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Looking to upgrade my 45-150mm f4 kit lens to a bigger f2.8 lens. I shoot on a gh4 and mostly do sports videography. Torn between the olympus 40-150mm f2.8 or getting a used canon/tamron 70-200mm f/2.8 with a knockoff metabones like the viltrox. Will putting a shitty speed booster on good glass make image quality look like shit?
