why everyone can see a picture taken from the microscope clearly, but when seeing through the microscope you need to change the focus to see clearly

Question

why everyone can see a picture taken from the microscope clearly, but when seeing through the microscope you need to change the focus to see clearly

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Answer 1

Because the microscope was focused prior to the picture being taken. This makes sure what the camera sees is sharp and in focus. A camera is a lens, just like your eyeball. Both need to be focused when looking at something.