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Re: [OM] XA2 aperture - fixed or variable

Subject: Re: [OM] XA2 aperture - fixed or variable
From: "C.H.Ling" <pling@xxxxxxxxxxxxx>
Date: Mon, 17 Apr 2000 23:53:18 +0800
Sorry for the strange characters, here I mean the Olympus µ[mju:]-II.

C.H.Ling


>Although I don't know how they make it, the ?Ê-II works at F11
1/1000s
>max. On the other hand a leaf shutter will not create un-even
exposure
>across film plane like the focal panel shutter.
>
>C.H.Ling
>
>
>"John A. Lind" wrote:
>>
>> 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
>>



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