The number 80 jeweler's drill (the smallest that I can find) is
.343mm. This might be a touch large for optimal resolution, but should
give exposure times that are not too long. I use this size in my 100mm
4 x 5 camera. The drill works well in a pin vise, especially if you
smooth out both sides with emery cloth. I use soft drink aluminum, and
blacken the hole with a Sharpie.
Good luck.
Earl Johnson
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Received on Wed Aug 25 15:40:58 2004
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