Astronomical ISO test (lots of comments!)

Started Jan 29, 2013 | Discussions thread
just Tony
Contributing MemberPosts: 864Gear list
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Lumicon Minus Violet filter?
In reply to Trollmann, Feb 6, 2013

This could knock out quite a bit of that blue fringe.

http://www.lumicon.com/store/c/36-Minus-Violet-Filters.aspx

The Zeiss 100mm at f/4 wouldn't mind looking through a 72mm diameter filter.

 just Tony's gear list:just Tony's gear list
Nikon D800 Nikon D810 Nikon AF-S Nikkor 16-35mm f/4G ED VR Nikon AF-S Nikkor 300mm f/2.8G ED VR II Nikon PC-E Micro-Nikkor 85mm f/2.8D +3 more
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