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  1. MJN

    Canon MKIII convertors experiences please

    Do you have an option to borrow some mk3 convertors off a mate to try them? It may be worth a try particularly with the pixel packed sensor of the 90D which also has a fairly basic af system. Using a 90D + 500f4 mk1 + a 2X mk3 may require rock solid support + good conditions + good technique +...
  2. MJN

    Canon MKIII convertors experiences please

    What are the issues with the previous model convertors (mk2) ? I had both 1.4x and 2x for many years and wasn't aware of any issues concerning IQ or AF when used with L glass. In my opinion the Mk3 convertors are not particularly better optically but the 2x mk3 certainly performed better than...