After shooting with the 35mm Biogon as my only lens for a while now, I've found that it doesn't quite give me the shallow depth of field and subject separation that I've been wanting. Also, I find the 35mm a little too wide for certain shots, while not wide enough for others, so I've been thinking about selling my Biogon and getting myself a 50. I realize that f2 will give me a lot shallower dof on a 50m, but I would still like to grab something a stop faster if possible. I am on a budget, and I'll have to get the replacement for the same price I can get rid of the Biogon for (thinking about ~50,000 yen, like $550?) So far the only thing suitable that I've found is the screwmount f1.5 nokton, which I do find a little too big. I haven't really been able to find anything smaller and with the same speed. Any recommendations? Also, if I do end up sticking with the 35mm, will going a stop faster give me shallower DOF? Right now with the biogon, I get waay too much dof and not very strong bokeh with anything farther than about a meter half. Will the extra make a difference, or not really? Thanks in advance, I look forward to hearing what you guys have to say.