Originally posted by fedor42 If I have an K-r with 12 Megapixels, it´s quality is bad regarding the K-5 that has more megapixels?
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More always is better quality?
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Thanks from Costa Rica
"More is always better"? Basically yes, but it is often forgotten that there is more to Sensor- and Image Quality than just pixel-numbers. Simple calculation plus some fundamental laws of statistics and physics tell us:
- More pixels on the same (say APS-C) sensor size means smaller pixels
- Smaller pixels means less light sensitivity (this is NOT a manufacturing issue but the laws of physiscs and statistics)
- Smaller pixels means more (statistical) luminance noise (more is not better here, right?)
- Less light sensitivity means that more gain (electrical amplification) is required
- More amplfication means more electrical noise to combat
.... and so, one could go on and on. Each and every camera + sensor + lens setup involves a number of compromises. There is no theoretical "perfect" solution.
Like many others in this thread, I still keep and use my 6MP camera - in my case the *ist DL - and while a bit outdated in certain aspects, it still (to the level permitted by my humble amateurish skills) produces magnificent pictures!