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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Photo sextant sights
From: Bill B
Date: 2008 Aug 03, 17:54 -0400
From: Bill B
Date: 2008 Aug 03, 17:54 -0400
George Huxtable asked > It seems inherently unlikely that the resolution was anything like that. 15 > pixels per minute would require about 450 pixels across the Moon, and nearly > 3000 pixels across the gap between Moon and Jupiter, which is only part of a > screenwidth (and it's not clear where the screen width limits are). Would > that ever be possible, even with the highest-qualitydigital camera? If I am reading you (and doing the math correctly), sure. A 6-megapixle chip with 2:3 aspect ratio would have a 2000 x 3000 pixel matrix (ignoring the finer technical points like "useable pixels etc). A 10-megapixle chip has a long dimension of approx. 3873 pixels. A 10-megapixel chip was available only in top end "35 mm" SLRs a not too many years ago. Now you can get that resolution in a point-and-shoot camera at a discount store. Bill B --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---