I have a Nikkor 35-105 which looks very similar to the Zuiko, also has the
same type of close focus ring. I wonder what company actually made them ?
...Wayne
Wayne Harridge
http://lrh.structuregraphs.com/
> -----Original Message-----
> From: Chris Crawford []
> Sent: Saturday, 30 May 2009 5:04 AM
> To: Olympus Camera Discussion
> Subject: Re: [OM] Oily 300/4.5. Suggestions?
>
> I'd always wondered if the 35-105 had been made by someone else. It
> didn't
> quite look like a real Olympus lens. The ring you turn to put it in
> close
> focus mode looks like something from an off brand lens.
>
>
> --
> Chris Crawford
> Fine Art Photography
> Fort Wayne, Indiana
> 260-747-5101
>
> http://www.chriscrawfordphoto.com My portfolio
>
> http://blog.chriscrawfordphoto.com My latest work!
>
>
>
> On 5/29/09 8:53 AM, "John Hermanson" <omtech1@xxxxxxxxxxx> wrote:
>
> > Even if the front group unscrews easily (and it may), it's still a
> big
> > job. The diaphragm plate has to come completely apart and all parts
> > degreased.
> >
> > At least the plate has 3 screws holding it all together when you drop
> it
> > back in. That is what tipped me off that the 35-105 zoom is
> definitely
> > not Olympus built. The only screws holding all the blade parts in
> are
> > the 3-4 screws that hold the blade assembly into the barrel. You have
> to
> > get all the blades in place, put the cover plate on (no screws
> holding
> > it on), set it all on top of a large diameter dowel and lower lens
> > barrel down around it. Align it with holes in the barrel and get
> screws
> > in before the blades fall out.
> > ___________________________________
> > John Hermanson | CPS, Inc.
> > 21 South Ln., Huntington NY 11743
> > 631-424-2121 | www.zuiko.com
> > Olympus OM Service since 1977
> > Gallery: www.zuiko.com/album/index.html
> >
> >
> > Chuck Norcutt wrote:
> >> Thanks for the warning. Sounds tough.
> >>
> >> Chuck Norcutt
> >>
> >> John Hermanson wrote:
> >>> Remove front lens assembly, remove mount. There are (I think) 4
> screws
> >>> accessible from the back that hold the diaphragm assembly plate in.
> >>> From the front, diaphragm cam, and some springs and levers may
> have to
> >>> come out first. The hardest part MAY be simply unscrewing the from
> >>> group. No set screws, just that many appear to be glued in. Even
> in
> >>> the 80s, I watched Japanese techs (with 300/4.5 in a full size
> vice)
> >>> with giant spanners trying to unscrew the front tube. It never
> budged
> >>> even after liquid wrench, alcohol, acetone, every solvent under the
> sun
> >>> was applied. Spanner eventually broke. Not really a do it at home
> job.
> >>> ___________________________________
> >>> John Hermanson | CPS, Inc.
> >>> 21 South Ln., Huntington NY 11743
> >>> 631-424-2121 | www.zuiko.com
> >>> Olympus OM Service since 1977
> >>> Gallery: www.zuiko.com/album/index.html
> >>>
> >>>
> >>> Chuck Norcutt wrote:
> >>>> Anyone have suggestions for disassembly of the 300/4.5 to clean up
> an
> >>>> oily diaphragm? Someone I know (not on this list) has one and
> asked if
> >>>> I had any tips for cleaning it. I gave him the parts list and
> exploded
> >>>> assembly diagram and an old note from Clint that says the whole
> >>>> diaphragm cage is to be removed as an assembly. But Clint's note
> didn't
> >>>> say anything about the best way to get in.
> >>>>
> >>>> Chuck Norcutt
>
>
> --
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