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Lenses
General Lenses
Why are there different objective lens sizes? 52 vs 72 etc.
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<blockquote data-quote="Mike150" data-source="post: 84066" data-attributes="member: 2287"><p>Hey Ted,</p><p>Don't know a good "expert" type answer for you (I'm not that smart). What I do know is that the overall diameter of the lens is related to a combination of the max Aperture (lowest number) and the focal length of the lens. I believe the actual formula is <u>Focal Length / F-Number</u>. Actually I'm hoping this will buy a little time until one of the really smart members can give you a real answer.</p></blockquote><p></p>
[QUOTE="Mike150, post: 84066, member: 2287"] Hey Ted, Don't know a good "expert" type answer for you (I'm not that smart). What I do know is that the overall diameter of the lens is related to a combination of the max Aperture (lowest number) and the focal length of the lens. I believe the actual formula is [U]Focal Length / F-Number[/U]. Actually I'm hoping this will buy a little time until one of the really smart members can give you a real answer. [/QUOTE]
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Lenses
General Lenses
Why are there different objective lens sizes? 52 vs 72 etc.
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