[Leica] IMG: Lesson Learned

[jhnichols at bellsouth.net (Jim Nichols)]

Clayton,

Thanks for the comments.  I was afraid that someone would say that the 
supposed radiation from the lens glass was the culprit.

Jim Nichols
Tullahoma, TN USA
----- Original Message ----- 
From: "R. Clayton McKee" <leica@rcmckee.com>
To: "Leica Users Group" <lug@leica-users.org>
Sent: Tuesday, October 30, 2007 11:13 PM
Subject: Re: [Leica] IMG: Lesson Learned


> Quoth the Jim Nichols :
>
>> What surprised me is the level of fogging, if that is the proper
>> term, for it looks like grain, that I found in the low-light images.
>> I must admit that the film was not refrigerated.  Is this the
>> experience others have found?
>
> Probably so.
>
> Remember that 400CN is not traditional B&W film and does not have the
> stability of a true silver halide emulsion.  It's essentially C41 dye
> technology using only a single dye layer.  Its stability in terms of
> aging, heat resistance, and fog will be much more in line with a
> color neg film than the B&W we know and mostly love.
>
> 4 years for HP5 isn't a problem, but 4 years out for any color neg
> emulsion that wasn't kept very cold is going to be difficult, to say
> the least.
>
> --
>
>
> R. Clayton McKee                           http://www.rcmckee.com
> Photojournalist                               rcmckee@rcmckee.com
> P O Box 571900                           voice/fax   713/783-3502
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>
>
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