My old Manfrotto 322RC2 grip ball head has lost its friction and ability to hold the gear in position, except when in horizontal setting. I was never really happy with it anyway, as the action of releasing the trigger always induced some small movement on the camera.
I am now looking for a replacement ball head, which is able to securely hold a Canon EF 70-200mm f/2.8 mounted on a 7D body, especially in odd angles. It is very important that the locking action will not move the camera once in position.
Searching the web I found a few heads at the range of $35 that supposedly hold that weight. But I am looking for an experienced advice. The price range should be less than $80 or so.