A Varifocal Lens

question 9

Multiple Choice

A varifocal lens

• A) Makes it possible to adjust the focal length like a zoom lens, but requires refocusing after adjusting the focal length.
• B) Allows the depth of field to be adjusted, making it possible to blur out the background for privacy protection or reducing distraction.
• C) Can rapidly change focus between a set of predefined positions, making it easy to move between different points of interest in the scene.
• D) Is a lens where the focus can be adjusted, as opposed to a fixed focus lens, making it possible to focus on objects close to the camera.

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Definitions:

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