Digital BW, The Print

From: Seth Rossman <seth@...>
Organization: Seth Rossman Photography
Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Date: Monday, September 3, 2012 9:11 AM
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Subject: Re: [Digital BW] Re: What Asa to shoot tmax400 with standard
development

>>Of course, the whole Zone System suggestions to the OP are moot unless
he has either one subject/lighting situation; or, an interchangeable
back system with three backs for push, normal, and pull rolls for
differing subjects and/or lighting. After all, Adams, White, Weston,
etc. had cut film to mark for different situations.

Seth,

Actually you don't need separate backs for 120 roll film to use the Zone
System.
I preferred a Pentax 6x7 and therefore didn't have the luxury of multiple
backs. I used templates to cut roll film if I had to switch development in
the middle of a roll.

The way it is done is by skipping a frame when you want to change
development. That way you have a place to cut: in the middle of the skipped
frame.
It just so happens that the distance from the end of a roll to the middle of
any frame is exactly the same as the distance from the middle of a frame to
the middle of another frame, assuming the same number of complete frames in
between. So the same set of templates serve whether starting from the end of
the roll or cutting out a number of frames in the middle. Mark the templates
with cutouts just like sheet film so you can determine which template you
have in the dark.

I used this method for years and never missed a cut once. Even a single
image length of film is long enough to load into a reel and stay there with
vigorous agitation.

The first thing people think when I tell them about this method is that
skipping frames wastes film. But if you stop and think about it, you are
very unlikely to change development requirements more than twice in the
middle of a roll, and usually only once. The film wastage is negligible
compared to the benefits.


David Kachel

___________________

Artist-Photographer
Fine B&W Photographs

www.davidkachel.com
david@...

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