What are the theoretical minimum and maximum apertures?
9033
What is aperture, and how does it affect my photographs?
94271
What is the reference plane used when the minimum focus distance is measured?
85095
Selecting optical size?
12506
What exactly determines depth of field?
93638
How can I get the most possible depth of field out of close-up/macro shots?
111172
The limit of radio wave penetration
131314
Finding maximum and minimum with CUBLAS
80997
What advantages does manual mode have over aperture priority mode?
95801
Medium with refractive index less than unity?
115419
Combined numerical minimization and maximization
53448
Do bigger focal lengths capture more light?
41934
How do zoom, magnification, and focal length relate?
34053
How is the width of a slit related to the intensity of light passing through it?
58821
How can the aperture value written in Exif be larger than the nominal limit of the lens?
74363
Why is the bokeh shaped like the aperture?
69119
Is the size of the entrance pupil the same as the size of the effective aperture?
47999
How do you find out the "sweet spot" of a lens?