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[OM] Re: Problems with OM 40

Subject: [OM] Re: Problems with OM 40
From: rainer@xxxxxxxxxxxxxxxxxxxxx
Date: Sun, 26 Jun 2005 21:42:23 +0200
Hi Moose,
thank you for your elaborate answer!
Indeed I should havbe been more precise, and perhaps I should try some
more own research before posing such a type of question. In the case I
descibed I used Ilford XP, I did not use the DX setting but eventually
changed the ISO setting for the indoor and outdoor pics between 200 and
800. I had done that before with an XA with decent results. With the
OM40 case, I have to admit that I mostly used program mode. I cannot
recall if I tried AE. I think I should go back and use some slide film
to get clearer answers....
Thanks !
Rainer

----- Original Message -----
From: Moose <olymoose@xxxxxxxxxxxxxxx>
Date: Sunday, June 26, 2005 0:23 am
Subject: [OM] Re: Problems with OM 40

> rainer@xxxxxxxxxxxxxxxxxxxxx wrote:
> 
> >Hi zuikists,
> >perhaps the following is a known problem: 
> >My OM40 does a very decent job in bright light, the esp funktion 
> works>as it should. But as soon as I try to shoot indoors with 
> high speed film
> >(without flash), severe undereposure  occurs. Any ideas for a remedy?
> >Batteries were fresh SR44s. 
> >  
> >
> Three possible problem types possibly mixed here, and knowing more 
> about 
> which it is would make diagnosis easier:
> 
> 1. It sounds like one thing you are saying is that it exposes 
> properly 
> with slower film and improperly with fast film? If you are using 
> the 
> auto DX film speed setting, this coud be nothing more than a dirty 
> or 
> damaged contact or other malfunction in DX reading. This is 
> something 
> you can easily test by comparing the exposure in the viewfinder to 
> that 
> of a known good body or separate meter. If EDX doesn't work and 
> manual 
> setting does, you know what to do. :-)
> 
> Or is it that it exposes properly at higher shutter speeds and not 
> at 
> slower speeds? That sounds like it would need pro help.
> 
> Are you using ESP in both cases? Have you tried regular averaging 
> metering on the indoor shots? I may be wrong, but I believe they 
> work 
> quite differently in auto mode, as do spot and average on the OM-4 
> bodies. In average mode, exposure is TTL OTF. In ESP, I believe a 
> fixed 
> exposure is set just before the shutter is actually released. ESP 
> works 
> by comparing central and peripheral brightness (and average ?). 
> The 
> manual says the main subject must be near the center of the frame 
> for it 
> to work properly. Maybe it gets fooled by odd brightness patterns 
> in 
> indoors situations? Maybe it just isn't as sensitive as regular 
> TTL OTF? 
> Maybe it just doesn't work properly in low light on your example? 
> In any 
> case, I would try some indoor shots without ESP.
> 
> May we assume you are not using Program Mode?
> 
> Moose
> 
> 
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