close up filter queries


Numnumball

Senior Member
Mar 6, 2009
13,899
0
0
Central
#2
Its referring to diopter size in terms of magnifying

Technically speaking, it's a term used to identify the refractive (light bending) capacity of a lens. In close up filters, there is a direct correlation between focal length and diopter. Each diopter increases the size of the viewed object by 1/4 (25%) when the object is at its full focal length from the lens.

Hope this clarifies :)
 

Top Bottom