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Today, Leica has announced the latest addition to the Leica APO-Summicron-SL lineup, the APO-Summicron-SL 28mm f/2 ASPH. Joining the existing four lenses ranging from 35 to 90mm, the new 28mm is the first of the three promised wide-angle Summicron-SL lenses to come. Like its siblings, the 28mm APO-Summicron sets the bar for optical performance in its focal length, and features the same physical dimensions and filter size as the longer focal length options.

Inside the weather-sealed 700g lens is a brand new optical design composed of 13 lens elements, arranged into 10 groups, featuring a whopping six aspherical surfaces and Leica's super-speedy dual-synchro drive autofocus system. Looking at the MFT charts, we can see that wide open at f/2 the lens resolves 40 lp/mm at a staggering 90% contrast. This is seriously impressive optical performance.

A minimum focus of just 24cm allows for a reproduction ratio of 1:5, which when combined with the wide f/2 aperture, should allow for some outstanding subject isolation and 3D rendering. And as the first truly wide angle lens in the APO-Summicron-SL lineup, it's now possible to build out a complete prime lens kit for a wide variety of shooting scenarios.

Availability and Ordering

The Leica APO-Summicron-SL 28mm f/2 ASPH will start shipping this next week for a price of $5,195. Initial quantities will be limited. If you are interested in purchasing the Leica 28mm APO-Summicron-SL, you can do so at Leica Store Miami by clicking the button below, calling 305-921-4433 or sending an email to info@leicastoremiami.com.

 

 

 

MTF Charts

 

Tech Specs

Order Number11183
FinishBlack anodized
View angle (diagonal/horizontal/vertical)75.4°/65.5°/46.4°
Optical Design
Number of lenses/groups13/10
Aspherical surfaces6
Position of the entrance pupil74.2 mm
Focus range0.24 m to ∞
Focusing
SettingChoose automatic (Autofocus) or manual mode on the camera
Smallest object fieldFull-frame: 120 × 180 mm
Largest scale1:5
Aperture
Setting/FunctionElectronically controlled aperture, setting on the camera, half or third values can also be set
Maximum aperturef/2
Smallest aperturef/22
BayonetLeica L bayonet, full-frame 35 mm format
Filter threadE67
Lens hoodScrew-on (included in the scope of delivery)
Dimensions
Lengthapprox. 102/133 mm (without/with lens hood)
Diameterapprox. 73/105 mm (without/with lens hood)
Weightapprox. 700/750 g (without/with lens hood)

 

Press Release

THE APO-SUMMICRON-SL 28 f/2 ASPH.: A WIDE-ANGLE LENS WITH STATE-OF-THE-ART TECHNOLOGY FOR THE LEICA SL-SYSTEM

With the APO-Summicron-SL 28 f/2 ASPH., Leica Camera presents yet another high-performance wide-angle lens for the Leica SL-System. The APO-Summicron-SL 28 f/2 ASPH. is the latest addition to the ever-expanding APO-Summicron-SL series – a lens range that is renowned for its top-level optical performance and extremely fast and reliable autofocus. Following the existing focal lengths of 35, 50, 75 and 90 mm, the APO-Summicron-SL 28 f/2 ASPH. is the first true wide-angle lens in this series. All APO-Summicron-SL lenses feature the exact same dimensions and, consequently, the same filter size. Its angle of view makes the APO-Summicron-SL 28 f/2 ASPH. especially suitable for reportage, interior and architectural photography. Its maximum aperture – which is large for this focal length, yet can be used without any loss of image quality – offers additional creative possibilities through the controlled application of sharpness and blur. Thanks to the L-Mount standard, the APO-Summicron-SL 28 f/2 ASPH. is equally compatible with cameras made by other partners of the L-Mount Alliance that have been equipped with the Leica-developed lens mount.

13 lens elements (three of which feature aspherical surfaces on both sides) in ten groups contribute to a maximum level of image quality even at wide open aperture. As is generally the case with Leica lenses, the maximum aperture is synonymous with the effective aperture. Consequently, there is no need to stop down to increase the image quality – instead, reducing the aperture is only necessary for compositional purposes. Natural skin tones, soft transitions into bokeh, exceptionally contrast-rich details and edge-to-edge sharpness across a distortion-free image: these qualities are very much the norm for Leica lenses. Yet the APO-Summicron-SL 28 f/2 ASPH. is further distinguished by its apochromatic correction, which is a notable feature in a lens of this focal length. To ensure the optimal correction of chromatic aberrations, the majority of the grouped lens elements feature anomalous partial dispersion, and are made of high-quality, specialist glass types whose construction is so elaborate that even Leica’s innovative production methods are utilised to within every last inch of their capacity.

The autofocus drive of all Summicron-SL lenses employs extremely robust and high-performance stepping motors with DSD® (Dual Syncro Drive™). This enables the AF to travel the entire focusing range in around 250 milliseconds. At the same time, Leica Camera also takes an innovative approach to manual focusing technology: Summicron-SL lenses feature an entirely new manual focus ring construction in the form of an embedded ring magnet with alternating north-south polarisation. When the ring is turned, the magnetic field changes its polarity. A sensor monitors the status of the magnetic field and sends the data to the main processor. The drive then shifts the lens to the corresponding focusing position on the basis of the angle of rotation and the rotational speed – this, in turn, enables even faster and more precise manual focusing.

Both the construction and the design of the cutting-edge Summicron-SL series represent the next step forward in the development of lenses for the Leica SL-System. New, extremely precise manufacturing methods and measuring technologies have been developed specifically for the production of these lenses – resulting in more compact dimensions and a considerably lower weight, as well as a truly outstanding imaging performance. In the construction of the APO-Summicron-SL lenses, particular attention has been paid to the prevention of stray light and reflections. In addition to optimising the optical and mechanical design, the developers also reduced unavoidable reflections to an absolute minimum by applying a high-quality coating to the lens surfaces. Thanks to their effective sealing against dust, moisture and water spray, as well as the AquaDura® coating of the exposed lens surfaces, these extremely durable lenses can be used in almost all weather conditions without any reason for concern.

About The Author

Leica Specialist

David Farkas is a self-admitted Leica junkie and an avid photographer since he was seven years old. He also owns and operates leading Leica dealer Leica Store Miami in beautiful Coral Gables, Florida with his wife Juliana. David has years of experience shooting with just about every Leica camera and lens made within the last few decades.

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2 Responses

  1. Mistral75

    There is a mistake in the diagrams provided by Leica. Beginning from the sensor side there are:

    – a single element, a doublet and a single element, for a total of 13 elements, as specified in the text, in the lens cut

    – a single element and two doublets for a total of 14 elements in the technical drawing.

    Reply

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