>>4269649>same amount of lightuh uh
yeah
sure
https://www.youtube.com/watch?v=h4iQmjONCb8>inb4 nooo its because enlarging!no, its because of light.
a crop sensor is EXACTLY equal to a same sized crop of a full frame sensor with crop-mp*crop-factor^2 megapixels. the FOV changes not the DOF. it gathers less light (signal) and has more noise. the way this works, is yes, cropping does change the SNR because of PHOTON SHOT NOISE. it sounds insane! but its real.
Dark Shot Noise (σD): Dark current is a current that flows even when no photons are incident on the camera. It is a thermal phenomenon resulting from electrons spontaneously generated within the silicon chip (valence electrons are thermally excited into the conduction band). The variation in the amount of dark electrons collected during the exposure is the dark shot noise. It is independent of the signal level but is dependent on the temperature of the sensor.
Read Noise (σR): This is the noise generated in producing the electronic signal. This results from the sensor design but can also be impacted by the design of the camera electronics. It is independent of signal level and temperature of the sensor.
>Photon Shot Noise (σS): This is the statistical noise associated with the arrival of photons at the pixel. Since photon measurement obeys Poisson statistics, the photon shot noise is dependent on the signal level measured. It is independent of sensor temperature.<Fixed Pattern Noise (σF): This is caused by spatial non-uniformities of the pixels and is independent of signal level and temperature of the sensor.
>inb4 equivalencedebunked as of minimal importance in real life, non snapshit photography.
