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So Sigma has announced a 'calibration/update' device that allows users to adjust focus, update bios and who knows what else. It will be a stand-alone accessory.
Any ideas on how this would work? Shouldn't the lens be on the camera when adjusting focus.
Im curious because Ive had bad luck with Sigma in the past, but im in the market for a 35 f1.4, and theirs seems pretty good.