Sample shots wanted: Sigma 120-400mm F4.5-5.6 APO DG OS HSM
I would not expect the 120-400 to be acceptable with a TC.
I could be surprised?
Best regards
This is the 150-500 with a 1.4 on a tripod I think.
Better than I expected, but on the real world the AF locked on maybe 1 in 4 attempts and if hand holding or a moving subject, then no chance.
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