Dave, Tightening it gives greater resistance for manual focusing. It should be loose for auto focusing.
> Hi Gang. > > I did a Google on this but came up empty. Boz's site just mentions the clamp > but > no > details. > > So. > > Can someone fill me in on what the clamp knob does on the lens. > I know what the focus range knob does.(if it does what the Nikon lens does, > then > yes.LOL) > > Thanks for any assistance. > > Dave > > > >
