Originally Posted by
David Stephens
feels that he might not be able to handle his 500mm with a Sidekick. I do it all the time and experience no ambiguity or fear about my Wimberley lens plate locking with the Arca-Swiss quick-release (I use the screw type, not the lever type, to greatly reduce the chance of accidental release0. I DO double and triple check the security of the ball, the plate and the lens. The balance is perfect. IMHO, if it'll work with a 300/2.8 then it's fine with a 500/f4, given an adequate ballhead for the task.