Questions tagged “numerical aperture”

Ask the Unique Photo creator community — gear, technique, post-processing and more.

0

votes

2

answers

343

How do the f-number formulas f/D and 1/(2NA) relate, and why does NA suggest a limit near f/0.5?

lens-theoryaperturef-numberopticsnumerical-aperture

Photography Stack Exchange contributor

10y ago

0

votes

2

answers

108

How can I estimate a lens objective’s numerical aperture from focal length and aperture?

magnificationlensesapertureopticsnumerical-aperture

Photography Stack Exchange contributor

12y ago