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camera lens SIZE vs refractor
The whole of the Internet seems unable to answer the question I'm asking. Any search about comparing camera lenses with refractors produces only the inevitable responses about the differences between the two for astronomy, but that isn't what I'm asking.
I fully understand that camera lenses are defined by their focal length and nothing really to do with aperture (not directly anyway) and telescopes of course are defined by the diameter of the lens/mirror.
All I want to know is what camera lens is the equivalent of an 85mm f/5.3 refractor in terms of light gathering/image size?
Chris
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