by Brent Bergherm
In this video I take a look at various tripod collars AND I fix an annoying issue with my Sigma 120-300 f/2.8 sports.
A while ago I had a client mention that the Sigma lens would grind as he rotated it from vertical to horizontal positions using the tripod collar. So I researched the issue and I fixed it. Take a look to learn more about your lens’ tripod collar design.
Links from Amazon for screws and bearings.
Screen shots from video.