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| Cameras & Camera Accessories Large format cameras of all types and sizes. |
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21-Aug-2005, 22:43
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#1 |
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Join Date: Aug 2005
Posts: 3
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DIY Projector using a LF Process lens
Hello!
I have a little different question for this board. I am currently collecting parts for a DIY projector. The problem I have is finding a projection lens that meets these requirements: 1. A viewing circle large enough to "see" a 17" (diag) LCD screen 2. A focal length between 480mm and 550mm 3. A lens diameter large enough to "see" a light arc 27mm long going through first a 220mm FL fresnel and then a 550mm FL fresnel (so the arc would be about 68mm by the time it gets to the projection lens) 4. Relatively inexpensive to find on either ebay or a surplus, etc... My set up goes: Bulb -> 220mm (maybe 330mm) fresnel -> 550mm fresnel -> LCD -> Projection lens My basic question is: Does a process (large format) lens exist with a viewing circle of 440mm+, a focal length of 480mm, and a lens diameter of 80mm+? Thanks for any info you can provide! |
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