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Re: [OM] Tamron interchangeable lens mounts

Subject: Re: [OM] Tamron interchangeable lens mounts
From: lgriffin@xxxxxxxx
Date: Tue, 28 Nov 2000 07:14:34 -0800
Gary,
        That's the information I was looking for, unfortunately the lens does
not have an Olympus mount, it's N*k*n. I'm afraid Warren was right. The focal
length was right, the constant aperture was good, just exactly what I wanted
at a good price. Unfortunately I didn't consider that it might be before OM.
The lens shipped today, so I should see it before the end of the week. I'm
not going to give up hope yet. I'd like to see the Adaptall-1 mount and
compare with the Adaptamatic.

Thanks Gary!

Gary Schloss wrote:

> On Sun, 19 Nov 2000, Larry <lgriffin@xxxxxxxx> wrote:
>
> >There is a 80-250 f/3.8 Tamron for auction. The seller says that the
> >mount is an early interchangeable(?) system that Tamron had prior to the
> >Adaptall mount. The mount screws in to the lens. Does any know of this
> >lens mount?
>
> ... to which Warren Kato responded:
>
> >Although the price might be tempting, you know the "T" in "T-mount" came
> >from Tamron or its predecessor, Taisei.
>
> The above lens which Larry G. won (congrat's!), is in the so called
> "Adaptamatic" interchangeable mount.  It is indeed a predecessor of
> the Adaptall and the current Adaptall-2 systems (more on those later).
>
> The Adaptamatic adapter rings are indeed threaded into the Auto Tamron
> lens rear.  However, they are completely different from the "T-mount".
> As the "Auto Tamron" name implies, the Adaptamatic system enables an
> automatic aperture coupling between the camera and the lens, whereas
> the T-mount does no such thing.
>
> Appearance-wise, Adaptamatic rings look nothing like the T-mounts.
> I have only seen them in Konica and Miranada mounts, and was quite
> surprised to learn that there exists an Adaptamatic ring in OM mount.
>
> I'd thought that when the first OM bodies and lenses went into mass
> production -- in 1973, the Adaptamatic system was already history.
> (Hmmm, apparently I was wrong...  D*mn!)  Anyway, hopefully when
> Larry G. receives his lens, he will post a picture of this rare OM
> Adaptamatic ring.
>
> Unlike Adaptamatic, the Adaptall/Adaptall-2 system is more advanced,
> and its adapters bayonet-mount on the lenses.  Recently, I acquired
> an Adaptall-1 ring in OM mount.  Again, I'd thought that Adaptall-1
> system preceeded the OM's, and hence there were no such adapters in
> OM mount.  Wrong, wrong, wrong! :-(
>
> Interestingly, the OM Adaptall-1 ring has 3 equally spaced screws on
> its lens flange (no good for OM-4), and -- surprise, surprise(!) --
> no DOF preview lever!  Apparently, this OM ring is intended for use
> with the Tamron lenses which have "AUTO/MANUAL" toggle switch built
> into the lens itself.  (The Tamron lenses and accessories from this
> era are easily recognizable by their distinctive "tamron" logo: all
> lower-case letters with an elongated cross-stroke on the "t".)
>
> If there's any interest, and as time permits, I'll post some picts
> of a sample Tamron lens with an AUTO/MANUAL switch, as well as of
> the Adapall-1 OM ring.
>
> Cheers,
>
> /Gary Schloss.
> schloss@xxxxxxxxxxx
> Las Vegas, Nevada, USA
>
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