Re: Realist Notch

[P3D Paul Talbot <ptww@xxxxxxxxx>]

P3D David W. Kesner wrote:
> 
> Am I missing something here about identifying left and right film
> chips? Aren't all films frame numbered? Why don't you just use them?
> In a Realist the film runs from left to right (do all cameras?) so
> the right film chip is always the lower number and the left film chip
> is the higher number. Can it be any simpler, or do I just not know
> what I am talking about *{;-)

David makes a good point; when I place a pair of chips in a mount I
usually check the frame numbers, rather than looking for the withness
mark, to make sure I am not placing them psedoscopically.  But the
witness mark is still useful in many cases.  For example, if you
bracket exposures, especially in small increments, or take multiple
shots of the same scene, looking only at the order of the frame
numbers could result in two left chips or two right chips being
placed in the same stereo mount.

The witness mark is also more useful than the frame numbers for
those who follow the Charles Piper approach to cutting and sorting.
In Installment #50 of The Technical Page, he writes:
    Left and right chips alternate on the film.  A simple
    procedure for cutting is to place all left chips in one
    pile and all right chips in another.  If you don't know
    where to place the next chip, stop and look for the witness
    mark.

(I am too new to cutting my own film to have settled on a cutting
and sorting procedure.  I don't like just stacking them in a pile,
because the piles are too easily disturbed.  Who has a real good
cutting and sorting procedure to recommend?)

Another use of the witness mark, unrelated to mounting, is to
identify which model of stereo camera created the image.

Paul Talbot


------------------------------