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Re: [OM] XA2 aperture - fixed or variable

Subject: Re: [OM] XA2 aperture - fixed or variable
From: "John A. Lind" <jlind@xxxxxxxxxxx>
Date: Sun, 16 Apr 2000 21:11:51 +0000
The XA2 is "Program Mode" _only_ with three zone focusing settings.  From
its instruction manual:
  Lens:  35mm D.Zuiko f/3.5, 4 elements, 4 groups
  Shutter:  Programmed between-lens shutter
  Exposure control:  Programmed shutter.  Automatic exposure range
    2 sec @ f/3.5  to 1/750th sec @ f/14  (EV 2.5 - 17)

It doesn't say anything about how the program steps through combinations of
shutter speed and aperture.  It is surprising the shutter is rated to
1/750th!  The practical limit on a leaf shutter is about 1/500th.  Shutter
speeds faster than 1/500th can have problems with producing an even
exposure across the film plane.

-- John

At 00:46 4/17/00 , Chip inquired:
>I  haven't been able  to determine  from the FAQs  or  any other source how
>the aperture on the XA2 is  controlled.  Is it fixed at f/3.5, varied in
>'program' fashion, or changed in some other way?
>
>Thanks,
>Chip Stratton
>cstrat@xxxxxxxxx
>
>
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