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TD

Everett, US
154 posts

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"RE: Magnification ratio"

TD Basic Member
Wed 20-Jun-01 05:32 PM

Thanks, Scott. I had forgotten that the thumb rule applies at infinity focus. That would explain why the 55mm micro only needs 27.5mm of additional extension to go 1:1. When the lens is set at its closest focus (a reproduction ratio of 1:2) the extension has taken place internal to the lens.

A general, generic topic Magnification ratio [View all] , org , Wed 20-Jun-01 06:46 AM
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