Hi, Vic.
> My Tokina 90/2.5 macro seems to have developed a case of sticky
> iris. There is no noticable oil on the blades. When it works it
> works fine when it doesn't I have to play with the f/stop ring or
> the little steel thing sticking out the bottom of the lens to get
> it working.
Ooh - sorry. Of course, as I think you do suspect, just because
there is no ~visible~ oil does not mean that there might not still
be some oil gumming up the less visible parts of the iris assembly.
> 1) Any ideas, or has anyone else experienced similar problems with
> said lens?
I've previously owned two of these critters, and neither ever had a
diaphragm (or, in fact, any other) problem. ("I feel your pain.")
> 2) Is it worth taking in to a local camera store that does repairs
> for cleaning etc?
I would think that, if you have a lens that is the optical twin of
the more-well-known VS1 90/2.5 Macro, and that (at 4.6 out of 5.0)
tested better than almost all others of the literally hundreds of
lenses tested by Photodo, getting it fixed would be well worth it.
Fred
