The system magnification is the product of optical magnification rate and electric magnification rate. For microscope system with the camera, if the magnification rate of the objective is A, the magnification rate of the reduction lens is B (eyepiece reduction lens or TV adapter reduction lens). The optical magnification rate will be A*B. The electric magnification rate is the pixel size of the monitor divided by the pixel size of the sensor (if the video is shown at 100% zoom rate).
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