Então essa lente, exatamente a mesma lente terá menos luz na aps-c que na FF?
Enviado de meu SM-N975F usando o Tapatalk
Carlos: "luz" = energia = photons a disposição do sensor; maior área = "mais luz"
essa quantidade de energia
a mais disponível significa: menos ruído, mais dynamic range, melhor SNR.
"Larger sensors generally also have larger pixels (although this is not always the case), which give them the potential to produce lower image noise and have a higher dynamic range. Dynamic range describes the range of tones which a sensor can capture below when a pixel becomes completely white, but yet above when texture is indiscernible from background noise (near black). Since larger pixels have a greater volume — and thus a greater range of photon capacity — these generally have a higher dynamic range."
"No matter what the pixel size, larger sensors unavoidably have more light-gathering area. Theoretically, a larger sensor with smaller pixels will still have lower apparent noise (for a given print size) than a smaller sensor with larger pixels (and a resulting much lower total pixel count). This is because noise in the higher resolution camera gets enlarged less, even if it may look noisier at 100% on your computer screen. Alternatively, one could conceivably average adjacent pixels in the higher pixel count sensor (thereby reducing random noise) while still achieving the resolution of the lower pixel count sensor. This is why images downsized for the web and small prints look so noise-free."
Agora, tem que ter cuidado ao comparar sistemas diferentes, (câmeras diferentes, sensores e lentes diferentes), pois tem outros fenômenos importantes na qualidade final da imagem, como por ex a Difração, entre outros.
https://www.cambridgeincolour.com/tutorials/digital-camera-sensor-size.htm