Archived posting to the Leica Users Group, 2000/02/19

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Subject: Re: [Leica] Vignetting
From: Mark Rabiner <mrabiner@concentric.net>
Date: Sat, 19 Feb 2000 14:08:44 -0800

Mike Johnston wrote:
> 
> >>>Can you explain why the film thicknes matters?<<<
> 
> Tom,
> Not really, although I could surmise based on simple geometry. But it
> does seems to matter. Very thin-emulsion films show vignetting much more
> clearly. If you don't believe it, take a lens known to vignette and
> shoot the same scene on Ilford 100 Delta and Tri-X. The Delta will show
> more vignetting. ><Snip> 
> --Mike

Now that's thin film!
When I was ready to run my second batch of Delta 100 the night before last I
very carefully grabbed a roll which was hanging to dry to put it up to the light
table to check the density so i might tweak the time for the second batch. It
turned out to be completely dry I didn't have to be very careful with it after
all. It completely dried in just over an hour. Just like Panatomic in the old
days. I love not having to wait overnight for my film to dry before making the
contacts. Sounds like a small issue but it makes for a much smoother working
system for me.
Like I just said I think it's better in Xtol than Pan F in Rodinal.
Mark Rabiner