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Re: [OM] WPPD 2010

Subject: Re: [OM] WPPD 2010
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Sat, 01 May 2010 09:17:46 -0400
According to the calculator here 
<http://www.cambridgeincolour.com/tutorials/diffraction-photography.htm>
The diffraction limit on my 5D (12.7 MP on 35mm format) at f/128 would 
be about 0.025 megapixels.  That's interpolated since the calculator 
only goes to f/64.  However, the interpolation is easy since the airy 
circle simply doubles in size for each full step in smaller aperture. 
It's obvious that to get much detail from a pinhole camera you've got to 
use a much larger format.

Chuck Norcutt

Piers Hemy wrote:
> Chromatic aberration influenced by the minute aperture, maybe?
> 
> What is the diffraction limit of a pinhole?
> 
> Piers 
> 
> -----Original Message-----
> From: Wayne Harridge [mailto:wayneharridge@xxxxxxxxxxxxxxx] 
> Sent: 30 April 2010 14:01
> To: 'Olympus Camera Discussion'
> Subject: Re: [OM] WPPD 2010
> 
>> Nice - but B&W surely!!!
>> Andrew Fildes
> 
> I probably should have converted it to b&w.
> 
> Anyone like to explain to me why the colour balance never seems correct with
> pinhole shots ?
> 
> ...Wayne
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