A Camera Lens Has a Fixed Focal Length of 35

question 13

Multiple Choice

A camera lens has a fixed focal length of 35 mm. How far must the lens be moved, relative to the image sensor, in order to change the focus from an object that is 20 m away to one that is 3 m away?

• A) 0.34 mm
• B) 0.41 mm
• C) 0.35 mm
• D) 0.47 mm

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Definitions:

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