Bill Claff's Simple Close-up Calculator

Simple Close-up Calculator
Body input values
	mm	Flange focal distance
Lens input values
	mm	Focal length at infinity focus
1:		Reproduction Ratio at closest focus
	mm	Subject distance at closest focus
	mm	Length at infinity focus
	mm	Length at closest focus
Close-up lens input values
	D	Power
	mm	Thickness
Extension input values
	mm	Extension
Results for lens, close-up lens, and extension
	x	Magnification at infinity focus
	mm	Subject distance at infinity focus
	mm	Working distance at infinity focus
	x	Magnification at closest focus
	mm	Subject distance at closest focus
	mm	Working distance at closest focus