Leica Super-Elmar-M 21mm f/3.4 ASPH. 11145 Manuel D’Utilisation
Codes de produits
11145
1
LEICA SUPER ELMAR-M 1:3,4/21mm ASPH.
With the LEICA SUPER-ELMAR 21 mm f/3.4 ASPH., Leica is extending the range of M lenses in the super wide angle range with a
model that combines outstanding reproduction with a compact design.
It delivers uniformly excellent reproduction quality over the entire fi eld of view, with only a very slight deterioration at the edges
in the close-up range. This performance can only be improved slightly by stopping down, which means that you can take photo-
graphs with full stop with no concerns, unless your compositional ideas call for a greater extension of the depth of fi eld that can
only be achieved with smaller apertures.
The vignetting characteristic of every optical system is more pronounced on a super wide-angle lens than on normal lenses and
those with long focal lengths. At full stop in 35mm format it is a maximum, i.e. in the corners of the image, of around 2,1 stops,
around 1,2 stops on Leica M8 models with their slightly smaller format. Stopping down to f/5.6 reduces this light falloff at the
edge of the image – to 1.6 and 1.0 stops respectively. Stopping down further does not result in any further reduction as essenti-
ally only the natural vignetting remains. The maximum distortion of the lens of around 1.5 % is hardly perceptible.
The retrofocus-like construction is made up of a total of eight lens elements, and the use of a lens element with two aspherical
surfaces and four lens elements made of glass types with anomalous color dispersion (partial dispersion) make a crucial contri-
bution towards restricting aberrations to an absolute minimum.
model that combines outstanding reproduction with a compact design.
It delivers uniformly excellent reproduction quality over the entire fi eld of view, with only a very slight deterioration at the edges
in the close-up range. This performance can only be improved slightly by stopping down, which means that you can take photo-
graphs with full stop with no concerns, unless your compositional ideas call for a greater extension of the depth of fi eld that can
only be achieved with smaller apertures.
The vignetting characteristic of every optical system is more pronounced on a super wide-angle lens than on normal lenses and
those with long focal lengths. At full stop in 35mm format it is a maximum, i.e. in the corners of the image, of around 2,1 stops,
around 1,2 stops on Leica M8 models with their slightly smaller format. Stopping down to f/5.6 reduces this light falloff at the
edge of the image – to 1.6 and 1.0 stops respectively. Stopping down further does not result in any further reduction as essenti-
ally only the natural vignetting remains. The maximum distortion of the lens of around 1.5 % is hardly perceptible.
The retrofocus-like construction is made up of a total of eight lens elements, and the use of a lens element with two aspherical
surfaces and four lens elements made of glass types with anomalous color dispersion (partial dispersion) make a crucial contri-
bution towards restricting aberrations to an absolute minimum.
Summary: The LEICA SUPER-ELMAR-M 21 mm f/3.4 ASPH. combines optimum reproduction with compact dimensions, off ering
all M users a wide range of options in the spontaneous super wide-angle photography that is typical of the Leica M.
all M users a wide range of options in the spontaneous super wide-angle photography that is typical of the Leica M.
Lens shape
ASPH.