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  • Amateur Photographer

    Tech Support

    Oct 30, 2018 3 minutes

    Loss of light confusion

    Q Could you explain to me the correlation, if any, between the crop factor on a sensor and the aperture on any given lens? Is there any actual loss of light if using anything smaller than full frame, or is it purely academic as some of the explanations seem to suggest? I have read a few articles that appear to be contradictory and it's very confusing.

    David Richards

    The aperture of a lens is the focal length of the lens divided by the diameter

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