Love my Sonnar
I have had the ZM T* 50mm f/1.5 Sonnar for about a month now, and have absolutely no complaints. I have not experienced any of the focusing difficulties that others have described. The pictures I have taken have been tack sharp, the OOF is creamy and beautiful, and the transition from sharp to soft very natural in appearance. I am extremely pleased with this lens. It has become my 50mm of choice, relegating the Leica 50mm f/1.4 ASPH to uses requiring clinical sharpness without the Sonnar signature. I recommend it highly.
LJ Segil