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Is there a formula to convert focal length difference into %tage zoom ?
Is there a formula to convert focal length difference into %tage zoom ? As you may have noticed, adding 10mm to a 35mm focal length is way more significative than adding 10mm to a 300mm focal length. How do you compare those numbers ? Is there a formula to get something like "ok going from 100mm to 200mm is giving you a 150% zoom equivalent" or something?
submitted by /u/unecomplette
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