A 72 mm focal-length lens is used to focus an image on the

Reference no: EM13621800

A 72 mm focal-length lens is used to focus an image on the film of a camera. The maximum distance allowed between the lens and the film plane is 120 mm. How far ahead of the film should the lens be if the object to be photographed is at the following distance from the lens?

(a) 13.0m away

(b) 4.0m away

(c)1.1m away

(d) What is the closest object this lens could photograph sharply?

Reference no: EM13621800

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