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What's up everyone, hope everyone is doing well today thought id try to get a question cleared up...I saw a video on youtube by Roger Jennings and in this video he goes in depth about how to build "the perfect" exposure unit...Roger States The Distance From The Glass & Light Bulb Should Be The DIAGONAL DISTANCE of the biggest image you can print MULTIPLIED BY 1.55 What am I measuring the diagonal distance of? My 13x19 film or my 20x24 screens?? Any input on the math formula or tips on other ways to reach the right amount of distance is appreciated!
