“ Michael Reichmann, of Luminous Landscape, reports that all his M lenses work fine (with only vignetting from the wide anlges) and there are rumours on Fred Miranda forums that the abominably difficult Zeiss ZM 21 Biogon produces purple fringing (which can be corrected easily), nothing nastier. If true, this means that exceptionnal lenses such as the Leica Summicron-M 28 will work beautifully and that is among the best photo gear news of the decade ! „