Mac wrote:
>
> Okay Tom,
>
> Now I really need to try this. I think I will just use 4x5 B&W. You
have
> have already gone over this and I missed it. If i remember you have
two
> slits. One a questionmark shap and the other kind of like a 30
degree
> bent straw. How wide are the slits? 1-2mm?
Right now I have a "library" of about a dozen slits in various shapes
and orientations. Most are about .65mm, crudely measured.
> What is the distance between the slits? Touching oran inch?
The inner slit is usually 3 inches from the film plane; the outer slit
is usually 6 inches.
> What focal length are you using to cover 4x5? inches?
The above configuration usually produces an image that touches the
edges of the 4x5 film plane, but never covers it fully. For the work
I'm doing now, the large black spaces enhance what I'm trying to
accomplish. This is a truthful but windy way of saying "I don't
know."
>
> I assume you are not focusing or use a ground glass?
I'm not.
>
> I have a 5x7 field camera, but this sounds like a job for some black
> foamcore. God I love black foam core.:-)
>
Even after reading the Pinhole Journal articles and the section in
Eric Renner's book about slits, skull density prevented me from
visualizing how to make the camera or to make the slits (or where to
find the time for experimenting). So, a couple of
years ago, I bought a Cardozo camera from Pinhole Resource. It is a
beautiful match of design and craftsmanship. The camera has inner
spacers that let the slits be arranged in different focal lengths.
Black foam core should work great for building a slit camera.
Actually, I bought a large piece a week or two ago to make a slit
camera that I won't mind leaving in the back seat of the car when its
parked outside at night.
Tom
Received on Thu Nov 8 13:02:18 2001
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