I have no idea when it comes to darkroom equipment, so please help me out. I found this thing: http://www.thephotoforum.com/forum/showthread.php?t=49396 Question 1: I want to put a 50mm on it, but if my calculation is correct, I will not be able to focus except for very small prints. This calls for a flat lensboard. Can I improvise? What's the part number? Where can I get one cheap? Question 2: The condenser is a variable condenser head for 4*5 film. If I use it for 35mm film, does it mean that I'm losing 95% of the light? I can adjust one of the lenses to different heights to suit different lenses. Question3: Is the rodenstock omegatron 135mm f/4.5 a good lens? It looks like a four element design. Thanks everybody!