Re: infrared film counters

["Willem-Jan Markerink" <w.j.markerink@xxxxx>]

On  3 Sep 98 at 20:43, David J. Carlyon wrote:

> My fogging problem is indeed due to the infrared film counter. I had an
> idea, and tried it - I put a little piece of electrical tape over the
> bottom half of the film counter, and shot a roll with it. It did reduce the
> problem greatly, to where it wasn't even noticable in many shots, except
> where there was a predominance of black in the fogged area. A disadvantage
> was that the tape appeared to scratch the negatives from time to time. I
> tried another roll, removing tape, and carefully using a black magic marker
> to ink over the same area, but as I thought might happen, the fogging was
> back, same as before (apparently the magic marker ink is transparent to the
> infrared light). Any other ideas?

I like the 'marker-ink' theory, if only for the resemblance of my 
name....:-))

But: have you carefully checked the foam around that film window?
All camera foam has to be replaced from time to time, be it film
window or back sealing....you might not notice it with ordinary
film, but HIE might be the acid test....this foam replacement is
also a very common & frequent service for medium format camera's &
backs....

Can you rule out that this foam was ever replaced before with a 
cheaper quality, by a non-Canon repair center perhaps?


- --                 
Bye,

Willem-Jan Markerink


      The desire to understand 
is sometimes far less intelligent than
     the inability to understand


<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]
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End of Infrared-Digest V0 #771
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