Michael,
I had similar thoughts once that I never acted on. I wondered about
winding thin piano wire around a form to make a large weak spring in the
shape of a bellows, then stitching/gluing the fabric to it. Might work
for some applications. I'll have to try it someday.
Gene Johnson
Michael King wrote:
>
> I've seen a 6x9cm view camera made using a vinyl duct material, the
> trick--as you rightly pointed out--is to get it light proof.
>
> Mike
>
> >I would like to make a suggestion of something I have thought about but not
> >tried. There is a material used by heating and air conditioning installers
> >for flexible ductwork that is very similar to the "Slinky" I played with
> >when I was a kid. It is also similar to the dryer vent hose sold in
> >hardware stores, but is bigger and more rigid. It comes in 6" and 8"
> >diameter (and probably more sizes).
> >
> >I thought that it might work as a bellows material. There are drawbacks. It
> >is made from very reflective foil over a wire frame, but the foil could be
> >painted or covered internally with a non-reflective or flat black material.
> >It is not as rigid as a fabric bellows (although extra long bellows
> >sometimes sag anyway). And it would probably not last as long.
> >
> >But the price is right. It was less than a dollar a foot when I bought some
> >to play with. A foot of it would compress down to much less than an inch.
> >And it is very light.
> >
> >I was going to attach it to the front and back standards with embroidery
> >hoops. This would allow me to change bellows about as easily as changing
> >lenses.
> >
> >Since I am working on another project at this time I wanted to pass the
> >idea along in case someone else wanted to mess around with it.
> >
> >I enjoy the list and appreciate the many things I have learned here.
> >
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