Bill Claff's Simple Close-up Calculator
Lens input values
	mm	Focal length at infinity focus
	:1	Reproduction Ratio at closest focus
	mm	Subject distance at closest focus
Close-up lens input values
	D	Power
Extension input values
	mm	Extension
Results for lens, close-up lens, and extension
	x	Magnification at infinity focus
	mm	Subject distance at infinity focus
	x	Magnification at closest focus
	mm	Subject distance at closest focus
More of Bill's stuff
Last revised: 2007-06-08 22:30 GMT