I own a 1.2/35 since a year as the main lens for my Leica M6. I do mainly street photography on Tri-X and Tmax 3200. If I only have one camera and one lens with me it is in 90% of the cases this couple.
What I like:
- Outstanding mechanical quality. Focussing is much smoother than with my Summicron 2/50. Very good metal hood.
- The lens is sharp, but does not give too much contrast. For street photography that is fine, for landscapes I would not use it.
- The lens is expensive, but compared to Leica lenses it is still a snap.
- At 35mm you can really use it at 1.2 because there is still something like a very small depth of field. But you need to focus very carefully. I bought a Leica screw-in loupe to enlarge the finder view, guess why.
What I dislike:
- It is huge and heavy. When you carry the camera body and lens for a while you will remember that you carried it.
- The lens is so big that the bottom right corner of the finder shows you the lens - about 20% of the finder view is blocked. As I keep both eyes open I know what happens outside the visible field, but this is annoying.
- The lens is so big that the lens release button of my M6 is almost covered by the lens. Maybe it does not want to leave the Leica in order to be used forever? You can change the lens as long as you do not wear gloves.
- The black paint shows some wear after very short use so that even a quite new lens will tell you that there is brass underneath the paint.