The DOF button for Olympus-mounted Adaptall 2 lenses ... is on the Olympus
mount, so you will have to wait for the mail man. When fitted on the
Olympus mount, the diaphragm works just as a Zuiko does - setting the
diaphragm from 2.8 to 32 makes no difference until the shutter fires ...
unless there is a problem with the lens body - take off the Adaptall mount
to check. Do this by opening the lens to full aperture, then press in the
button on the lens at 5 o'clock near the mount, and turn the mount
anti-clockwise. Inside the lens near the mount release button there is a
wheel mounted on a lever which actuates the diaphragm. Set the diaphragm to
f/22 - it should remain at f/3.5 until you push the wheel/lever in to close
the diaphragm.
The AE setting has no function specific to OM cameras - it is simply the
minimum aperture of the lens.
I have the later version of this lens (no filters), so cannot be sure, but I
suspect the "ring-thingy" is useful also for fitting filters (aside fron the
built in filters) such as a polarizer, maybe? If it is anything like the
B6FH (for the later version) the 20FH hood is a petal shaped monster which
you would easily recognize.
Piers
-----Original Message-----
From: owner-olympus@xxxxxxxxxxxxxxx [mailto:owner-olympus@xxxxxxxxxxxxxxx]
On Behalf Of Bernard Frangoulis
Sent: 28 July 2003 15:41
To: olympus@xxxxxxxxxxxxxxx
Subject: [OM] Questions on Tamron 17mm
I have received today a Tamron 17mm lens bought on *bay. It is the
older version (the one with filters). It comes with an Adaptall ring
for Contax, so I cannot test it immediately (the Olympus OL ring is
in the mail!). I have a few question for the Adaptall-savvy among
you...
I was very surprised by the behaviour of the diaphragm ring: its
rotation has an immediate effect on the aperture. Is this normal? On
Zuiko lenses, you have to press the DOF button for the diaphragm to
close. But since this is my first Adaptall lens, I don't know what to
expect.
And by the way... where is the DOF preview button on this lens?!!!?
What is the "AE" setting on the diaphragm ring?
And finally, the lens has a hood of sorts, rather a shallow metal
ring thingy which is only useful for the lens cap. I suppose this is
not the 20FH hood which is supposed to fit this lens?
Bernard
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