Re: 35mm in 120 cameras (was: wide angle Bronica filmback

["Willem-Jan Markerink" <w.j.markerink@xxxxx>]

On  1 Dec 97 at 15:12, Clive Warren wrote:

> Brilliant!  Would you care to share your technique with us?  I will be
> using a Koni Rapid Omega 6x7 rangefinder so can happily use the opaque IR
> filter.  The focussing dial is actually marked for IR.  I was thinking
> about modifying a couple of 120 reels to provide "guides" to keep the film
> straight both when re-rolling and winding on.  Of the two methods I have
> developed conceptually, one requires the 120 paper to be cut in 35mm
> strips.......

One big question is whether you really need the paper backing.
Remember, you can't load or unload HIE in daylight anyway, so that 
argument is out (although it wouldn't surprise me if 35mm HIE tucked 
in 120 format backing would be perfectly shielded against all 
daylight, unlike in a 35mm cartridge....).

I also assume there won't be a film counter on the back door.

This leaves us with the potential of scratching the back of the film
(no problem in a 35mm camera though), insufficient film plate
pressure/film flatness problems, and insufficient film transport
because of the thinner layers of film (btw, does any mechanical
transport take into account the *number* of exposures for the exact
amount of transport? The last shot on a roll requires less rotations
of the take-up spool than the first shot, simply because the
additional layers result in a larger diameter on the spool.


- -- 
Bye,

Willem-Jan Markerink


      The desire to understand 
is sometimes far less intelligent than
     the inability to understand


<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]
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