[rollei_list] Re: OT (sort of) - 120 Roll Film framing dilemma
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Mon, 18 Aug 2008 15:59:32 -0700
----- Original Message -----
From: "Robert Lilley" <54moggie@xxxxxxxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx>
Sent: Monday, August 18, 2008 8:08 AM
Subject: [rollei_list] OT (sort of) - 120 Roll Film framing
dilemma
I have come across an interesting dilemma with regard to
120 roll film.
First, I will tell you of my discovery and I am asking if
this can be
considered true: the frame numbers on the backing paper
are universal and if
the tab is on the left of the roll's start then the frame
numbers denoting
6x9 cm are on top. Otherwise, if the tab is on the right
then the numbers
denoting 4.5x6 cm are on top. The numbers denoting 6x6 cm
frames are always
in the middle.
Second, I don't think these frame numbers have always been
in the same
place. I recently purchased a circa 1930's 6x9 cm roll
film back for my
Voigtlander Bergheil 9x12 cm camera. The back is such
that the film can
only be threaded one way to work. The roll has to be
placed with the tab to
the left so the 6x9 cm numbers are on top. However, the
red window to read
the numbers is located on the roll's bottom where the
4.5x6 numbers are.
This is definitely a 6x9 cm film back and I have looked at
this thing enough
to conclude the roll can only go in this way to work.
Thus, the 6x9 frame
numbers probably migrated from the bottom of the roll to
the top sometime
since the 1930's. Can anyone verify this?
Rob
AFAIK the numbering convention has never changed but I am
not sure that numbers for all three formats were always
printed on the backing. For instance, there are cameras with
two red windows in line so that for the alternative smaller
frame the same number was wound from one window to the next.
Must have been confusing. In a few cameras, notably some
Rollei cameras, there is a red window on the bottom that is
used to set the starting point where frame counting is
automatic. I don't know if this applies to the Bergheil.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
---
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