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Re: [OM] Night exposures with OM-2SP - warning long message, but ON t

Subject: Re: [OM] Night exposures with OM-2SP - warning long message, but ON topic
From: wayneharridge@xxxxxxxxxxxxxxx
Date: Thu, 28 Sep 2000 11:18:33 +1100
Frieder wrote:

> This is a strange effect, but it is exact what the meter does.
> >From F1.4 -> F1.2 the exposure indicator of my OM 2sp moves 1~1.5 Index 
> >fields
> ( 1/3~1/2-F-stop) instead of 3 for a hole F-stop.
> This is caused due to the lever which is telling the camera how much the lens
> is stopped down. The marks between F 1.4 and F 2.0 are nearer together than 
> the
> others which causes this difference. So it seems it is what the lens does.
> This phenomen is visible on every Zuiko I have. The first F-stop is not a 
> whole F-stop  ( at least one index missing). It is hard to guess why this is 
> so and weather it affects the real speed of the lens?
> Seems exposure with internal meter should always be correct,
> but when working with a hand-held-meter? 

That's interesting !

Also note that I measured exposure time with a stop watch (admitted, not that 
accurate) from the auto OTF measurement made by the body.  I should really 
check this with some other lenses.

...Wayne


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