Looking to buy or do some horse trading for Canon screw mount lenses for my Canon P. What I'm looking for is a good 50mm 1.2, 1.4, 1.5 or 1.8 lens, preferably a 1.2mm but will take a good 1.4 or 1.5 50mm. I have a couple of Leica lenses, one 35mm and a couple of 50mm collapsible lenses. One of the 50mm is a Summitar f2 in great condition. Any takers?