Mark et al.,
I fixed the 50 f1.8 that I gave to one of my brothers years ago. Although I
didn't have your directions at the time, I remembered
that someone on the list said that this is a Do-It-Yourself job and you were
right. On his lens all I had to do was remove the
mount, carefully clean everything and reassemble. The button/lever had jammed
down, wedging a piece of spring steel, which shoved
the button/lever slightly sideways. There was a bit of pocket fuzz in there
too. I cleaned it up, let it dry, closely inspected it
with a gooseneck lamp and a halogen bulb, picked out the lint, and reassembled.
I disassembled lens in a white plastic tray (to hold loose parts) as John H.
has described. Mine was the sandwich tray from a mini
cooler.
It was easy and kinda fun.
Then I took the stainless steel mount off the front of the OM-PC. I had the
camera lying on its back so when I lifted the mount
free, the detent ball sat in place.
I removed the shutter speed ring (which isn't aluminum- it's very thin
plastic). I cleaned it up a bit, especially the ball. As
someone (John Lind?) suggested, I put a speck of lubricant on it,
double-checked for lint and reassembled. Both jobs were easy.
I wish you guys had been around 25 years ago when the meter died on my 4 year
old OM-1. Not knowing what I know now, I blundered
into removing the TOP plate and converted a nearly perfect camera into a basket
case. Anyway, thanks to all.
Lama
> On Sat, 28 Jun 2003, Mike wrote:
> > I just noticed that one of my lenses has a sticky DOF preview mechanism.
> > <> When I push the DOF preview the lens stays stopped
down until I bump the
> > little lever (yes I have to remove the lens). So I think it is just in
> > the DOF preview mechanism. How hard is this to fix?<>
From: "Mark Dapoz" <md@xxxxxxxxxxxx>> It's likely the levers in the mount are
saturated with oil/grease which has
> migrated from the helicoid. You can remove the mount by unscrewing the
> screws located on the face of the mount. You don't mention which lens this
> is, but for most lenses this is sufficient to allow the mount to be removed.
> You can then flood clean it using a light degreaser such as isopropyl alcohol.
> Let dry, reassemble, and it should work.
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