Hi folks, was walking around Peninsula yesterday and came across a nice condition Leitz Super Elmar - R 15mm f/3.5 adapted to F mount. Anybody used this lens on digital bodies before? How does it work out? Did some research and found that its using Zeiss's Distagon design. If its good, could be a cheaper(relatively speaking) and smaller alternative to the 15mm f/2.8 ZF.2. Its built like a tank though. Almost 1kg but is no bigger than an 85mm f/1.4. Thanks!