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[OM] Re: Apertures, where is f22 ?

Subject: [OM] Re: Apertures, where is f22 ?
From: Moose <olymoose@xxxxxxxxxxxxxxx>
Date: Wed, 08 Jun 2005 02:55:42 -0700
David Carter wrote:

>Moose wrote:
>  
>
>>David Carter wrote:
>>
>>>Speculating on aperture shape ...
>>>
>>>Perhaps it gives different aperture values on differing areas of the film. 
>>>Depending on the size & location of the gap?
>>>
>>I don't believe so. Did you look at the link?
>>    
>>
>I've downloaded it for later reading.
>  
>
Well, it has images that will specifically answer your question in it. 
And the answer is no, exposure is even across the frame with strange 
aperture shapes.

>>>Secondly. Same subject from a different viewpoint.
>>>The only irregular apertures I can remember seeing are either on older 
>>>cameras ( 
>>>usually pre-WW2 ) or cheap consumer grade cameras
>>>
>>Have you looked at the diaphram of an XA?
>>    
>>
>Sorry, no I haven't
>  
>
Square.

Moose


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