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RE: [OM] pinhole OM

Subject: RE: [OM] pinhole OM
From: "Harridge, Wayne" <Wayne.Harridge@xxxxxxxxxx>
Date: Fri, 29 Oct 1999 08:26:16 +0800
imagineero wrote:

> 
> It is possible to make pinhole plates yourself, though 
> they're not very 
> good.  There is always difraction caused by the hole not 
> being perfect.  The 

Diffraction is a physical result of having a small hole, imperfections will
only modify the diffraction pattern.  If you are concerned about
imperfections, why use a pinhole at all ?

> best one's seem to be made by lasers on ultra thin plates.  
> There was a guy 
> on the web selling them for reasonable prices $20-$50 I 
> think, but I've lost 
> his address.  i will have another look for it and post it if 
> I find it.
> 

Why would you spend that amount of money on a 50mm focal length pinhole when
you can buy a good used 50mm f1.8 from Olympus Guy for the same price ? 

Wayne Harridge
Ivanhoe, Victoria, Australia
http://www.geocities.com/Paris/Louvre/6152/ 

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