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Small pixels bad for high ISO performance?

piowoc

St. Louis, US
181 posts

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piowoc Registered since 06th Aug 2007
Wed 27-Aug-08 04:03 PM

Hi,

can anybody comment on the following excerpt from Ken Rockwell's site about correlation between pixel size and the sensitivity at low light / performance at high ISO:

"Bigger pixels collect more light (photons). More photons means more clean image compared to the relatively constant amount of electrons making noise. (Yes, I'm simplifying, but it's why bigger sensors are quieter and cleaner.)

Fatter pixels catch more light, so the larger camera doesn't have to amplify them so much for the same ISO sensitivity. This means that even though we wind up with the same exposure, noise and crud aren't amplified as much, leaving us with a much cleaner images without having to cheat with wimpy noise reduction filtration. There is simply less noise. "

(You can find the complete text here:
http://www.kenrockwell.com/tech/full-frame-advantage.htm)

I have no degree in optics or physics, but I believe it would be very interesting to learn how accurate this statement is, assuming possible Nikon's new releases of 20+MP cameras, which will replace the existing FX models in the future.

Are they really going to perform worse in low light conditions than D3/D700? Personally I would be very surprised to see Nikon trying to market products inferior to the existing ones as a new top of their range.

Your comments will be appreciated.

Regards,
Peter

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