Yes, the stopdown button (actually a sliding button) is on the adaptall-2
adapter.
The lens itself (without adapter) has only three screws on its mount face.
If you have a stop-down switch on the lens, that sounds like a manual-auto
switch, where the manual setting is actually a preset switch. In that case
the lens would be a pre- Adaptall-2 lens. You can use Olympus OM adaptall-2
or adaptall mounts on earlier Adaptall lenses (or on Adaptall-2 lenses).
Roger Key
At 18:01 2002-10-10 +0200, you wrote:
>The Adaptall-2 has a DOF (stop-down) button.
>The Adaptall (1) has only
>three screws in the mount instead of four.
There's a stop-down-switch on the lens, but on the mount of the lens there
are only three screws......Where are the stop-down button on the
adaptall-2? On the adapter?
// Mattias
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