ross_shepherd Posted February 26, 2006 Share Posted February 26, 2006 Has anybody tried using simple lenses like loupes or diopters orreading glasses etc. as lenses also if I were to do so how would Icalculate aperture? Link to comment Share on other sites More sharing options...
steve_hamley Posted February 26, 2006 Share Posted February 26, 2006 Ross, Sure, it's a lot of fun. As for calculating f-stops, http://www.apug.org/forums/showthread.php?t=25071 Also, verify with a Polaroid before doing any "critical" work. Steve Link to comment Share on other sites More sharing options...
ross_shepherd Posted February 27, 2006 Author Share Posted February 27, 2006 How would I calculate the focal length of the lens? Link to comment Share on other sites More sharing options...
dan_fromm1 Posted February 27, 2006 Share Posted February 27, 2006 Don't calculate, measure. Link to comment Share on other sites More sharing options...
ross_shepherd Posted February 28, 2006 Author Share Posted February 28, 2006 How do I measure? Link to comment Share on other sites More sharing options...
dan_fromm2 Posted February 28, 2006 Share Posted February 28, 2006 Use it as a burning glass. Focus it on the sun, measure lens to hot spot distance. Link to comment Share on other sites More sharing options...
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