Bill Claff's Simple Close-up Calculator!
Lens input values
mmFocal length at infinity focus
:1Reproduction Ratio at closest focus
mmSubject distance at closest focus
mmLength at infinity focus
mmLength at closest focus
Close-up lens input values
DPower
mmThickness
Extension input values
mmExtension
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
More of Bill's stuff
Last revised: 2007-06-12 23:00 GMT