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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