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What does CA stand for?

CA stands for Clear Aperture

This definition appears very frequently and is found in the following Acronym Finder categories:

  • Science, medicine, engineering, etc.

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Other Resources:
We have 462 other meanings of CA in our Acronym Attic

Samples in periodicals archive:

Fixed power scopes are designated by a first number which tells you the magnification and a second number which gives you the clear aperture of the objective lens in millimeters.
Red Hawk has come up with a large diameter peep sight that will allow the maximum amount of light transmission through a high contrast amber lens, but with a small, clear aperture in the center.