I recently purchased a 3rd party tripod collar from Amazon for my newly acquired 70-200 f/4. The collar supports the lens as it's supposed to do, but overall I am not happy with it. From time to time I bracket shots using the 2 second delay. This results in images that are not aligned. Today was the final straw when this plastic POS captured a blurry single shot due to movement. Also, the screw knob and motion of turning it feels really cheap and the rotation from horizontal to vertical is never smooth. Minor gripes I know, but using the 2.8 for years it's very noticeable.
How is the OEM f/4 collar? Is it rock solid like the 2.8? I own the 2.8 and never had any of the issues mentioned above. I don't mind spending the $100+ on the OEM f/4 collar IF it's rock solid like the 2.8.
At this point, the f/4 back is back in the Pelican and I will just deal with the extra weight of the 2.8 until I get feedback.
Thanks for any information