Sorry, missed much of the thread, but...
The front group is turned to adjust focus at infinity/tele. Infinity/wide
is set by loosening the screws under the zoom ring -- carefully peel off
the grip and you'll see holes, through which you'll see one or more silver
screw heads. Loosen them and the frame holding the rear lens groups will
slide back and forth. It doesn't take much! Then you've got to go back
and forth, wide to tele, several times, until both are sharp at infinity.
Mark Marr-Lyon wrote:
> That's what I figured it should do. Oh well, I guess I'll play around
> with it some more when it gets annoying enough. Any suggestions from
> anyone on how to adjust this other than by adjusting the front group?
> Well, it's not really a group by optical standards, since the elements
> aren't cemented together, but I don't know the correct term for it.
>
> Mark Marr-Lyon
>
> >As close as my eyes can tell, my 70-150 retains it's focus throughout
> >the zoom range.
> >
> >Moose
>
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