[pure-silver] Re: Odd Problem With Mamiya TLR
- From: Don Sweet <don@xxxxxxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Tue, 16 Feb 2010 11:30:41 +1300
Hi Tim
I too have a C220, with the engraved scale described by Eric. I focus
using the ground glass and a magnifier, and have found no problems with the
55mm lens (my favourite).
Apparently the distance scale rod on some of the C330 models is mechanically
very fiddly. Also there must be some scope for confusion arising from the
need to read the scale at different points depending on the focal length of
your lens - when the rod is in the 180/55 position, I believe the 55mm
distance is shown in red in the window, and the 180mm distance in black at
the front edge of the camera body.
Don Sweet
----- Original Message -----
From: "Tim Daneliuk" <tundra@xxxxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Tuesday, February 16, 2010 9:32 AM
Subject: [pure-silver] Odd Problem With Mamiya TLR
> I have an old Mamiya C-330f with a few lenses that I keep as a "fun"
camera.
> I just came upon a 55mm f/4.5 at a price I couldn't pass up. The lens
> looks barely used. HOWEVER, something strange is afoot and I'm hoping
> someone here can help out...
>
> The 330f has a "distance scale" on it. You rotate the scale to select the
> lens you're using and after you focus the body, the scale indicates the
> distance. This scale works perfectly with the 80mm and 135mm lenses
> I already have. However, when I rotate it into position for the
55mm/180mm
> lenses, the focus distances displayed a considerably shorter than the
> real distance. My understanding is that there is only one calibration
> adjustment for the scale inside the body. Since the scales work properly
> for the other lenses, it's doubtful this is a body problem.
>
> So, I suspect the lens. But ... the lens looks almost unused.
Ordinarily,
> I would suspect that someone serviced the lens and forgot to reinstall
> the shims between the lens barrels and the mounting plate when they put
> it back together. But, there is no sign - not a scratch - to indicate
this
> thing has ever been disassembled.
>
> I just shot a roll focusing carefully at different distances through the
> finder. If that's ok, then I'm not terribly worried about the distance
> scale problem. However if someone installed only *one* of the shims -
> either on the taking or viewing lens - then the apparent focus in the
> view will be different than the actual focus of the taking lens which
would
> be ... Very Bad (tm).
>
> Anyway, anyone here have experience with these or seen this kind of
problem
> before?
> --------------------------------------------------------------------------
--
> Tim Daneliuk tundra@xxxxxxxxxxxxxx
> PGP Key: http://www.tundraware.com/PGP/
>
>
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