tom wrote:

> Like I said, this hasn't worked 
> very well for me. The supposed 
> benefit is that you can change 
> filtration without changing exposure 
> time, but I found that I still 
> had to tweak the time a bit.
> 
> Besides, exposures were too long 
> (your lamp isn't really suited to 
> that much filtering) and the charts 
> only give 1/2 grades.

That's the information that completes my understanding.  Thanks.  I
think for now I'll stick with tweaking the Magenta filter and get
easier control of more finite contrast.  You've been most helpful,
Tom.
-- 
Shel Belinkoff
mailto:[EMAIL PROTECTED]
There are no rules for good photographs, 
there are only good photographs.
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