Hi James
> I believe that in auto the om2 like the om4ti I own has OTF metering so
> it monitors the film density hence changes in the light during the
> exposure are taken into account.
correct
> In manual the camera shutter should be
> open for the time you specify regardless of any changes in the light -
> or at least my om4ti works that way.
Correct as well.
> Well if I am right about the om2
> this om2 when set to *manual* *behaves* *exactly* the same way as when
> set to *auto* i.e. set to manual set 1/1000 put on the lens cap - you
> get a loooong exposure. set to manual point at a light set 1second
> exposure and you get a very short exposure. Any ideas what might be
> causing this???
Do you heve readings in the viewfinder?
When in maual, plus-minus brackets should aappear in the left of your
viewfinder. In auto it shows a list of exposure times and a needle
indicator. When set to off, you should only see the needle.
Do you see the various scales? does the needle move in changing light?
An OM-2, when not switched on, still works in auto, it only doesn't give
viewfinder readings.
The off-auto-manual switch has two functionalities, operated simultaneously.
1. mechanically it changes the viewfinder scales
2. electronically it swithces from manual to auto-exposure.
It can be that the switch doesn't switch the electronics, so it always works
in auto.
> I compared the shutter speeds in auto with my om4ti and the om2 (NO FILM
> IN CAMERA) lens set to f16 pointed at a evenly lit wall and just counted
> the seconds the shutter was open and found the om2 consistently closed
> the shutter far earlier than the 4ti I estimate around 1.5 stops less
> light gets in (4 seconds on the om4ti vs around 1 and a bit on the om2).
> is this a reasonable test of auto or do I realy need a film in both
> cameras?
Sounds fine, I guess.
What you could do is cut off for each camera a short pieces of film, and lay
it in. BE CAREFULL that it won't move. A piece of film slipping in your
shutter can demolish the entire contrapion.
On the other hand, an exposure difference that is consequent is not
unimaginable. I'd say 1 or 2 stops over the entire spectrum means that
it needsto be calibrated.
You can be pretty sure that the camera needs to be worked on though.
Cheers,
Bart
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