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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Morning Twilight Camera Jupiter Lunar
From: Bill B
Date: 2012 Sep 08, 16:09 -0400
From: Bill B
Date: 2012 Sep 08, 16:09 -0400
On 9/8/2012 10:58 AM, Greg Rudzinski wrote: > This morning before sunrise was an opportunity to capture Jupiter close > to the Moon on the far side of the illuminated limb. The odd pair showed > conspicuously high in the sky. The DSLR Canon 10MP with the 200mm Excellent results. I finally upgraded to a Nikon D7000 and have a manual focus Nikkor 200mm. With the smaller array the 200mm has a field of view equivalent a 300mm lens. David Burch's "Emergency Navigation" has a simplified method of drawing a circle around the sun, and comparing the current diameter of sun to the pixel count. If I recall you and Marcel went to considerably more effort calibrating lenses and pixel counts, including the use of quadratic equations. I do not remember reading a "cookbook" explanation of your calibration method. If does exist online, would you please point me to it. If not, would you consider publishing it? Thanks Bill B
