40mm comparison - rokkor/leica vs VC nokton

Can any users make comments on these lenses please? I'm looking to buy one of them.

I've been using the 40mm Summicron-C for eight years. Adore it. Crisp, contrasty, flare-resistant, makes mostly nice bokeh; small, low in profile, light in weight, pocketable. Doesn't make my pictures look distorted. It's also got a b#st#rd filter thread, and its peculiar rubber hood is neither cheap nor easy to find.
 
I can't imagine that this exact question is new or unique on RFF.

I've owned and used the Summicron-C 40/2, M-Rokkor 40/2, M-Rokkor 40/2 gen II (CLE), and Nokton 40/1.4 MC lenses. They are all excellent.

The Summicron and M-Rokkor are both excellent and nearly impossible to tell apart. The M-Rokkor gen II is slightly better on flare as it is multicoated (the other two are single-coated). The biggest difference between the Summicron and the M-Rokkors is that the latter have a standard JIS 40.5mm filter thread where the Summicron has the German DIN filter thread. It's a lot easier to find 40.5mm filters.

The Nokton is, of course, the fastest of the bunch. It's wide open rendering is very good if a bit harsher than the other three in some scene types. At f/2 and f/2.8 or smaller openings, the rendering is pretty hard to tell apart from the other three. The MC version has excellent flare control and contrast, the SC version was specifically designed to be slightly lower contrast, more akin to late-1950s, early 1960s generation fast lenses for B&W photography.

They're all very sharp and all make superb photos. I currently have the M-Rokkor 40mm f/2 gen II semi-permanently affixed to my Leica CL body, and I use the Nokton 40/1.4 MC with the GXR, M9, and M4-2.

G
 
I can't imagine that this exact question is new or unique on RFF.

I've owned and used the Summicron-C 40/2, M-Rokkor 40/2, M-Rokkor 40/2 gen II (CLE), and Nokton 40/1.4 MC lenses. They are all excellent.
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G

My thoughts echo Godfrey's almost verbatim, I've also owned numerous Cron-C 40/2, M-Rokkor 40/2, Gen II of the Rokkor 40, Nokton 40/1.4 MC and SC lenses and honestly the Cron-C 40 is my favorite of the bunch, optically probably the Gen II Rokkor for the coatings and filter selection.
 
I did a lens comparison in which 35mm-40mm lenses were compared. They included the 40/1.4 and the 40/2. The CV 35/1.4 was not out yet.

Take a look at Roland's website:

Link: http://ferider.smugmug.com/Technical/Raids-35-40mm-Lens-Test

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