I wasn't satisfied with the copper wire viewing rings that I made. So tonight I made viewing "rings "for the Celestron 26mm Plössl, the Edmund (assuming it has a 1" focal length and a 40° apparent FOV), and the Meade OR18mm and 4mm (assuming they have 40° aFOV as well) when used in both the 6" reflector and the 8" catadioptric. I also made viewing circles for the Telrad's 3 rings, the Celestron finder scope, and my Bushnell and Mom's Canon binoculars.
I made these circles on a document on my computer, properly scaling them to Tirion's skyAtlas (first edition), and finally (and here's the important bit...) printed it on transparency film.
Friday, December 02, 2005
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