Lens Magnification and Depth of Field Calculator

Could one of my lenses be used for macro photography? How much would a lens extension tube or a bellows improve the situation? What depth of field can be expected?

Here is an easy to use calculator for these questions. It is written in JavaScript and also works off-line. See lens magnification, extension tubes and depth of field for the theory behind it.

focal length mm
focusing distance m
extension tube mm
f-number
circle of confusion mm
 
 
magnification ×
new focusing distance m with lens extension tube
depth of field - m
remarks

 

 

December 09, 2011