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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
200mm Lens Calibration Using Doubler
From: Greg Rudzinski
Date: 2020 Dec 9, 14:37 -0800
From: Greg Rudzinski
Date: 2020 Dec 9, 14:37 -0800
A 200mm lens can be doubled to perform like a 400mm with a slight loss of quality. The calibration using a Sun diameter of 32.482' worked out to .0327' moa per pixel with the Canon 200D set at 24MP, f 8, 1/400 sec, ISO 100. Solar activity looks to be increasing so get your Faraday cages ready ;-)
Greg Rudzinski
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