Thanks a lot for the information. I was using the lens maker equation and I
kept getting 100 as a focal length and well that was what made me decide to
post this message. So if I were to use an "ideal" pinhole then I could make
the lens to paper distance 100mm. That would definitely save on building
materials. And the "ideal" pinhole would be calculated by using the 100mm
focal length? I would love to get into large format photography and have
only heard of bellows factor so I will have to look this up. Then again I
have been trying to get my hands on a speed graphic to try out this type of
photography. I cannot wait to start working on this project. I just received
two 8x10 film holders and will have to design the enlarger to meet with
these dimensions. Plus I have to trim down the printing paper to fit into
the film holders. I will let you know what I get as results hopefully soon.
Once I get my lessons ready for the up coming school year. And On a side
note. I would like to thank you for one of your web articles on determining
pinhole exposure. I used it for my research class when I began a unit on
pinhole photography. I think I had 97% of my student really interested in
the project. I focused mostly on the mathematics of exposure and the
chemistry of the developer. This enlarger will be hopefully added to the
unit to get the students more involved with the physics behind the art.
Thanks again. Have a nice day.
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Received on Sat Aug 21 10:33:51 2004
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