NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2010 Sep 23, 10:13 -0700
The attached image shows the Jupiter Lunar cropped and edited. It was necessary to filter the Moon with double polarizers held out at arms length so that the Moon would be covered but not Jupiter. The ISO 1600 setting combined with an aperture of F4 blurs the limbs of the Moon which induces a 2 or 3 pixel scatter (0.8' to 1.2'). Jupiter is blurred as well but can be bisected accurately to determine it's center. A shutter speed of 1/200 of a second was used to remove the effects of hand shake. Various combinations of shutter speed, ISO, and F stops were tried on both the Moon and Jupiter (with and without filtering) to see which setting combinations produced the best working image for pixel counting.
Greg Rudzinski
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