Despite it's age, this lens shows good sharpness from wild open (though most 135/2.8 do). What catches my attention first is the very nice bokeh, considering it's just a f2.8 lens. It would be interesting to compare it to Nikon's 135/2.8, but I've sold mine long time ago. The original filter comes with it adds quite a bit chance of flare, it's better to remove it if shooting with DSLR. (F mount converted and tested on D3.) By the way, 1-cam version is really not for mount conversion, you have to machine the cam off the lens. I'm only buying to deliberately have all German made Leica, which plays its part in the hype about Leica. What I have found out so far just don't quite support the hype though.