Concept explainers
If a 135-mm telephoto lens is designed to cover object distances from 1.30 m to 8 , over what distance must the lens move relative to the plane of the sensor or film?
The distance through which the lens has to move relative to sensor film.
Answer to Problem 7P
Solution:
The relative distance through which the lens has to move from the sensor film is 16mm.
Explanation of Solution
By using lens formula, the image distance, and hence relative distance can be calculated.
Given:
Formula used:
Lens formula
Calculation:
If u = 1.30m,
If u = ∞,
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