In a 35 Mm Single Lens Reflex Camera (SLR)the Distance

In a 35 mm single lens reflex camera (SLR) the distance from the lens to the film is varied in order to focus on objects at varying distances.Over what range must a lens of 45 mm focal length vary if the camera is to be able to focus on objects ranging in distance from infinity down to 1.4 m from the camera?

A) 1.49 mm
B) 1.20 mm
C) 4.48 mm
D) 5.98 mm
E) 2.09 mm

Correct Answer:

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