full frame and pixel pitch

Started Jan 4, 2013 | Discussions thread
Theodoros Fotometria Senior Member • Posts: 2,090
Re: full frame and pixel pitch

jhaber wrote:

There is a controversy regarding D3 and 800. Which will provide better images? There are many technical concerns reg. the pixel count and also pixel pitch(the size otf the pizels that are located on the imaging wafer.) The controversy focuses on whether it is better to have more pixels and get higher resolution or have lesser pixels and less noise per unit pixel. The understanding is the imaging wafer is 24x36 mm and if there are more pixels on the wafer and consequently smaller pixels(smaller pixel pitch); if there less light getting on each of the smaller pixels there is a need to amplify the gain on each of the pixels and unfortunately generate either noise in optical terms or distortion in musical terms. The principal is identical. The naysayers will argue that the efficiency of the smaller newer pixel will be greater than the older and better in the efficient extraction of light energy. Why not just make the imaging wafer larger than 24 x36 and then we will have the best of both worlds?


My opinion is that there is a "balance" that alters through time and that there is a balance of owners use that relates with each ones thought... Generally speaking and based on my own experience from prints, I believe that sensors around 16-20mpx are the better balanced ones to cope with more different situations as of todays tech... For the lower sensitivities, I believe that higher density can improve things further, while at higher sensitivities the lower end of the proposed and perhaps a little lower than 16mpx would IMO help things... Too big pixels (like in previous generation cameras) seem not to improve S/N ratio considerably and too small ones, seem not to be able to achieve (yet) the S/N ratio required at higher ISOs without NR help... thus damaging DR... especially as the print develops away from the center and the further it is studied towards the edges... Lens quality and the diffraction involved, complicates things further.

Anyway, I've come to the conclusion that printing resolution is different to ´╗┐visible´╗┐ resolution in all cases and that sensor resolution is a characteristic that shouldn't be considered of the higher priorities for choosing a sensor... other factors matter more.


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