understand it and make it for me . Very thanks for him !!

My UNCLE :
http://www.hkastroforum.net/files/dsc00071_197.jpg
http://www.hkastroforum.net/files/dsc00086_132.jpg
http://www.hkastroforum.net/files/dsc00087_197.jpg

Cloudy Nights

nytecam 12/23/10 07:20 AM from LONDON UK

Many thanks Mandii for the detailed photos and explanation - well done

Being pedantic, as an architect, I'd abreviate it as a concealed upstand edge [on the inner 'dome'] and a downstand drip on the outer over-riding 'dome' to stop wind-driven rainwater penetration






MANDII : 12/23/10 10:00 PM
Rain water was the first consideration .
2nd master consideration was heat insulation from the SUN .

To me , heat insulation is a key point , why ?
Because this factor determined how much use the observatory can be . The more the observatory can be used in various ways , the more valuable a observatory is .

As you can read my first post the objective of this project written on 3rd of september ,2009 ( beginning stage).
The observatory is not only aims in Night Astro-Hunting , but also used in daytime working(making plastic models) , reading books , taking a rest , etc .. And now in real usage from the past 1 year time , it's mainly use in playing the on-line games and do some Plant observation and imaging under telescope imaging system in daytime afternoon . Or sleeping inside . It did expand at least 50% of the observatory usage , by making it cool inside in daytime .


Two ways to achieve the goal of coolness inside the observatory .
1. I choosed to use the red bricks and cement as the structure of the body .Around total 8cm thickness of the wall and ceiling , Plus the high quality(600RMB)heat insulating coating paint that was bought far away from North West China ,it can reduce the room temp. to about or more than 20 degree celcious below the outside temp. in hot summer . About this pianting ( green bucket in pic.0 of prv.post),In last summer , outside temp. was about 35degree , when you put your hand over the platform ground , it's very hot ! It could be over 50degree on the ground surface . However , when you put your hand over the outter wall surface of the observatory , it was just warm feeling ! I guess less than 30 degree . And internal wall surface was much lower than external wall surface , feeling a bit warm indeed !!! And of couse , the room is very cool . That was very amazing at that time as I experienced !


2. The door was designed to be built in South side .
This is simple , but very useful !
When the dome is opened at Northern side, and the door is opened just a little in southern side ,natural cool wind is drawn automatically into the room , feeling very comfortable .


3. By using the bricks and cement with such thickness of 8cm , it is a good Sound insulator as well .
You will feel that it looks like a Cave on the platform indeed ! The inside is kept highly silent and cool when you close the door and dome , looks like a cave . When you speaking or listenning to music from computer , you will hear the echo sometimes ,very sharp and strong base music !


Merry Christmax Everybody on every astronomy corner of the world !!

OBSERVATORY made by own -- MANDII (HONG KONG)
http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Board/Observatory/Number/4261234/page/0/view/collapsed/sb/5/o/all/fpart/1




Best Regards
MANDII
2010/12/24

2010年12月26日一晚(9:00-12:00)用人肉GOTO拍的4个深空 :)

moved .

本人过往热衷于股票买卖,喜欢刀仔锯大树,大起大跌，最为刺激。
同理，玩天文也不例外，多劳多得，多发几张照片便多得文章的点激数。

这个是过去半年里于各个地方的天文论坛,文章发表的点激数统计。
一共14篇主要文章作记录,包括以"自制家用天文台 --- MANDII "的文章为首,
同时更新4(还在添加中)个地方具有代表性的天文论坛,包括香港,美国,台湾和中国。
每月4个论坛总的点激数“增长”有升有跌，本人称之为‘恒心指数“ ， 粤语‘心’和‘生’是同音字，
与香港股票市场的”恒生指数“类同，哈哈！
此指数，记录于香港论坛的"自制家用天文台 --- MANDII "的文章里，每月15日查数更新。

2010年度12月份本月（图恒心5），恒心指数首次突破2万点 ！！升6000多点。
谢谢大家支持！哈哈！



并祝各位新年快乐,身体健康。

MANDII
2010/12/31

moved .

< US ASTRONOMY >


Uncle Peter : Today, 03:23 AM from Toronto, Ontario
Mandii,

That's one great observatory that you've built! Just from one look, you can tell that that thing is solid. It's great that you posted your progress on it here, as well as pictures; they are very inspiring for other people.

You have some really great moon photos, too. I am trying to get into astro-photography, and have started on the moon, identifying a few of it's seas and craters along the way.

One question though, does your observatory help to decrease light pollution?

I can't wait to see more of your photos.

Clear Skies,

Uncle Peter




MANDII : Today, 09:10 AM
Thanks Uncle Peter‘s comment ,

You mean how the observatory can be hided from some of the outside light source ?
Or how the light pollution come from the sky , can be reduced it's impact in taking the images ?

For the first question , the dome halves can sheild away from much of the outside light sources already .
At least halfly ( 180 degree) light is avoided . Sometimes I even open the dome much less , with a little hole only, that can let me still enough to observe the object . Normally I kept very dark inside the dome( no lamp , PC monitor turns off , use red light star chat etc...) , during observation time .

If you are asking the 2nd question , I think you know that most people would choose to use some kind of imaging filters , to get rid of light pollution . However , for the moment , I didn't use filter yet .

Hope this answer are helpful . . .

<<中国牧夫>>

wweiboo: 2011-1-17 18:41
这也太厉害了吧，太强了


MANDII : 2011-1-18 09:53
------------
谢谢
------------

< US ASTRONOMY >

Uncle Peter : Yesterday, 04:46 AM from Toronto, Ontario

Yeah it was the first question I meant. Thanks for answering it Mandii.

moved .

去年6月8日买回来的ORION 6" F5 牛反,当时考虑到原来那部牛反要拍再多些深空，计划是大半年后使用,
今天突然想换,便做了个连接部位,把它安装好，正式启用。
这是我的第二部天文望远镜,很可能会是最后一部,我希望会一直够我用下去。



MANDII
年初三（2011）

US ASTRONOMY

samgray1 : Yesterday, 12:03 AM from San Diego, Calif., USA
It looks good Mandii.


Uncle Peter Yesterday, 01:34 AM from Toronto, Ontario
Nice set-up Mandii and great shot of M50.

What kind of mount are you using for your 6" Orion? It looks like an EQ mount, but I'm not sure which one it is.



MANDII : Today, 09:47 AM
Yes, it's the "智通"EQ3 made in China ,with one motor , no goto and guiding .
A new one is selling several hundreds Hong Kong Dollars in the market .
It carry up around 10KG things on a normal star tracking , I think .
I had used it nearly 1 year with my 4" Newtonian without complaint on it's perfomance in such good price .And now , it's going on the tough hunting task with this newly installed 6" newtonian .
So far so good , within my estimation when I decided to bring it home last year .



中国牧夫

louww :2011-2-5 20:30
用那个双筒镜的时候，空间是不是有点小啊？!

MANDII : 2011-2-6 00:15
双筒镜最近才重新开始用,偶尔看看，还行吧空间,用单筒拍摄时把双筒放一边，坐在里面看双筒挺舒适的感觉。

US ASTRONOMY



sxinias : Today, 12:23 PM from Sxinias Marathon Greece
Mandii,

Congratulations on getting your 6 inch telescope in operation. You are doing some good work without sophisicated equipment. Have you had the opportunity to accurately polar align your mount?

Joe



MANDII : Today, 02:56 PM

Dear JOE ,

The day of 5th Feb , I setup this scope .
On the same night , I did polar alighment by Drifting method , and took the picture of M50 & NGC3242 .
Polar alighment is always important . In my situation , it helps me to find the object efficiently ,accuratly ,and helps to track the object during the imaging process . To explain this two points indepth , it can be too much to say .
For this time , I want to say something about how I do the polar aligment , find the object , and track the object into pictures . It's my first time to explain this in this forunm , in English .

I did the drifting not by naked eye with eyepieces .It's done on a computer screen by inserting the camera(DSI-I) . The EQ3 mount is turned the polar at the same time when I look at the star moving-discrepancy from the screen . The more exposure time taken in a single flame , the more discrepancy( star tails) we can see from the screen . And then adjust(polar align ) the mount to reduce the discrepancy .

2ndly , if the mount is not aligned well , I can't find the DSO objects properly .
Actually , I am not free-finding the objects , like the star-hooking inside the eyepiece .
Becasue star-hooking is difficlut in my case , there is not much stars in the View finder. The FOV in an eyepiece(25mm eyepiece ) is so small( less than 1 degree) , and the star positions is always rotated to some degrees in a Newtonian scope , it's not fully inverted as the normal refractors do . So you cannot easily recognise those stars in a mean time , when you are looking at the the star-chat at the same timming. In summary speaking , It's very hard to find the object .
Indeed , I was usually using the numeric calibration ( RA and DEC scales ) on the mount . I turns the RA axis according to the time angle of an object ,meaning the RA value the object is located at the time it is observed . Let say this moment the object is located at time-angle 22h10m , the next hour it will move to position 23h10m . The time angle is very looks like to the RA value of an object , but it's changing with time and RA is fixed . After the mount's RA axis is rotated well , I turns the DEC axis to the DEC value of that object , this is traight forward because the DEC of an object is always fixed whenever any time is concerned .
THE ABOVE METHOD TO FIND AN OBJECT , I PERSONALLY CALLED THE " MANUAL GOTO" , it's similar to electronic GOTO , but using your own hand . If the mount is not aligned well, I can't see the objects within the FOV . This time , I can see the M50 and NGC3242 within the eyepiece FOV , by just one time turning of the RA and DEC aixs . It's located not really at centre , but within the area of the FOV .



3rdly , the polar alignment is aimed to star tracking in imaging .
My tracking this time was 1 minute single exposure , for total 10-20 minutes .



BR
MANDII

中国牧夫

三味_jim : 2011-2-7 15:25
資金啊。。。只能等將來了


MANDII : 2011-2-7 16:17
年初三当晚拍的,赶新年新镜开光日 !
谢谢大家观看,哈!

US ASTRONOMY


dmbryan : Yesterday, 11:56 PM from b'ham alabama
Looks like a nice setup there. Congratulations.


Lenbo : Today, 01:05 AM from Cochranville Pa.
Looking good MANDII. Great use of your available resources. You've come a long way.


PBalu : Today, 01:14 AM from Bloomington, Indiana
Nice work Mandii. I like your observatory too.

中国牧夫

sunyuanzhen : 2011-2-10 11:59

村屋就是好啊。以前在大埔住的时候那个天，随便一看就是一大堆星星啊~ 羡慕一下楼主的天文台~



MANDII : 2011-2-10 17:07
原来系自己友 , 多谢 !
新年快乐!



US ASTRONOMY

Uncle Peter : Yesterday, 10:42 PM from Toronto, Ontario
Ah I see, thanks Mandii!

今日2011年正月初八 !
本贴于中国牧夫,以一贴之多,重登热门主题的榜首位置! 哈哈!!
上次榜首的时间是2010年10月15日.

谢谢大家,Thank YOU !!

小弟不是很清楚：
大大一直把別處論壇對大大的恭維 辛辛苦苦搬到這裡來的目的是啥?
 ::)
至少小弟對於貴台的進展或哈拉打屁的興趣 甚於馬屁
 ;D

我的所有贴子，一向都是从各个地方（中港台，外国）合拼的，而且同步更新，任何人在任何论坛对我的贴所说的东西，
都会在其它论坛同样看到，同步作记录，任何一篇都是那样，从一开始。
美国的英文也会在中港台的论坛里记录，因为很多人会看英文。
只可是中文的没有放到美国论坛里，因为大部份外国人不会看。
比如这个台湾论坛里的人说的，有的也会在中港论坛里都看到。
这是一种日记性质的贴，每个人的一言一语，不管是那个地方的，都会被记录被共享。
那为何要这样做呢 ？
一个我个人觉得很有意思，还有就是我的每张贴都要计算点激数的，写越多点数越多，每月点数有多有小，
点数是很重要的一个数，论坛就是要看点数，不然写那么多干麻是不是？而点数只有在HK论坛里统计所有地区。
就因为这个点数对我很重要，加上自己很多时也没什么东西好写了，因此就要把人家说的也写到贴上，
使内容更多，点数更多。

今日下雨天,在天文台里自制双筒支架,使原来的10X50双筒可与目前6"ORION牛反合拼用，
而不用分开用另一个相机脚架 。这样做主要是为了能节省空间以利双筒目视观察。
我以前很喜欢用双筒看星的，一直都想在现有的望远镜里加双筒。
把双筒接到赤道仪上，和牛反平行，会有好多好处，能看能拍能方便寻星（正像），比寻星镜还好用。
接个目镜后拍摄用万能架和数码相机便可拍摄了。加上赤道仪的电跟，有利长时间爆光拍摄。
而且用了T型架，双筒可以相应旋转视野(图DSC00143)，使观察者的头不用倾侧来看。
我今天试了观看各个不同部位的经筒指向了，感觉不错，舒适。
10X50双筒（10X）的视角是6度“正像”，750mm牛反用25mm目镜（30X）的视角是1度多左右“倾侧像”。
6X30寻星镜的视角最大，有差不多9度“正倒像”。


2011/02/13
MANDII

中国牧夫

wx1980112： 2011-2-12 10:17
当年鬼子打过来的时候 要是家家有这个 抗日战争还能提前4年结束哦


mfx ： 2011-2-13 18:51
在HK 在这个小屋子里 很热阿!

MANDII ：2011-2-13 22:04
不热,你如果有追我之前贴上写的报告就知道了。
砖墙涂了特制的隔热防晒涂料的，一年会感觉热的天时也就7月和8月倆个月，
有几次下午35度时都试过了，里面还阴阴凉凉的。
隔热本来就是这工程的主要目标，因为我白天还要用的，上网打游戏什么的。不只晚上看星。你要是有看我山上树木拍摄照片，在另一张贴里，很多都是白天或夏天午后进行的。

US ASTRONOMY


MANDII : 02-14-2011, 10:57 PM

Today I combine my 10X50 binocula with the 6" ORION newtonian , I had long time no use my binocula .
In the past time , I enjoyed looking at stars through a binocula . So I want to keep it and continue such good visual habbit .
It is connected to the EQ3 mount , parallel to the Orion Newtonian . With the use of a T-shaped connector, It can be adjusted the angle such that it is horizontally parallel to my eyes ( pic DSC00143) when the telescope is pointed to different directions . I tested views in different direction , my head and my neck is comfortable when I am looking through the binocula .
Moreover , using binocula can help me find the stars/DSO more easily , better than a view finder . By connecting to EQ3 , I can even do some simple afocal imaging with the use of a digital camera that is holded behind the binocula eyepiece . That kind of imaging can have longer exposure with EQ3 mount .


Clear skies

2011/02/14
MANDII




Uncle Peter : Yesterday, 06:53 AM from Toronto, Ontario

Mandii, this set-up keeps getting better and better. I've always wanted to piggyback my binocs with my scope, but I never got around to it. Great Job!


jenniferchristine : Yesterday, 09:59 AM from Brisbane Qld Australia
All looking very sweet.
You have done well.
The pictures you took look a little out of focus - I expect you'll soon cure that problem.
Then you'll be taking some very good photos.


PBalu : Today, 01:12 AM from Bloomington, Indiana

Nice Work Mandii. I like that idea!!!



CLOUDY NIGHTS

mexjon : 02/14/11 10:23 AM from Jacksonville, FL- Merida Yucat...

Love it MANDII! What a great idea especially the part about being able to change the binocular's position when the scope changes angles. Great job!


MANDII : 02/16/11 08:19 PM
Thank you .


中国牧夫

djj011 : 2011-2-14 18:23
楼主乃吾等之楷模


xmxoxo: 2011-2-14 23:50
LZ的专业之处在于，有目的，有想法，有计划,能实施，还能“持续高烧”


swkcl : 2011-2-15 21:39
我家要是在乡下就好了啊！


mfx:2011-2-17 09:29
DIY精神 不死！向你学习！

moved .

本来之前贴里早于3月29日写好关档的, 不再更新，现在觉得还是把这根铁柱记录好档案。



这铁柱上倆星期前自己设计清楚，画好量好图给深圳订造,费用一共才三百块，包上颜色，还连双筒的支架也给我免费搞好一个，其间完全不用我费心，这样的服务实在找不到别的地方了。前几天假期我一个人便到深圳把它拉回来香港 ，就那样把底铁盘上几根暴炸罗丝于地板上，便OK了，效果我非常满意。那天搞好的时间便顺便用手机照几张留档。

设计理念：
1.铁柱能高底调节，水平调节，适合不同赤道仪时作高底调整，太高太底都不行,目前调一定高度时能使赤道仪的极望看到北极星。

2.铁柱在天文台里固定的位置是要使赤道仪的纬轴（望远镜的中间）的中心点与圆顶的中心点对齐，而并不是铁柱放在圆顶的中心点正下面。因为有6公分之差,那样才能使望远镜有较大的活动空间,这点以前用脚架时发现的。

3.铁柱顶盘要能拆,不能焊死,因应日后不同赤道仪时只要把顶盘拿去改下罗丝的孔位,便能方便更换不同赤道仪使用。

4.铁柱中间空心,目前放沙填满,以减少微震。



MANDII
记于 2011/04/29

基座凸出建議裁短~~雙螺栓加雙螺帽

堅固與安全性增加

谢谢Jeff 兄的一些意见。  :)
基坐目前是倆块30公分X30公分尺寸的铁盘,厚0.8公分每块，原意搞大点柱子就比较站得稳，而且特意要做成正方型，因为镜子摆动时上面整个器材的重心不在柱子正中间的，而且日后也有可能会使用更重的赤道仪和望远镜，因此当初不放心就4根爆炸罗丝固定地板会不够力，就告诉厂家搞大点底盘，一定要那么大的尺寸。那样一来，当时在电话里也无法想像到凸出的地方也是比较多，不过现在用了一段时间感觉还好也不怎么占地方，毕竟室内也有接近2米2直径的空间，而且一般观察时脚底是放在盘上面。另你看到的那4根1.5公分又大又长的罗丝每根都有上下倆个罗帽和介子钳住上层的那块底盘，大罗丝就焊死下层底盘,下层底盘就4根爆炸罗丝固定到地板上,那样柱子才可以调节高度，也是正如你所说的用倆个罗帽比较坚固。

《台湾论坛主要发表文章导引》   



器材篇    
1.自制家用天文台 --- MANDII ( HONG KONG )
http://familystar.org.tw/component/option,com_smf/Itemid,45/topic,8267.0

2. 人肉GOTO坐标法 和 PC屏幕位置微调法 寻找暗深空天体
http://familystar.org.tw/component/option,com_smf/Itemid,45/topic,9221.0

3.用主镜对极,漂移和跟踪的问题
http://familystar.org.tw/component/option,com_smf/Itemid,45/topic,9416.0

4.怎样人手导星的 ?
http://familystar.org.tw/component/option,com_smf/Itemid,45/topic,9385.0

5.倆支牛反合拼用
http://familystar.org.tw/component/option,com_smf/Itemid,45/topic,8511.0

6.508mm 镜片/F4 大牛 配EQ3赤道仪 摄星计划 正式启动 !!!
http://familystar.org.tw/component/option,com_smf/Itemid,45/topic,9748.0



观察拍摄篇( 不定期持续更新观察照片和记录报告。2009年12月起,预定二十年不变 )    

天文观察雜记
i) 台湾亲子 http://familystar.org.tw/component/option,com_smf/Itemid,45/topic,9825.0
ii) 台湾数位男女 http://bbs.mychat.to/reads.php?tid=901873

月面欣赏和觀察
i) 台湾亲子 http://familystar.org.tw/component/option,com_smf/Itemid,45/topic,9826.0
ii) 台湾数位男女 http://bbs.mychat.to/reads.php?tid=901956

天望坐标式追踪,观察山上的 [果实,鸟巢 ,密蜂巢和奇花异草]
i) 台湾亲子 http://familystar.org.tw/component/option,com_smf/Itemid,45/topic,9827.0
ii) 台湾数位男女 http://bbs.mychat.to/reads.php?tid=901959









MANDII/林月笙 ( HONG KONG )
建档: 公元2010年06月29日
关档:       2011年07月15日

本来这张贴早已写完不想再加,不过今天这个相簿非常重要,我以前没想到这个相簿也要记到這里 !


這是我的天文相簿,从第一张2009年7月22日香港日蚀的那天记到现在,那也是我开始玩天文的时候,已3年半，目前一共515张。 记录整个建造天文台的起始构思设计(手画图纸)，施工以及完成经过。往后的器材使用改造，和觀察照片记录。 每有更新，都会拍照记下。

我的业余天文生涯中，做的最正确最好的一个決定，就是在自家楼顶建了這个天文台。


http://user.qzone.qq.com/550477353/photo/4c4caa85-3eac-47e8-8f8d-cec35e63e291/


MANDII
2012/12/15

更新天文台的近況

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