This might not be a problem for some, but it was for me. The built in focus wheel control with my Canon 6dMk2 and Canon USM II 24-70mm lens was so noisy and jerky that I couldn't rack and pinion focus or could pull focus (even at full slowdown). I was going to install a new focus motor and it seems to be working, but with such a heavy lens and no risers I couldn't quite get it back into balance. Bought a vertical plate from DJI and everything is fine. Works great for the oily, smooth focus shots I wanted.
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