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Lenses
Prime
Just got the 35mm 1.8 - why is it so small.
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<blockquote data-quote="PhotoAV8R" data-source="post: 63829" data-attributes="member: 939"><p>F-stop is the focal length divided by the diameter of the lens. Division is math. At least it was way back when.</p><p></p><p>The size of the filter on a lens means nothing except it must be at least as large as the effective diameter of the lens. The difference in the diameter of the objective lens between f/1.4 and f/1.8 35mm lenses is less than 6mm.</p><p></p><p>My response does not address the difference in the physical size of the OP's lenses.</p><p></p><p>BWTHDIK - Math major 1974</p></blockquote><p></p>
[QUOTE="PhotoAV8R, post: 63829, member: 939"] F-stop is the focal length divided by the diameter of the lens. Division is math. At least it was way back when. The size of the filter on a lens means nothing except it must be at least as large as the effective diameter of the lens. The difference in the diameter of the objective lens between f/1.4 and f/1.8 35mm lenses is less than 6mm. My response does not address the difference in the physical size of the OP's lenses. BWTHDIK - Math major 1974 [/QUOTE]
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Prime
Just got the 35mm 1.8 - why is it so small.
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