Hi all,seeking some help and also asking for opinion.The 28,35,50 tri elmar max stop is at f4 while the 50 summicrons max stop is at f2.Would the picture be alot of difference shooting with the MATE at f4 and shooting the 50 crons at f2 under bright condition?I would like to know if the tri elmar would be able to produce nice bokeh even at f4?Also if i usually don't shoot in low light condition would f4 be enough to get very smooth and creamy bokeh?Or only the faster lens like the noctilux,summilux and the summicron would be able to produce very nice bokeh effects?Thanks in advance.