I had the first version, and I recall it causing quite a sensation in the Leica community when it was released, both for it's excellent performance and modest price. As depth of field is very deep at f/8, I didn't find lack of rangefinder coupling an issue. But it wasn't designed with a digital sensor in mind, and I recall it being marginal in the corners with M8, and pretty bad with the M9's FF sensor. Think if you wish to use it with a digital sensor, you may want the 3rd version.