You will love it! I had one years ago and I regret selling it. I bought it as a kit with viewfinder and anti vignetting filter. I gotta tell you it rocked! Enjoy and post some more shots. BTW, that monochrome is a perfect match for this lens since you wont pickup the purple corners from the vignetting.
Thanks Torralba - only got my new 15mm T* Distagom 15/2.8 ZM last week and love it - not got the viewfinder and its not rangefinder coupled but find its not a problem and yes it is a superb lens one that makes you want to go out and shoot with it. ;-)