They are at quite a distance from the film.  
> 
> From: Sylwester Pietrzyk <[EMAIL PROTECTED]>
> Date: 2006/11/07 Tue PM 03:00:13 GMT
> To: Pentax-Discuss Mail List <[email protected]>
> Subject: Re: Stupid Q. about central vs. curtain shutter
> 
> 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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