Tagged Questions
8
votes
2answers
357 views
Why doesn't a Medium Format camera exist with good performance at high ISO?
I have had a look at enough medium format offerings, but all the products seems to offer many megapixels and poor performance at high ISOs.
Why doesn't a brand exist to offer slightly lower ...
17
votes
5answers
2k views
What is so special about ISO 1600?
I have heard many times that to minimize noise, the highest ISO you want to use is ISO 1600, and that no matter what camera or sensor you use, once you have passed this (ISO 1600) threshold, the noise ...
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 ...
8
votes
4answers
1k views
Why is the lowest ISO always 100?
The lowest ISO on digital cameras always seems to be 100. It would sometimes be useful to have much lower ISOs, mainly for long exposure photography.
What isn't there any 50, 20, or even 10 ISO ...
3
votes
2answers
312 views
Assuming a perfect sensor, what is the physical limit of ISO/pixel area?
Assuming that camera manufacturers can eventually make the perfect sensor that introduces no electrical noise to the signal, at what point (measured in ISO/area of a pixel) will shot noise be so ...
9
votes
0answers
340 views
What does expanded ISO mean?
Especially with regards to image quality.
I am particularly interested in when you expand to a lower ISO, say 50 rather than 100. Generally the standard high ISO is too noisy, with the expanded ISO ...
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 ...
