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3 votes
2 answers
2k views

How does physical aperture size relate to f/stop?

There are two lenses on the market I am comparing AF Micro-Nikkor 60mm f/2.8D AF-S VR Micro-Nikkor 105mm f/2.8G IF-ED If I use the formula for calculating apertures of both the lenses I will use the ...
Black Dagger's user avatar
23 votes
7 answers
14k views

How can aperture be f/11 on a lens with an aperture range designation of 3.5-5.6?

I made a series of outdoor shots with Nikon D5000, with the 18-55mm 1:3.5-5.6G VR kit lens. On some shots, I see in the EXIF info f/11, and in another shot, f/9. How can that be, that the f-number ...
Andrei's user avatar
  • 1,097
68 votes
4 answers
153k views

What does f-stop mean?

What does f-stop mean? Is it the same thing when people say "2 stops" for example?
matt burns's user avatar
  • 6,036