Tagged Questions
9
votes
4answers
706 views
Why is sensor sensitivity called “ISO”?
I was curious to know how the term "ISO" was coined for referring the image sensor's sensitivity. Is there any reason or circumstance that contributed for terming "ISO"?
Also, does ISO has a literal ...
9
votes
2answers
1k 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 ...
1
vote
2answers
206 views
9
votes
2answers
2k views
What is “pixel density”?
Apparently megapixels aren't a good way to measure the camera quality, so some people are referring to a relative measuring system called "pixel density".
What specifically is this? What information ...
32
votes
8answers
8k views
What does “expanded ISO” mean?
The ISO specification for the Canon EOS 7D reads as follows:
High ISO
For handheld shooting in low light, the EOS 7D offers ISO
speeds of up to 6400. Expandable to
ISO 12800, for low light ...
