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Macro lenses with extension tubes

Started Feb 16, 2019 | Questions thread
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EofC
EofC New Member • Posts: 3
Macro lenses with extension tubes

Hi all

Is there a way to accurately calculate new closest focusing distances and magnification ratios of 1:1 macro lenses when used with extension tubes?

Do results differ between internal and external focusing lenses?

The online tools I've found don't give consistent results and seem to be designed with standard lenses in mind.

Thanks for any insights...

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