CameraTraveler@aol.com wrote/replied to: >> I have a 28-135 Canon IS lens. When I point it down, the barrel slides >> all the way out. It doesn't fall out on the floor, it just slides out >> the lenght of its extension. >> > >This is why I prefer two-touch zoom lenses. Push-pull zooms tend to have >this creeping problem, either right out of the box or when they have been used >for a while. Good push pull lenses have a locking ring to adjust the friction. Like my EF100-400L IS. I really like this ability.
