Hello, I'm returning to my darkroom after a regrettably long absence. I've hit a frustrating problem I wondered if anyone here could shed some light on (so to speak...). I have an Agfa C66 which is a re-branded Durst M605, I have two enlarging lenses an 80mm and a 50mm. I've only ever used the 80mm lens which has been fine for my medium format work and the occasional small 35mm enlargement. I'm now wanting to do more 35mm work. Using the 80mm lens for this means that for a 10x8 enlargement I have to have the enlarger head almost at the top of the column giving unacceptably long exposure times. I decided to give the 50mm lens a go, but I can't seem to make enlargements bigger than about 13x18cm (5x7"). At this size the focusing stage is up as far as it will go and the bellows is completely compressed making it impossible to focus the image if I try to go any larger. I'm obviously missing something fundamental here. I know I should be able to enlarge to well over this size with a 50mm lens so I must be doing something wrong. Does anyone have an idea of what that might be? Many Thanks, Ben.