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All answers are right, and i want to add one more. a problem is the focal length. if you increase the diameter, the focal length increases, too. this will make the camera bigger.


The issue is not the number of pixels in the frame. If one wants higher sensitivity of each pixel, then the area of the pixels need to be increased. For many fab strategies, which will result in a larger well, which will increase the quantum efficiency of the sensor. So full frame vs DX or other formats does not make the difference that is realized with ...


With a large sensor the sensor is more expensive (the production cost of a sensor grows at least as fast as its physical area). the whole device is bigger, and requires bigger lenses, that add to the overall cost. There are cameras with sensors larger than full-frame, not mentioning the instruments in any modern astronomical observatory, that are mostly a ...

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