All Questions
Tagged with aperture terminology
12
questions
57
votes
9
answers
144k
views
What is aperture, and how does it affect my photographs?
How does aperture affect my photographs?
Why should I care about the aperture with which a photo was taken?
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?
32
votes
2
answers
27k
views
What is T-number / T-stop?
Usually, when discussing aperture of a lens, F-stop and F-number are used for quantifying. But some photographers, and especially videographers, also mention T-stop. The concept and numbering used (e....
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 ...
26
votes
4
answers
6k
views
What is a "fast" lens?
I've been reading lots of camera reviews lately and have ran across several references to "fast" lenses.
What exactly is a fast lens and what are its advantages compared to other lenses?
14
votes
6
answers
12k
views
What is the meaning of "stopped down"?
Was reading this answer (emphasis mine):
It also tells us that the lens was stopped down, as if it were wide open there would be no corners to cause diffraction, regardless of the number of ...
12
votes
3
answers
9k
views
Why don't comparisons of aperture take sensor size into account?
When one compares focal length, many times we use the 35mm equivalent length. A 50mm lens on an APS-C sensor camera(1.6x) would be a 80mm equiv. length on a full frame camera.
But when we state the ...
19
votes
5
answers
3k
views
What are the benefits of the classic f-number scheme?
Classic ƒ numbers are entrance pupil diameter as a fraction of focal length. This seems like a slightly strange choice as exposure is proportional to area rather than diameter. Naively I would think ...
12
votes
4
answers
15k
views
What is a "small" aperture?
It happens a lot. People refer to the aperture being small (or big!). By default does this imply a small opening of the iris (literal aperture), or a small f-value (how the aperture is measured, for ...
10
votes
3
answers
2k
views
What is the technical name for a zoom lens which has a fixed maximum aperture?
What is the technical name for a lens which has the same maximum aperture throughout the entire zoom range?
6
votes
4
answers
4k
views
What are the types of aperture blades?
The Canon EF 24-105mm f/4 L USM IS lens has rounded aperture blades. What other types of aperture blades are there, and what are the advantages and disadvantages of each of them? Is the aperture ...
2
votes
3
answers
3k
views
What does "maximum aperture" mean in a camera spec? Where can I get the full aperture range?
I own a Canon S95, and am considering getting a newer model (e.g. Canon S110 or S120), and I'm comparing the specs. According to DPReview.com, the S95 has a maximum aperture of F2.0-F4.9, and the S110 ...