Tagged: F-stop

DSLR teleconverter

A teleconverter increases the focal length of an interchangeable lens, but it also reduces the effective aperture size, magnifies aberration created by the main lens and may interfere with autofocus.

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The aperture controls the amount of light that reaches the camera sensor, acting much like the pupil of an eye that widens or decreases in size as the intensity of light changes.

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