> The K and M are not identical. The K has a 5-5 configuration and > 58mm front element, the M has a 6-5 configuration and a 52mm front > element. So my guess is the K is optacally better (and quite rare > due to only 2 years vs. 7 years of production), but I'm only > guessing, here.
I really will have to try the K. John
