Ed: With humble gratitude to all on the list, I must confess I can't
imagine measuring a pinhole to the thousandths of an inch. You are right
that a Bolex with a pinhole would work wonderfully, too. I guess I was
hoping to bypass the need for a Bolex. I did build the camera. It
actually required that I buy a $1.50 needle and .79 of dowel rod, no more.
I had a shipping box, etc., lying around. Part of the charm for me is
making this film with as few resources as possible (and few indeed do I
have). My only experience with pinhole photography was one summer as a
child, an art class. I still remember setting the box down on a rock.
But to address the practical matters, you may be right about the
difference between pulling film around a dowel that is bare and pulling it
around a dowel with 50 ft of film on it. Perhaps I can just do a test of
the whole 100 ft and make whatever adjustment I discover is needed. But
also, suppose I have determined the f-stop I need. (Stop me if I should
just read a certain book everyone has.) How does this translate into
exposure time? I realize the f-stop is determined by the focal length and
the hole diameter. Suppose it is 2. Does that mean expose for 2 seconds?
My humble thanks.
Bernie
Received on Wed Nov 15 18:29:32 2000
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