Correct apart from the "preset". Think "count clicks" instead, as there is
(actually unforgivably) no preset functionality on the adaptor, and of
course the lenses don't have anything except the DOF button, which is not
practical for the purpose, being sprung (and should be disabled by the
adaptor like it is by manual tubes).
It would have been be quite easy to arrange a presetting collar on the
adaptor. Maybe you'd be better off waiting to see if Tamron make a better
job of it if they produce an E1 adaptall.
Now, someone please tell me I've misunderstood the Oly statements and that
the adaptor is really "preset", not "stop down" as published.
Julian
----- Original Message -----
From: <NSURIT@xxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: Sunday, April 04, 2004 2:14 AM
Subject: [OM] Lets see if I have this correct about OM glass and E-1 cameras
>
> Assuming I had both an E-1 and the associated adapter to mount my OM
lenses,
> would the following be true if I mounted a Zuiko 135mm f2.8 OM lens on the
E-1.
>
> 1) The effective focal length would be 270mm.
> 2) The effective aperture would remain f2.8.
> 3) The focus would be the same as if it were mounted on the OM . . .
manual.
> 4) I would need to stop it down manually to get the proper exposure as
there
> would be no
> interconnect between the lens and the meter/body. So the method would
be
> a little
> like the old "preset lenses" of the past and you would have to focus
and
> then close the
> aperture down to the desires setting, which you had "preset".
>
> Are these assumptions correct? Is there anything else, I'm missing? Are
the
> adapters going to be easily available from Olympus. I'm sure this has
been
> covered before and I just didn't get it. If 1 and 2 are correct, then my
400mm
> Tamron becomes an 800mm f4 and that might just help to push me over the
edge.
> Hmmm, with a 1.4X or 2X, I might really be able to reach out and touch
> someone. Thank you, Bill Barber
>
>
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