The Leica M9 is, as many have suggested, simply an M7 that has a full-frame digital sensor. This is actually a key aspect of both the M9's successes and failings. The M7-design part is the core of the success: a long-proven design sits at the heart of the M9. But the digital aspect is at the center of the failings, in my opinion.

Let's start with the central M-series design issue for Leica. One of Leica's strengths is its lenses: high quality prime lenses that are small and very capable. One of Leica's weaknesses is its lenses: the rangefinder aspect of the M series means that really only the 24 to 90mm range is well served by the viewfinder and focusing system; the wider than 24mm lenses often tend to be focused by zone or DOF rather than visually. Basically, the M rangefinder system plays well with manual focus primes in a fairly narrow focal length range. This, in turn, dictates the use of the camera. The M bodies are not sports cameras. They're not wildlife cameras. They p...