HM this isn't quite the correct way to do this but yes that is what I want to do except that I don't have an enlarger- I am not a photo buff just an electronics tech with a need and some experience in a large photofinishing lab. I can cope with most of this . my main need is contrast not depth of field. So I should not need too critical an exposure just a consistent one and I can control that with a shutter and a timer.(posted 8791 days ago)