Funny, our community darkroom just sold a nice one yesterday. I did not have the opportunity to use it but the light pipe diffuses the image. Underneath the light pipe is a condenser. I bet the contrast is similar to a Leica 1C, softer than a B-22 but harder than my LPL MXL 670 dichro head. I cleaned the Vivitar up for the sale and it is not a bad enlarger.