The optical structure of the LEICA SUMMILUX-M 50mm f/1.4 ASPH. consists of
eight lens in 5 groups. Glass with anomalous partial dispersion (elements 2/3)
was used to ensure correct color rendition.
Lens element 2 is made of a fluorite-type glass while lens element 3 is made
from glass originating from the former Leitz glass laboratory. Lens element 4
has an aspherical surface. Lens elements 1, 6 and 7 are made of glass with a
very high refractive index to minimize monochromatic aberrations.
In all every innovation currently available in lens technology - aspherical
lenses, glass with anomalous partial dispersion (APO), glass with a high
refraction index and a floating element - has been combined to create a lens
that will set new imaging standards.
This is the first Leica M lens with a specifically patented 'floating
element' used to maintain imaging performance at a very high level even in
close-focus ranges down to 0.7m.
During focusing, the rearmost optical component (elements 7/8) moves relative
to the rest of the optical system and produces brilliant image quality in near
To maximize the benefits of the 'floating element' an extremely precise
adjusting mechanism has also been utilized that had to fit into the restricted
space inside this compact M-lens.
At full aperture, the LEICA SUMMILUX-M 50mm f/1.4 ASPH. offers high contrast
rendering even for the finest structures. This performance can only be raised
slightly by stopping down. Another notable feature of this lens is that it is
The normal vignetting for such high-speed lenses at full aperture is strongly
reduced by stopping down slightly. Furthermore, the use of the most advanced
coating technology ensures a high degree of anti-glare.
The LEICA SUMMILUX-M 50mm f/1.4 ASPH. also offers special features in terms
of its handling: The built-in lens hood not only provides protection against
stray light and dust, it can also be locked in the extended position to guard
against accidental retracting.
In addition to the familiar knurled ring, the lens is equipped with a finger
grip that allows easy focusing using one finger. The balanced proportions of the
lens also provide comfortable usage for longer periods of time.
||5 Groups/8 Elements
Aspherical surfaces 1
|Angle of view
||47°, 40°, 27° (diagonal, horizontal, vertical)
|F stop range
|Closest Focusing Distance
|Dimensions (Length x Diameter)
||Aprrox 2' x 2")