I am currently looking for a used 13x18 enlarger. I have recently had the opportunity to buy two late vintgage Componon S lenses (180 and 210mm) in mint condition. Eighty per cent of my photography is 6x17 negatives, the rest beeing 5x7 cropped to 85x170 mms (1:2). Would the 180 mm lens be adequate for the above mentioned negative sizes? I would appreciate any comment from somebody with actual experience. I do not intend to enlarge larger than 16x20.