[MF3D.FORUM:681] Re: Cameras

[Paul Talbot <ptww@xxxxxxxxx>]

Richard Twichell wrote:

> What I would really like is a
> 6x7 advance for 220 film fitted to the Heidescop - 10 pairs with a
> double wind for each shot...but am not clever enough to make one.

Does the Heidoscop roll film back use a red window?
Surely there is no advance counter on that camera,
right?.

Because 220 film does not have paper backing the
film would be fogged by the light coming through
the red window, and there would be no numbers to
read to see how far you had avanced the film.  We've
talked about using 200 in the Sputnik by counting
turns of the advance knob, with the red window taped
over.  But it's an inexact science.

Paul Talbot