Physics, asked by waseemasgar, 19 hours ago

focal length define in about 50 words​

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Answered by mani060411
2

Answer:

It measures the distance, in millimetres, between the optical centre of the lens and the camera's sensor (or film plane). It is determined with the camera focused to infinity. ... For example, a 50 mm lens has a focal length of 50 mm. This Fujifilm lens has a focal length of 50 mm.

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