Tagged Questions
2
votes
1answer
72 views
Signal:noise ratio not really decreasing with ISO for Pentax
In SNR graphs for Pentax K-30 and Pentax K5 there is something I do not get.
For ISO after 1600 the SNR doesn't really decrease. Moreover comparing with Nikon D3200, we can clearly see that until ISO ...
10
votes
3answers
840 views
Why aren't there any cooled CCD sensors to reduce noise?
Sensor cooling is a common technology to get less noise. Why isn't it available on high-end D-SLRs ?
(see http://www.andor.com/scientific_cameras/ikon-m_cooled_ccd/ for an extreme example)
I'm not ...
11
votes
1answer
314 views
What is the statistical distribution of sensor noise?
Sensor noise is a random variation in pixel values, but what kind of random is it? Does it follow a normal distribution, one of the gamma distributions, or something funky like an F distribution?
...
6
votes
3answers
831 views
Loss of image quality after sensor cleaning?
I use a 550D for photography. I got dust in my sensor few days ago while I was doing reverse macro and cleaned it from Canon Service Center. After cleaning I checked my sensor (taking picture of blue ...
