Re: 70mm IR

[Don Roberts <droberts@xxxxxxxxxxxxx>]

Willem-Jan Markerink wrote:

> On  3 May 99 at 14:10, Don Roberts wrote:
>
> > I have been using both the 70mm and 35W ETRSi mags for a year with Lee polyester
> > #25 filters taped to the front of the magazine openings.  You have to make sure
> > the backs latch but I have had no problem otherwise.
> > I made clear rigid plastic covers for the front of the mags to insure that the
> > filters don't get scratched.  I see no reason that #87 shouldn't work.
>
> But a filter more thick than that wouldn't work, right?
> (as indicated by your 'make sure the backs lash', even with the thin
> filter, right?)

That is correct.  I don't think the thicker filter would allow the backs to latch.
As I said I have to be careful even with the 0.1mm filter.  You might be able to
mount one inside the magazine opening (BTFR in other words) but I wanted the filter
as far from the film plane as was feasible to minimize dust and scratch effects on
the film.

==========================================================
  Don Roberts * Bittersweet Productions * Iowa City, IA
              *                         *
  It is better to know some of the questions than all of
  the answers.- Aldous Huxley
==========================================================


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