leicashot
Well-known
test it and if it's really a lemon have it repaired / replaced on warranty?
mine is certainly not as brutally sharp as the asph summicron, but absolutely useable at all apertures, not horrible at all (I have used the asph cron).
At 2.8 the Nokton is as sharp and has less vigetting than the Zeiss 35mm biogon-C, which says a lot about the Nokton's sharpness. I know this because I compared the two when deciding if I should keep the Zeiss.
The Cron ASPH is a very simple lens. Nice sharpness and contrast but plain in drawing, quite like the Lux. The Nokton has a much nicer rendition. Most Lux owners (on the leica forum) tend to disagree with me, so what do i know?