Nininini said:hendrik-sg said:For this pixed density the system is clearly diffraction limited, which means it has no possibility to take sharp pics even with a really good lens.
You don't understand how diffraction works in the real world.
The amount of detail you gain from adding more pixels more than makes up for the small detail you lose due to diffraction.
It reminds me of those people who complain that "lenses can't resolve that amount of pixels". These people don't understand that even the worst lens in the world will be able to capture more detail, regardless how bad the lens you put in front of the sensor is.
Thanks for your friendly judgement. I understand difraction quite well, in oposite to most others i could calulate with it and understand the physical basics. From what you want to say (beside qualifying my statement) you are mostly right, but you did not understand my point.
At the diffraction limit you have the same loss from diffraction and from limited sensor resolution (and the bayer filter reduces the sensor resolution even more. This means with a pixel density higher than the diffraction limit the system resolution converges towards the diffraction limit, below the diffraction limit it converges to the sensor resolution. this means every stop of sensor resolution gives less benefit than the last one. a sensor this dense may have a diff limit around 2.8. having a lens with opening 40 this sensor is definitively overkill.
A less long lens with a brighter opening 500mm with f20 equiv than 1000mm with f40 will resolve the same detail but be much less prone to camera shake. As as most people do not have a 1200mm FF lens few owners of 1200mm superzoom camera will have a high end tripod, they will hand hold the camera. At home they may be faszinated of the tight framing (which maybe not contains the intended target) or be frustrated about blurred images.
i remember a friend who (as a beginner) went on safaro with a 24MP APSC camera and a stabilized 300mm F5.6 lens, he did not bring home even one sharp 300mm shot