LEICA SUMMILUX-M 21mm f/1.4 ASPH. BLACK ANODIZED – Leica Store Philippines

LEICA SUMMILUX-M 21mm f/1.4 ASPH. BLACK ANODIZED

Item Code: 11647
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  • Description
  • Technical Specs

The LEICA SUMMILUX-M 21mm f/1.4 ASPH extends Leica's series of high speed M lenses into the wide-angle range. It offers excellent performance over the entire image field even at full stop and in the close-up range thanks to a "floating element". Stopping down to 2.8 leads to an absolutely outstanding image quality. In fact, in comparison to the Elmarit lens of the same focal length, its rendition is slightly more uniform across the image field.

The vignetting typical of every optical system is naturally more apparent with a super wide angle lens, particularly a high speed one like this, than on standard lenses or those with a long focal length. At full stop with the 35mm format, its maximum - i.e. in the corners of the image - is around 3.2 aperture stops or, with the Leica M8 models and their slightly smaller format, around 1.9 aperture stops. Stopping down to 2.8 visibly reduces this light fall-off towards the image edges to 1.7 or 0.8 aperture stops. Stopping down further does not bring any noticeable additional reduction, as all that remains is essentially the natural vignetting.

The maximum distortion of the lens is 2.3%,which in practical terms is negligible for the majority of photographic applications. A total of ten lens elements are used to achieve this exceptional performance. To correct color aberrations, five of these are made of glass types with anomalous color dispersion(partial dispersion), while a further two have aspherical surfaces. To maintain performance in the close-up range, one group towards the rear of the optical system is a "floating element" that moves independently of the rest of the mechanism.

Lens Connection screw-on type lens hood (included in delivery), filter holder for E67 size filters optionally available
Field Angle for 35 mm and M9 (24 x 36 mm) at 16 mm: 107°, 97°, 74° at 18 mm: 100°, 90°, 67° at 21 mm: 92°, 81°, 60° for digital M8/M8.2 (18 x 27 mm) at 16 mm: 90°, 80°, 59° at 18 mm: 84°, 74°, 53° at 21 mm: 75°, 65°, 46° corresponds approx. to a focal length o
Optical Design, Number of Lenses/Groups 10 / 7
Working Range 0.5 m to Infinity, range from 0.5 to 0.7 m separated by index
Distance Setting, Smallest Object Field for full frame 35mm at 16 mm: 915 x 1373 mm, approx. 1:38 at 18 mm: 833 x 1250 mm, approx. 1:35 at 21 mm: 725 x 1087 mm, approx. 1:30 for M8 digital at 16 mm: 688 x 1032 mm, approx. 1:38 at 18 mm: 626 x 939 mm, approx. 1:35 at 21 mm: 545 x 817 mm, a
Weight approx. 335 g
Aperture Setting/ Function Preset, with click-stops, half values available
Lowest Value 22
Bayonet/ Sensor Format Leica M quick-change bayonet with 6 bit lens identification bar code for digital M models
Filter Mount Male thread, non-rotating and with stop for filter holder or lens hood
Largest Diameter approx. 54 mm (53 x 58 mm with lens hood)

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