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F11 lens with 2x TC = F22?

Started Aug 5, 2020 | Questions thread
quokka Regular Member • Posts: 250
Re: F11 lens with 2x TC = F22?

Diffraction is a key issue with digiscoping and likely an f11 lens with a TC.   https://www.lensrentals.com/blog/2012/10/scoping-out-digiscoping/ explains it nicely.

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