Hello everybody. Has anybody handled and/or is using Voigtlander lenses on M cameras? How far are they from the Leica M lenses optical quality, mechanical built and ease of use? Are you using them because they are far cheaper than Leica M lenses or because they are actually good performers very close to Leica quality? And in particular, what's the Ultron 35mm f1.7 like? Thanks in advance for any input on the subject(s).