NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2010 Jul 5, 16:03 -0700
George,
See the linked graph images of 50mm and 100mm lens moa/px vs. px. I have hand drawn highlighted curves over the linear red lines for direct visual comparison. The maximum discrepancy for the 50mm lens calculates out to 0.35' moa at 3500 pixels. The maximim discrepancy for the 100mm lens calculates out to 0.24' moa also at 3500 pixels. Chasing tenths of a minute of arc by graph or formula won't add much utility for conventional CN applications. If a photographer were trying to shoot a day time lunar then every tenth of a moa would be important. Photographing a sharp crescent Moon 24� from the Sun may not be possible. I'll have to give it a try.
Greg Rudzinski
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