This is my guess.
Regular lenses are not flat-field lenses, and at close-focus ... would
probably produce distortion , or edge softness.
You could probably, however, use macro lenses , or bellows lenses by
the various manufacturers (plenty in M42) , but at that cost, you're
better off with an enlarger lens.
Off ebay, I got an isco-gottingen enlarger lens for US$5.
At 07:29 5/14/01 -0700, you wrote:
>Richard and Cameramakers,
>
>I'm thinking of making an enlarger. What are the optical implications
>of using a camera lens as an enlarging lens? My suspicion is that the
>typical lens has had it's optical properties optimised for objects far
>away, and that projecting an image from a negative might be less than
>ideal. I have several good quality lenses in various focal lengths so
>the idea is tempting. I want to build an enlarger to handle everything
>up to 4x5.
>
>Gene Johnson
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