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bdial · 04-12-2007, 12:00 PM

Divide or multiply by 25.54 (25.54 mm = 1 inch) or 2.54 for centimeters. For most LF lenses, you don't need to be quite so precise, a 250 mm is for most purposes, 10 inches.
Or if you need precision, keep your cell phone handy.

04-12-2007, 12:00 PM	#3 (permalink)
bdial Join Date: Jan 2005 Location: Live Free or Die Posts: 2,513	Divide or multiply by 25.54 (25.54 mm = 1 inch) or 2.54 for centimeters. For most LF lenses, you don't need to be quite so precise, a 250 mm is for most purposes, 10 inches. Or if you need precision, keep your cell phone handy. Last edited by bdial; 04-12-2007 at 12:13 PM..