1.

Focal length is minimum and maximum when , five the formula plzzzzzzzzzzzzz say soonnnnnn

Answer»

It is not a measurement of the actual LENGTH of a lens, but a calculation of an optical distance from the point where light rays converge to form a sharp image of an object to the digital sensor or 35mm FILM at the focal plane in the CAMERA. The focal length of a lens is determined when the lens is focused at INFINITY.



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