The adapter hasn't arrived yet at my doorstep. They promised it "after March
31". So I don't know the exact methodology for moving to the shooting aperture
for MF lenses. Likely it will set the aperture pen all the way over and as you
move the aperture ring on the lens, the diaphragm will stop down. So it won't
have a nice stop-down mechanism like the 35-Shift lens. BTW, the adapter is
easy to get in the U.S.; you only have to register your E-1 and call Olympus
and order the adapter. It is free, including shipping.
As far as Bill's questions, the only issue that I don't know is how large
aperture MF lenses will fare wide open. It's possible that at full aperture,
some lens's light cones will be truncated and will have effective transmissions
below what reads on the lens. So the 50/1.2 might act as an f/2.8 lens, even
when shot wide open. I still have a borrowed 50/1.2 and 55/1.2, which are
waiting on the arrival of an E-1 adapater to test this theory.
If my 135/2.8 or 90/2 are as nice as I hope they are, I just might be back in
the market for a nice Tamron 180/2.5 or 300/2.8 to go along with the E-1. But
for sports or fast action, there will be no substitute for the 50-200/2.8-3.5
Zuiko Digital AF lens.
Skip
>
>Subject: [OM] Re: Lets see if I have this correct about OM glass and E-1
>cameras
> From: "Julian Davies" <julian_davies@xxxxxxxxxxxxxx>
> Date: Sun, 4 Apr 2004 02:40:03 +0100
> To: <olympus@xxxxxxxxxx>
>
>
>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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>>
>
>
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