Bingley
Veteran
I haven't used the Nokton, but the Ultron is a great companion for an M2, and worked well with a Canon 7 too:
In weighing the pros and cons of the two lenses, I recommend looking at the photos of RFF member Tuna (in the Gallery), who has used the Ultron almost exclusively for a couple of years; and for the 35 Nokton, I recommend looking at the photos of RFF member Matt (1pt4), who has a really nice set of shots w/ this lens on his website: http://www.1point4photography.com/blog/?s=CV+35+1.4+SC

In weighing the pros and cons of the two lenses, I recommend looking at the photos of RFF member Tuna (in the Gallery), who has used the Ultron almost exclusively for a couple of years; and for the 35 Nokton, I recommend looking at the photos of RFF member Matt (1pt4), who has a really nice set of shots w/ this lens on his website: http://www.1point4photography.com/blog/?s=CV+35+1.4+SC