Leica NOCTILUX-M 1:0,95/50 mm ASPH. Notice D'utilisation page 20

The construction is similar to a double Gauss type and uses a total of eight lens elements
to achieve this excellent performance. Of these, five are made of glass types with
anomalous color dispersion (partial dispersion) to correct color aberrations, while
three simultaneously have extremely high refractive power. Because of their large
diameter, the two aspherical lens surfaces are produced by meticulous grinding
and polishing. To maintain performance in the close-up range, the rearmost ele-
ment of the optical system is a "floating element", i.e. it moves independently of
the rest of the mechanism.
summary: The LEICA NOCTILUX-M 50 mm f/0.95 ASPH. represents a unique high
performance lens. It combines exceptionally high speed with an image perform-
ance that ranks alongside that of today's leading lenses and once again extends
the composition options of Leica M photography.
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