If you are shooting 6x9, try to look for Schneider Tessar type or another one is Hailar 105 mm, and you can find one really cheap off of 6x9 folder or just by searching around. there are lots of them around, extremely small and light, and surprisingly sharp, but expect to pay good money for a clean one. I have a 90 mm Xenar and very happy with results it produces, when the size and weight is issue I use this tiny one, instead of my 90 mm Rodenstock. the main question is what are you looking for? and what can you do with and in what areas are you willing to make a compromise.