M81 & M82 thru Starviewer 80ED with Borg 0.85x focal red

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intaneoptics
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註冊時間: 週三 04 6月, 2008 08:02
來自: 南京英田光學

M81 & M82 thru Starviewer 80ED with Borg 0.85x focal red

文章 intaneoptics » 週三 30 7月, 2008 14:07

Time: At 0:00 Jan.3rd,2008
Location: Hui Dong, GuangDong, China
Photographer: Wei Huang
Refractor:Intane Starviewer 80ED
Mount: Vixen Sphinx SXW
Camera: Canon 350D Baader IR Filter Modified
Guide: Mizar GT68(D=68mm,f=600mm)+ Vixen GA4+ Mizar Or6
Exposure: ISO1600 composite of 18 300s
Dark frames:8 frames
Processing: Aligned in Maxim DL, processed in Photoshop(Level and gamma adjust, curve adjust )
Weather : Clearness, Transparency fine.
Naked eye limiting magnitude: 6

Please note:
1. The second picture was cut form the first one then enlarged.
2. Borg 0.85X field flattener/focal reducer also did a fantastic job. It makes the shooting flatter. :lol:

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