NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: On The Water Trial of Digital Camera CN
From: Jeremy C
Date: 2010 Jun 26, 09:12 EDT
From: Jeremy C
Date: 2010 Jun 26, 09:12 EDT
If this is the case, you are probably being generous as to the sextant's
accuracy. While some models give markings to the 0.1' of arc (6
arcseconds), the best sextant accuracy I've seen even advertised is about 9
arcseconds, and some up to 20 arcseconds. With current production,
metal sextants you are looking at 10 to 20 arcseconds.
I agree that your practical accuracy, which is much more dependent on the
user and environmental conditions than the instrument, will be fairly
close.
Jeremy
In a message dated 6/19/2010 7:24:01 P.M. Bangladesh Standard Time,
gregrudzinski@yahoo.com writes:
Marcel,
The precision between the 50mm len on a 10 mp camera vs. a sextant is simply comparing the minimum of 0.1 moa on the sextant's micrometer drum with the 0.4 moa of a single pixel width for the 50mm / 10 mp camera system. Practical accuracy between the camera and sextant seem to be very close in spite of the precision difference.
Greg Rudzinski
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