Archived posting to the Leica Users Group, 1997/05/26

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: Re: M6 & Infra-red
From: Colin <colinmi@fast.net>
Date: Mon, 26 May 1997 20:12:56 -0600

ROB HEYMAN wrote:
> 
> > Can anyone solve this for me. When using my M6 with Kodak infra red
> > B&W film outdoors in bright sunlight I get a circle of higher density
> > exactly in the centre of the negative.
> 
> > This, of course, results in a lighter toned area which would cover
> > about 2cm on a 9x13 print. It appears to happen only when the aperture
> > is f11 or f16. The circle is quite sharp edged and could be related to
> > the aperture size. This would seem to indicate that the shutter blind
> > is not infra-red light-proof.....a disturbing thought.
> 
> > Has anyone ever had this problem? Can anyone tell me what may be the
> > cause?
> 
>    Thanks in advance,
> 
>    Rob

Rob,

I wouldn't expect the shutter curtain to be infra-red proof, it's just
cloth.  Try keeping a metal lens cap on between shots.

Have fun,

Colin