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赤道儀 攝星儀 架相機鏡頭+鏡頭拍星空的圖
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« 回覆文章 #30 於: 2015-08-14 07:44:56 »

奇怪 視野中央的色散和彗像差 怎麼比周邊的還慘呢??
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« 回覆文章 #31 於: 2016-10-27 14:52:56 »


討論相機鏡頭拍星空
Tamron 28-75 f2.8 for night sky shooting? anyone?
https://www.dpreview.com/forums/post/55074813

Sigma 20mm 1.4 art vs nikon 14-24
https://www.dpreview.com/forums/post/58493310

nikon 200mm
https://www.dpreview.com/forums/post/58460558

Best Lenses for Milky Way Photography: Canon Astrophotographers .
http://www.lonelyspeck.com/best-lenses-for-milky-way-photography-canon/


Best Lenses for Milky Way Photography: Nikon Astrophotographers
http://www.lonelyspeck.com/best-lenses-for-milky-way-photography-nikon/

SIGMA 17-70mm f/2.8-4.5 - AstroBin
http://www.astrobin.com/gear/3264/sigma-17-70mm-f28-45/


https://www.dpreview.com/forums/thread/3655471
Nikon 16-35mm, 17-35mm, or 28mm 


Nikon D600 Astrophotography - Tamron 24-70mm F2.8 - YouTube
https://www.youtube.com/watch?v=GnOYk44zJ4k

How-To: Picking a Great Lens for Milky Way Photography
http://petapixel.com/2014/01/29/picking-great-lens-milky-way-photography/

24-70mm f2.8 for astrophotography?
https://www.reddit.com/r/photography/comments/43yxvd/anyone_use_2470mm_f28_for_astrophotography/


===


Astrophotography Without a Telescope - Randombio
http://www.astropix.com/HTML/I_ASTROP/LENSES.HTM
Canon Lenses for Astrophotography

The following lenses and astrophotographic performance descriptions apply to APS-sized 1.3x, 1.5x and 1.6x crop-factor sensors. In general, lens performance in the corners degrades as the sensor size gets larger.

    Canon EF-S 10-22mm f/3.5 - 4.5 USM ($820) - ok wide open, better stopped down 1 stop
    Canon EF 15mm f/2.8 ($650) - good at f/4
    Canon EF 16mm-35mm f/2.8 L II USM Zoom ($1,580) - ok at f/2.8, better at f/4.5
    Canon EF-S 18mm-55mm f/3.5 - 5.6 IS Zoom ($175) - ok wide open at all focal lengths, better when stopped down one stop
    Canon EF 17mm-40mm f/4 L USM Zoom ($800) - ok at f/4, very good at f/5.6
    Canon EF 24-105mm f/4 L USM IS Zoom ($1,100) - ok at f/4, very good at f/5.6
    Canon EF 24mm f/1.4 II L USM ($1,700) - ok at f/3.5, good at f/4.5
    Canon EF 28mm f/1.8 USM ($485) - ok at f/3.5, good at f/4.5
    Canon EF 35mm f/2 ($310) - ok at f/3.5, good at f/4.5
    Canon EF 50mm f/1.4 USM ($400) - ok at f/3.5 good at f/4.5
    Canon EF 50mm f/1.8 II ($125) - ok at f/3.5, good at f/4.5
    Canon EF 85mm f/1.8 USM ($400) - ok at f/2.8, good at f/4
    Canon EF 85mm f/1.2 L II USM ($2,100) - good at f/2.8, very good at f/4
    Canon EF 100mm f/2 USM ($475) - good at f/2.8, very good at f/4
    Canon EF 100mm f/2.8 USM Macro ($570) - good at f/2.8, very good at f/4
    Canon EF 135mm f/2 L USM ($1,035) - good at f/2.8, very good at f/4
    Canon EF 200mm f/2.8 L II USM ($780) - good at f/2.8, very good at f/4
    Canon EF 300mm f/4 L USM non-IS - ok at f/4, good at f/5.6
    Canon EF 400mm f/5.6 L USM non-IS $1,275 - ok at f/5.6, better at f/6


Older Canon Lenses

Canon made some fine manual-focus lenses, such as the R, FL, and FD series, for their film cameras before they came out with the EOS system and auto-focus. Unfortunately, these lenses can't really be used on the new auto-focus EF camera bodies for astrophotography.

When Canon redesigned their cameras and lenses for autofocus, they changed the distance from the lens flange to the sensor. Older FD lenses have a register (flange to sensor distance) of 42 mm. Modern EOS lenses have a register of 44 mm. That means that for infinity focus, older lenses come to a focus 2mm in front of the sensor. This is not a good thing for astrophotography!

The older FD lenses can not be used at infinity on an EOS body unless an adapter with an optical transfer lens is used. This usually degrades the performance of the lens enough to be undesirable for astrophotography. So basically, you don't want to use older Canon FD lenses on EOS EF bodies for astrophotography. But if you have one of these rare Canon optical adapters, you can certainly try it! There are also some third party optical adapters to use older FD lenses on new auto-focus bodies, but they are of poor optical quality.


Nikon Lenses for astrophotography

Nikon is proud that they have not changed their lens mount, and have maintained backwards compatibility with older Nikon lenses with the newest Nikon camera bodies.

You can also use Nikon lenses on Canon EOS EF lens-mount bodies. This is because the register distance on a Nikon is 46.5 mm, so there is room for a simple mechanical adapter between a Nikon lens and a Canon EOS body. An excellent quality, inexpensive adapter is available from Fotodiox.com for $28 on the internet. They also offer many other adapters to use different lenses on different camera bodies. Nikon lenses used on Canon bodies require manual focus and must be stopped down for metering, but these two drawbacks are not important for astrophotography.

    Nikon AF-S 14-24mm f/2.8G ED AF Lens ($1,785) ok at f/2.8, very good at f/4
    Nikon AF Nikkor 16mm f/2.8 D ($900) - soft corners and coma at f/2.8, OK at f/4.5
    Nikon AF Nikkor 35mm f/2.0 D ($360) - coma at f/3.5, good at f/4.5
    Nikon AF Nikkor 50mm f/1.8 D ($125) - ok at f/3.5, good at f/4.5
    Nikon AF Nikkor 50mm f/1.4 D ($330) - ok at f/3.5, good at f/4.5
    Nikon AF Nikkor 85mm f/1.4 D IF ($1,175) - bad coma at f/1.4, good at f/4
    Nikon AF Nikkor 85mm f/1.8 D ($430) - ok at f/2.8, good at f/4
    Nikon AF DC Nikkor 135mm f/2.0 D ($1,350) - ok at f/2.8, good at f/4
    Nikkor AF 180mm f/2.8 D ED-IF ($850) - good at f/2.8, very good at f/4


Other Manufacturers

Third-party manufacturers, such as Sigma and Tokina, also make lenses in the Nikon F and Canon EF lens mounts. These lenses are less expensive, but usually not quite as good. Quality control seems to be the major problem with third party manufacturers so individual samples of lenses can vary. Test them if you can before you buy them.

Sigma, in particular, has a decent reputation for making some lenses that are good for astrophotography on a budget. In particular these specific lenses are recommended for astrophotography:

    Sigma Fisheye 8mm f/3.5 EX DG Circular Fisheye $900 - for Canon, for Nikon
    Sigma 20 f/1.8 EX DG $630 - for Canon, for Nikon
    Sigma 28mm f/1.8 EX DG $450 - for Canon, for Nikon
    Sigma 105/2.8 EX DG $479 - for Canon, for Nikon
    Sigma Apo 150mm F2.8 EX DG HSM Macro $729 - for Canon, for Nikon




« 最後編輯時間: 2016-10-27 14:59:47 由 peter » 已記錄

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« 回覆文章 #32 於: 2016-10-27 15:01:56 »

http://www.randombio.com/astrophotography-without-a-telescope.html

Coma distortion at the edge of a 35-mm f/1.8 lens at different apertures.

一般要縮光圈 才能改善
特別是老相機鏡頭  . 如果廣角 因星點小可能不縮還好 但是如何 200mm 300mm 拍出來  會藍色星星紫邊嚴重
 須要候製或是縮光圈 .

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« 回覆文章 #33 於: 2016-10-27 17:37:31 »


google

星景攝影經驗分享 - 網路天文館
tamweb.tam.gov.tw/v3/attach/File/no62/no62p40-47.pdf
 
全片幅相機常用到星景攝影的鏡頭
有Nikon   14~24mm F2.8G、  Nikon 14mm F1.4D,

 Canon  15mm F2.8對角魚眼、Canon16~35mm F2.8L USM、Canon 24mm F1.4L
 以及  SIGMA 15mm F2.8 對角魚眼等。
其他像Nikon 20mm/24mm/28mm  F2.8D鏡、
   Canon 24mm/28mm F2.8EF鏡、
  各廠24~70mm F2.8或SIGMA 20mm/24mm/28mm  F1.8EX都可以拍攝星景攝影,
 但光圈開到F2.8用在全片幅,週邊成像效果就是明顯差一些。

APS片幅等級的相機,可以使用Nikon/ Canon 17~55mm F2.8;
   副廠的騰龍 17~50mm F2.8    與SIGMA 18~50mm 2.8, 
  其實也都提供還不錯的 成像品質。上列鏡頭多半可以使用光圈F2.8拍 攝,還能得到中上的成像品質,拍照時(尤其是
使用變焦鏡頭),須額外注意變焦環或對焦環(非 IF對焦)是否會滑動,如發生此情形

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« 回覆文章 #34 於: 2016-11-07 18:31:53 »



===
Steve Ang

Sigma ART 20mm f/1.4 DG HSM。

https://www.flickr.com/photos/stevegx0817/30797860236/in/dateposted-public/lightbox/

« 最後編輯時間: 2016-11-08 07:31:58 由 peter » 已記錄

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« 回覆文章 #35 於: 2016-11-08 07:29:26 »

BY  SKYRAY SA  +鏡頭
https://www.facebook.com/photo.php?fbid=10155428544819278&set=pcb.10155428545194278&type=3&theater




===
BY  Orcus Tseng
SA 無導星 + 60d改 + 100-400L一代400端
ISO3200 light : 31*120sec + dark*5 + flat*8


==
Steve Ang 
單張曝光60秒,測試看看5DSR不改機的成像精細度。

2016/11/05 攝於合歡山昆陽。
5DSR,Canon EF70-200mm F4 L。
Star Adventurer攝星儀自由追蹤。
ISO4000,F4,60s。
----------------------------------------------------------------
清晰大圖請參閱Flickr:  https://www.flickr.com/photos/stevegx0817/30195485623/in/dateposted-public/lightbox/

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« 回覆文章 #36 於: 2016-11-08 07:32:21 »

前些天保2 拍    
sigma 24-70mm 無限遠要回轉很多 , canon 一般 回轉一些些 . 想不到 sigma 要回轉比較多.


FOX 確定過 T11-16mm
 有些 無限遠無法回調 , 一直以為 canon 微調不好但是 FOX 說要熱漲冷縮 , 所以某些 T11-16mm 會有這問題 .

sigma 24-70 f2.8
« 最後編輯時間: 2020-01-02 11:46:22 由 peter » 已記錄

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« 回覆文章 #37 於: 2016-11-08 18:01:47 »

https://www.flickr.com/photos/stevegx0817/30764228361/in/dateposted-public/lightbox/
轉貼下

Steve Ang 在藍色高興的星空相簿中新增了 1 張相片。
5小時 ·

【仙女與三角】
因爲拍攝當晚沒有帶自身常用的300mm定焦,所以跟同行好友借了他的小小白70-200拍攝。尋找仙女座大星系的時候才發現,原來70端可以同時拍到仙女座大星系和三角座星系啊!

2016/11/05 攝於合歡山昆陽。
5DSR,Canon EF70-200mm F4 L。
Star Adventurer攝星儀自由追蹤。
ISO4000,F4,單張60s。

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« 回覆文章 #38 於: 2016-11-09 11:48:15 »

FROM FACEBOOK


https://www.facebook.com/photo.php?fbid=10211392165701544&set=gm.995678317244589&type=3&theater

Orcus Tseng‎星空探索機-Star Adventurer拍星趣
10 小時在 Taipei 台北市附近 ·
 
抱歉貼了又刪又貼的...不知為何FB一直不讓我翻轉影像
2016/11/04 IC 2118 Witch Head Nebula
SA 無導星 + 60d改 + 100-400L一代400端
ISO3200 light : 20*120sec + dark*5 + flat*8
這張就有被風影響到,超過1/3的影像因為晃動無法疊合,也驗證了調照片的時候螢幕很重要,第一次調完用螢幕看很OK但到手機上就很暗淡.
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« 回覆文章 #39 於: 2016-11-09 15:01:25 »

from 甘醫生facebook

小甘拍攝的御夫座週邊星野,這區是冬季夜空中的另一個主角啊!

6D(MOD)+Tamron 2470@65mm, f4.0, ISO 1600, 2h00m(3*40)

https://www.facebook.com/photo.php?fbid=1120395158081455&set=a.103821636405484.4761.100003329437162&type=3&theater

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« 回覆文章 #40 於: 2016-11-12 19:26:24 »


宗仁兄
https://www.facebook.com/photo.php?fbid=10206364612789265&set=a.10206323091951270.1073741979.1685936272&type=3&theater
攝星儀:飛鏢TT20X-AG + 重捶組
相機:Canon EOS 500D (改杭澄鏡片)
鏡頭:Canon 35-350 L (200端) F5



https://www.facebook.com/photo.php?fbid=10206364790073697&set=a.10206323091951270.1073741979.1685936272&type=3&theater
攝星儀:飛鏢TT20X-AG + 重捶組
相機:Canon EOS 500D (改杭澄鏡片)
鏡頭:Canon 35-350 L (350端) F4
ISO 3200
2mins*18 = 36 mins + Dark
DSS疊合 PS處理
20161105 合歡山昆陽 1c 濕度40-60%
« 最後編輯時間: 2016-11-12 19:33:49 由 peter » 已記錄

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何影
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« 回覆文章 #41 於: 2016-11-12 21:16:30 »

我也來插花
https://www.flickr.com/photos/141588149@N04/30133366524/in/album-72157667780434006/

總曝光時間95分鐘,暗場 10張,平場18張
使用器材
Canon EF 200mm F2.8 使用光圈F3.5 + Canon 500d(改) + Eq6 導星追蹤
 攝於大雪山50K 停車場
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« 回覆文章 #42 於: 2016-11-12 21:23:06 »

https://www.flickr.com/photos/141588149@N04/30130870103/in/album-72157667780434006/

總曝光時間105分鐘,暗場 10張,平場18張
使用器材
Canon EF 200mm F2.8 使用光圈F3.5 + Canon 500d(改) + Eq6 導星追蹤
 攝於大雪山50K 停車場
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« 回覆文章 #43 於: 2016-11-14 18:57:33 »

肉叔

 70MM

巴納德環

AstroTrac TT320X 飛鏢攝星儀
Canon 70-200mm F4 小小白
自由追蹤無導星
Canon 1000D(改)
拍攝 3min*32張 ISO1600
無暗場、無平場
地點 昆陽
日期 2016.11.6(日)


https://www.facebook.com/photo.php?fbid=10207816362903379&set=a.2428451267028.2111494.1123971202&type=3&theater&notif_t=photo_reply&notif_id=1479110720184332

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« 回覆文章 #44 於: 2016-12-21 10:42:34 »

http://familystar.org.tw/content/view/256/105/
不同焦段鏡頭拍的銀河中天體    列印    E-mail
作者 阿炫   

==

https://www.facebook.com/eric.kan.75?fref=ts

甘醫生 
Tamron 15-30,
f2.8

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