I have an OM 150-400 and put camo gaffers tape on the lenshood, so a large white thing doesn't stick out of the blind.Same here - I used them in the past but they were always interfering with the lens controls. I also found they held water when wet - not great to have setting on the lens. I also found that when they were wet and temps were close to the dew point, that as they dried and cooled the lens, it caused fogging. Took them off and never again had the issue. My lenses run around naked and happy now