At 14:00 2/16/00 , Frank Ernens wrote:
>It isn't an auto lens. Turning the aperture ring on an auto lens tells
>the body to bias the meter reading. On a manual OM lens with preview off,
>it does nothing; with preview on it alters the actual aperture. To use
>this lens you can simply leave the preset on except to focus. If you
>expose with the preview off (out) you will be using f/2.8 no matter
>what the ring says. I have ruined a few shots that way (no depth of
>field). The ADM auto can fix the exposure value.
There is a fixed metal tab located where an auto lens would have one that
moves with the aperture ring. I presume this is to at least fix a meter
bias for wide open at f/2.8.
>The OM-1 has a CdS meter which has a memory effect. Wait a few
>seconds, just as you must when pointing the camera into shade on a
>bright day. The OM-4 has a meter without the memory effect.
Don't have the manual, but suspected this might be what was happening.
After the posting I played with the preview on an auto lens and the meter
needle eventually moves, but does not respond immediately like the OM-4
LED's do.
>BTW I have seen it said that one cannot meter shifted, but I have
>found it doesn't matter, and nor can I think of a reason why it would.
I have used the lens on the OM-4 quite successfully with the lens shifted
and OM-4 in auto mode. It's forgetting to stop down to the desired
aperture first that has bit me a couple times too.
Thanks,
-- John
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