On Mon, 3 Apr 2000 23:51:06 -0500, "Tom Scales"
<tscales@xxxxxxxxxxxxx> wrote:
>I have a couple questions I'll throw to the list, probably before I send
>both lenses off to John at Camtech.
>
>50 f/3.5 - Can't believe I didn't notice this, but there is a piece missing
>at the back of the lens. I've been told it's called a baffle, but I'm
>baffled <grin>. At the back of most of my Zuikos, there is a tab of sorts
>that is attached to the back, right up against the side of the glass. It's
>all black and curved and juts out and is essentially on what would be the
>bottom of the lens (or body). On the 50 macro it's missing and there is
>just a shiny silver spot on the back of the lens. So, the questions are:
>
>1) What does it really do
>2) What happens if you don't have it
>3) Can it be inexpensively replaced
The only purpose of these tabs, which actually can have different
shapes on different lenses, is to protect the rear element from
touching the surface when you place the lens somewhere with the rear
element down without a cap on it.
The tabs are spotwelded and can be pushed off by thumb with light
pressure needed. Sometimes this is done deliberately to make the lens
fit onto a 2xA or maybe another converter.
If you still have the tab it can be glued on with one tiny drop of
epoxy or super-glue. I do not know if replacement makes sense,
economically speaking...
>
>I'm going to keep one 50 macro and if this piece isn't critical, I'm home
>free. I suspect it is, since they wouldn't have it if it isn't important.
>
>35-70 f/3.6 - I sold this one and got it back. I think that's probably
>right. This one is harder to describe. This is a wierd little lens, I
>think because of its design, but the feel is unusual. The question is
>whether that's right or not, so here goes. The problem seems to be that
>there is a little 'play' in the focus ring. You can move it slightly,
>probably an 1/8th of an inch, before it 'catches' and the focusing occurs.
>It's more pronounced at the 35 position than the 70 position and at 35 it's
>not exactly what I'd call smooth. At some points the focus ring moves more
>easily than at others. Not a big difference, but noticeable. I bought this
>one from the Olympus guy, so I'm a little surprised that this is occuring.
>It focuses, so I'm not positive the feel is actually a problem, but it is
>wierd.
>
This lens has hundreds (?) of little bearing balls inside. If you take
the lens apart, you probably will loose some of those. A wild guess o
mine is, that it has been put together again with som of the balls
missing - but I will be happy to stand corrected on this one if there
is a better explanation.
>
>So, I suspect the answer is that they both need fixed, which is ok I guess,
>but the cost may be more than the value of the lenses. They're nice lenses
>though, so I'm confused.
>
The 50 doesn't need any repair, and the zoom repair probably will be
too expensive....
This is the kind of lenses that I keep in the trunk of my car with a
beaten up OM-1 body. They are not my favorites, but in case of
emergency I can take pictures...
>
>One last comment. I got an interesting kit today and since some of you like
>to hear about them, I'll mention it. I bought it to get the 35-105 that was
> included. I like this lens a lot and can't wait to try it. It's in mint
>condition, no wear at all. The one-touch is nice and smooth. It even has a
>close focus feature that is a little unusual. The rest of the kit was nicer
>than expected too. It came with a 50 1.8, an older SC. It also came with a
>very nice 24 2.8 and the most interesting piece is a black OM-1, not an MD.
>I've never even seen one without the motor drive connection.
>
>So, my last question. Does anybody have any idea what a black OM-1 is
>worth?
>
>Thanks to all.
>
>Night.
>
>Tom
And to you, Kit Tom.
Had better wish you good morning at the same time (it is 9:14 am here
now...)
Frank van Lindert
Utrecht NL.
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