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Have you ever tried combining a speedbooster with a converter?
Rather esoteric, but I want to use my speedbooster with a Pentax-K mount with some old manual olympus lenses. Would I find a dumb converter from Pentax-K to those lenses, could I use them without a problem?
I'm pretty sure it would impact quality in a negative way, but it would be 3 okayish lenses nearly for free.
So, basically MFT to Pentax-K speedbooster and Pentax-K to "Whatever those Olympus lenses have".