See the following article in Spanish:
http://www.guillermoluijk.com/tutorial/noisedr/
(Google-translated English page here)
The Signal-to-Noise Ration (SNR), Level of Saturation (for 12-bit Vs 14-bit), Dynamic Range (DR, in EVs) etc. are measured. This is an interesting read (but maybe a bit more difficult) and the comparisons are made on the same methodologies and bases.
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Wednesday, December 01, 2010
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Comments by IntenseDebate
Sensor Performance Analyses on RAW: 5D Vs 5D2 Vs 7D Vs K-5
2010-12-01T13:58:00+08:00
RiceHigh
Colour Accuracy|Full Frame|Image Quality|K-5|Other Bodies|Sensors|Software|
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garedagmad · 745 weeks ago
RiceHigh 110p · 745 weeks ago
garedagmad · 745 weeks ago
Dimitri · 745 weeks ago
Beware of 14 (NOT 12 as in the most graphs) divisions on the EV scale ;-)
I must admit, that my experience with testing both K5 and D7000 and comparing with 40D in real life (hand held, low light shooting) in regard to IQ and per pixel sharpness of the resulting images was quite sobering. Both K5 and D7000 are gone back and i am keeping my 3 y.o. 40D
I think, we are all still easily fooled by camera manufacturers, who are really not doing theire best to develope better cameras...
Erika · 745 weeks ago
There are technical limitations. More megapixels will generate more noise (because each pixel is smaller), and place higher requirements on the lens and focus quality. Naturally that it will be visible when pixel peeping the images.
Dimitri · 745 weeks ago
Why not invest in the development of high quality 12MP Sensors and better lenses?
Look at 12 mp images GF1 + 1.7 20mm combo, they are great!
In low light handheld shooting wide open at 1.7 and 1/30s they give at 400-800 ISO better images as i could get with D7000 DX 35mm f1.8 combo!
B/C you have to set at least f2.8 or better F4 (actually f5.6-8 optimally) to get sharp image with DX 35mm f1.8 AND you need at least 1/60-1/100s shutter speed with D7000 handheld. For this setting you easily get ISO1250-2000 on D7000 (or K5) and then look at the resulting SOFT and NOISY images!!!
Why not make larger sensors? Is a FF-Sensor produced in the same quantities as APS that much priecier?
risinsun · 745 weeks ago
j viviano · 745 weeks ago
If you follow this rule, the increase in MP would be helpful. I still believe that 12MP is enough though, and would prefer ultra-sharp and clean high ISO from 12MP.
garedagmad · 745 weeks ago
illdefined · 745 weeks ago
He won't read it, much less post it, this blog is only about the negative of Pentax.