Got this boy for a quite sometime but couldn't have a chance to test it out.     The spherical glass inside is Carl Zeiss Distagon 35mm T/1.4.   Here are some screen grabs captured with Panasonic GH2 camera. All shot wide open @T/1.4             More photos at http://www.flickr.com/photos/au8ust/sets/72157632477645242/   Can't wait to try it on a real shoot!