I recently won the following lens:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemVersion&item=270491187340&view=all&tid=0
It's a f/5ish, 220mm barrel lens that "apparently" covers 8x10. If my calculations are correct, 220mm is a mild wide-angle on 8x10, so this should work for a box camera, correct?
I should figure out some way to reduce the aperture, or else I'll have to build my camera with focus.
300mm, f/5 for free. You find them in old overhead projectors. They are triplet design, already in a barrel. I mounted one yesterday and it covers 8x10 at infinity. Lets say its sub-zero winter price.
Where do you find old overhead projectors, though? Around here they seem to have passed the point of surplus into the point of "what's an overhead projector?".
As a matter of fact, I found mine in the rubbish. Any school must have some tucked away. It will cost nothing to ask (I asked for old cameras, and got 2 pristine nikon F3 with 250 exp back, different kinds of view finders, all for free). If the overhead projecter are not already trashed, I am pretty sure they are thinking about it and you will give them a service. I can always keep an eye open for you.
Well I got my "ednalight" f/5 apertureless copy barrel lens. It turns out that I could easily remove one of the retaining rings, pull out two of the elements, and insert a homemade stop. A slow process, but possibly even field-achievable. The lens seems to be symmetrical with two large meniscus type elements on the outside and two much smaller meniscus elements toward the middle.
Repromasters and Eskophots are excellent lenses but very hard to shutter conventionally. Available very cheaply.
Pete.
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