親子觀星會

(http://www.pocketrubbish.com/ap/wp-content/uploads/2011/08/m31processed_filtered-600x374.jpg)

Image Location and Date: Tierra Del Sol (SDAA Dark Site) on August 30th, 2011
Object: M31 Andromeda Galaxy
Mount: CG5GT
Imaging scope: 300mm Tair-3c lens
Imaging FL: 300mm
Imaging focal ratio: f5.6
Imaging camera: Modified Canon 350D
Lights: 55 x 300sec @ ISO 800 (4 Hour 35 Minutes)
Calibration: Darks
Guide scope: Antares 8×50mm finder with Orion StarShoot Auto Guider
Other details: guiding with PHD, captured with APT, stacked in Deep Sky Stacker and processed in Fits Liberator + Photoshop.

http://www.pocketrubbish.com/ap/?p=262

300mm. f/5.6 拍 4 個小時......
那我的 F2.8 拍2小時應該也差不多這樣囉   ;D

誇張...@@"

拼了~拼了~

不對喔, 5.6/2.8=2,  2^2=4,  所以技安大拍1小時就OK了, 當然你要是拍2小時, 那只會讚更多  ;D

1小時?實際上不是這樣....
原因勒自己當習作拍拍看就知道
不知道再問

你要挑戰的是這一張

(http://www.astropix.com/IMAGES/SHOW_DIG/M31_Andromeda_Galaxy.JPG)
 ;D

Lens: Canon 300mm f/2.8 L USM IS telephoto lens
F/stop: f/2.8
Exposure: Composite of 57 frames, each 2 minutes long for a total of 114 minutes exposure
Mount: Polar-aligned tracking equatorial mount, auto-guided
Camera: Canon EOS 20Da DSLR
Mode: Raw
ISO: 1600
White Balance: Daylight
In-Camera Noise Reduction: Off
Filter: IDAS LPS
Temp: 52F
Time 9:22 PM EDT
Date September 27, 2005
Location: Scott's Pitt, NJ
Calibration: Darks: 16 x 2 min dark frames averaged together as a master dark. Auto-dark calibrated each light frame in Images Plus v2.75beta. No Flats, no bias.
Processing: Automatic Image Set Processing in Images Plus v2.75 where all light CR2 raw files were converted to 16-bit linear TIFF files with No White Balance, Color Filter Array as the white balance type, then calibrated with the master dark. The light frames were then Bayer interpolated to convert them to color images. The light frames were then registered and aligned in Images Plus. The light frames were then composited together and "stacked" in Images Plus using min-max excluded as the method. Digital Development was then applied to this 16-bit linear master light file. The image was corrected for vignetting with GradientXTerminator. Color balance was then adjusted with levels and curves modifications. Color saturation was increased. A high-pass filtered copy of the background layer was blended via lighten mode in Photoshop CS2. Noise Ninja was used to reduce noise in the image.

http://www.astropix.com/HTML/SHOW_DIG/M31_Andromeda_Galaxy.HTM

對ㄏㄡ......平方比  ;D

拼拼看才知道啦！因為我那張在五分山拍的也有 50 分鐘ㄝ！不過是在水霧之中強拍的.......差好多   ::)
差2000 米真的差很大，上山才是王道 ........   :P

我會努力的........... :)


熊熊的想到古早的這一篇：
http://familystar.org.tw/component/option,com_smf/Itemid,45/topic,1448.msg17586#msg17586


那個時候用的是400D還沒改機，qhy5也剛剛入手沒多少還在摸鎖，
雖然知道有dark、平場這些東西但是完全沒概念..........

年輕啊..........

星空拍得很棒ㄝ, 可惜葵花寶典已經失傳了...

水哦...
我記得沒錯的話，首頁的背景就是這張 M31 ;D

星空 你也是用300mm. 拍的嗎?

怎沒聽過你有300 的鏡頭?  ;D

http://familystar.org.tw/component/option,com_smf/Itemid,45/topic,1448.msg17586#msg17586
這篇下面第一個回的人是誰... ;D

請看第一頁的拍攝數據
http://familystar.org.tw/component/option,com_smf/Itemid,45/topic,1448.0

呵呵呵！翻回頭他首篇有看到了！   ;D

aa 你不是也有一支300 的鏡頭，都沒太出來玩玩看！     :D

對啊..
我之前就是看了這篇去敗了一支
http://bbs.mychat.to/reads.php?tid=904202&keyword=tair

(http://bbs.mychat.to/attach/Fid_487/487_724105.jpg)
 ;D

2月的時候有帶去翠峰裝水

http://bbs.mychat.to/reads.php?tid=910004&keyword=%E7%BF%A0%E5%B3%B0

(http://bbs.mychat.to/attach/Fid_487/487_733934.jpg)

那隻我已經買很久了，當初在yahoo買的，本來想找蔡頭的，
但是這幾年被炒的太高，正好看到有人丟而且不貴就買了，
真要講的話我用那隻拍的還比較多~~


還不只，那隻鏡還到過澳洲、去過上海、還跟著我一起環島~~~ ;)

真是身經百戰.. ;D

來人~~~居然challenge國師, 推出去X了  ;D

身經百戰要加這個.............  ;D ;D ;D

 擊墜章 10 玫
(http://pic.pimg.tw/la817291/1d292f6549b2a06132a03ee7cdaa5aae.jpg)

一代名機F-86軍刀機～機鼻黑黑的是瞄準雷達
http://zh.wikipedia.org/zh-hant/F-86%E8%BB%8D%E5%88%80%E6%88%B0%E9%AC%A5%E6%A9%9F (http://zh.wikipedia.org/zh-hant/F-86%E8%BB%8D%E5%88%80%E6%88%B0%E9%AC%A5%E6%A9%9F)

F-86  VS  MIG-15
(http://acepilots.com/planes/Dogfighters_Series_3_Part_2_by_WS_Clave.jpg)

星空你要小心了... ;D

其實這篇的重點是..
只要善用手邊的鏡頭，加上大家的相互學習
大家都會有好的作品
不用一味著去追求高貴的鏡頭

雖然一分錢一分貨
不過便宜的鏡頭也有不錯的

像 Hata 那支 Orion VX102ED 就很不錯