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What is the function of a diaphragm in a film camera?

AIt directs the image to the viewfinder.
BIt focuses incoming light rays.
CIt opens the shutter.
DIt controls the amount of light passing into the film camera.

Verified Answer :

the diaphragm is another term for the aperture, so it controls the amount of light passing into the film camera.

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Answer:

D. It controls the amount of light passing into the film camera

Explanation:

The diaphragm in the photograph is the diameter of the lens aperture. This diameter is one of the factors that defines how much light will enter the camera, up to the sensor. The larger the aperture, the brighter the lens (better suited for low light locations). More open diaphragm = more light = smaller number.

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