On 07.11.2006, at 13:42 , Anthony Farr wrote:

> I suppose you mean leaf shutters, aka interlens shutters, aka
> Synchro-Compur, aka Copal#0 or 1 or 2 etc.  That design can't be  
> used at the
> focal plane because it begins opening from the centre, and finishes  
> closing
> at the centre, which would cause a huge exposure imbalance between the
> centre of the frame and the corners.  That doesn't matter within  
> the lens
> where the image is still unresolved.
>
> As, well, the aperture of the fully opened shutter would need to be  
> as big
> as the format's diagonal measurement, which is many times bigger  
> than it
> needs to be inside the lens.
Hmmm... so what about central (leaf) shutters in some compact cameras  
and older rangefinder like Minolta Hi Matic or Olympus 35 RC/RD?

Cheers,
Sylwek



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