- Compact and robust 50mm prime lens with wide maximum aperture and outstanding optical performance
- All new optical formula along with a new focus motor ensures sharp results and great autofocus performance
- L-mount lens supports switching between linear and non-linear focus ring settings for videography with a compatible body
- Comprehensive barrel controls for a fast workflow and customisation including programmable AFL and de-clickable aperture ring
- Weather sealed mount, fluorine coating and Sigma’s Super Multi-Layer Coating to reduce ghosting and flare
Key Features
- Compatible with  (available separately)
- Support for switching between linear and non-linear focus ring settings
- Compact and lightweight design exclusively for mirrorless cameras
- L-mount bayonet fits , Â and Â
- Outstanding optical performance
- Ultra-wide f/1.4 aperture for low light handholding
- 11-bladed aperture renders rounded bokeh with smooth out of focus areas
- Latest ultra-fast HLA Autofocus motor
- Dust and splash-resistant structure
- Manual aperture ring with de-click switch for video recording
- Customisable AFL button and Focus Mode switch
- Smooth rubberised focus ring
- Reduces flare and ghosting with backlit subjects
Sigma 50mm f/1.4 DG DN Art Lens for L-Mount Summary
The release of the Sigma 50mm f/1.4 DG DN Art Lens for L-Mount cameras brings another high-speed prime to the comprehensive range of . The compact 670g design has been optimised inside and out for mirrorless users, with a new high speed focus motor, new optical formula and lens barrel controls to support professional workflows.
This L-mount version also provides the added benefits of being compatible with the USB dock as well as supporting linear and non-linear focus ring settings, when mounted on compatible cameras.
These features ensure the Sigma 50mm f/1.4 DG DN Art Lens is ideal for all sorts of subjects, whether capturing portraits, weddings, street or landscape photography, and of course for video.
Sigma 50mm f/1.4 DG DN Art Lens for L-Mount in More Detail
Outstanding optical performance
This mirrorless full-frame lens delivers sharp results across the frame, particularly towards the edges. In order to achieve such a high level, the SIGMA 50mm F1.4 DG HSM | Art employs the latest optical technology, with 14 elements in 11 groups. Optics include one SLD (Special Low Dispersion) element and three aspherical elements. These deliver significant improvements to sagittal coma flare whilst effectively suppressing aberrations including astigmatism and field curvature, which cannot be corrected digitally. Even when working wide-open at f/1.4, photographers can be assured of razor-sharp edge-to-edge results.
New ultra-fast AF motor
The Sigma 50mm f/1.4 DG DN Art Lens is the first mirrorless Art lens to incorporate Sigma’s new HLA (High-response Linear Actuator) autofocus motor technology. This delivers fast, accurate and near-silent focusing, with exceptionally fast tracking performance, despite an ultra-wide aperture. Sigma’s optical engineers were able to use a single double-sided aspherical element as the focusing lens, due to the power of the new HLA motor. This has delivered autofocus and optical design benefits, which is faster in every way.
Low light performer
The 50mm standard prime lens boasts an ultra-wide f/1.4 aperture, making it ideal for low-light photography and interior shoots, which can include concerts, interiorsand weddings. It also renders an extremely shallow depth-of-field with high background blur, which is perfect for creating portraits which pop. The bokeh is smooth and attractive with nicely rounded bokeh balls, thanks to the lens’s 11 diaphragm blades.
Compact and robust build
During its development, every effort was made to reduce the thickness of the 50mm F1.4 DG DN lens barrel by reducing the weight of the focus lens and optimising the layout. This allowed  to create a compact and lightweight design, weighing just 670g, which feels well-balanced when mounted on full-frame mirrorless cameras. The superb build quality meets the high standards expected from a Sigma Art line lens, whilst simultaneously complementing the high optical performance.
Professional ergonomics
Aside from a manual aperture ring, with Click switch, the lens barrel is equipped with a range of useful functions. Having a de-clickable aperture allows users to switch between stepped, third-stop increments and a smooth, click-free action. This is useful for videographers who need to adjust the aperture silently while filming. The aperture ring can also be locked with lock switch. The lens also features a customisable AFL button, which can be programmed to control a variety of different functions (depending on camera model).
You’ll also find a Focus Mode switch, rubberised focus ring with a smooth, fluid-like movement and a robust, petal-type lens hood with lock button to support professional workflows. The hood also has a rubberised grip for easy attachment and removal.
Made for outdoor creators
The 50mm F1.4 DG DN | Art is suitable for use in difficult shooting conditions, thanks to a dust and splash-resistant structure, rubber seal around the L-mount and a water and oil repellent front-element coating. The outer barrel is constructed of TSC (Thermally Stable Composite), which has a similar thermal expansion rate to aluminium. This means the metal inner barrel and the TSC outer barrel behave in a similar way as temperatures change, ensuring a consistent performance in all environments. Both materials are very light, with the lens weighing just 670g.
As with all , the 50mm f/1.4 DG DN Art is crafted using cutting-edge manufacturing technology at Sigma’s factory in Aizu in Japan. Every single lens is evaluated with a proprietary MTF measuring system before leaving the factory, ensuring consistently excellent products that photographers can rely on.
Other features
- Internal focus system
- Compatible with high-speed autofocus
- Compatible with Lens Aberration Correction
Function available on supported cameras only. Available corrections and auto correction functionality may vary depending on the camera model.
On cameras where lens aberration correction is controlled with ‘ON’ or ‘OFF’ in the camera menu, please set all aberration correction functions to ‘ON’ (AUTO).
- Support for DMF and AF+MF
- Super Multi-Layer Coating
- Water and oil-repellent coating (front element)
- AFL Button
Only on compatible cameras. Available functions may vary depending on the camera used.
- Aperture Ring
- Aperture Ring De-click Switch
- Aperture Ring Lock Switch
- Focus Mode switch
- Designed to minimise flare and ghosting
- High-precision, durable brass bayonet mount
- ‘Made in Japan’ craftsmanship
- Every single lens is evaluated with Sigma’s proprietary MTF measuring system
Sigma 50mm f/1.4 DG DN Art Lens for Leica L-mount Specifications
| Lens construction | 14 elements, 11 groups (1 SLD and 3 aspherical elements) |
| Angle-of-view | 46.8° |
| Number of diaphragm blades | 11 (rounded diaphragm) |
| Minimum aperture | F16 |
| Minimum focusing distance | 45cm |
| Maximum magnification ratio | 16.8 |
| Filter size | f72mm |
| Dimensions (max diameter x length) | f78.2mm x 109.5mm |
| Weight | 670g |
Sample images
© Maike Wittreck. Sigma 50mm f/1.4 DG DN Art Lens mounted on . Camera settings: 1/160 sec. f/1.6. ISO 100
© Elliot Aubin. Sigma 50mm f/1.4 DG DN Art Lens mounted on . Camera settings: 1/800 sec. f/1.4. ISO 200
© Etsuko Aimu. Sigma 50mm f/1.4 DG DN Art Lens mounted on . Camera settings: 1/2000 sec. f/1.4. ISO 100
© Elliot Aubin. Sigma 50mm f/1.4 DG DN Art Lens mounted on . Camera settings: 1/500 sec. f/1.8. ISO 800
What’s in the Box
- Sigma 50mm f/1.4 DG DN Art Lens for Leica L-mount
- Case
- Petal Type Hood with lock (LH782-02)
- Front Cap (LCF-72 III)
- Rear Cap (LCR II)
| Offers: N/A |
| Offer Category: N/A |
| Offer Product Type: N/A |
| Autofocus: Yes |
| Aperture ring: Yes |
| Constant Aperture: Yes |
| Lens CIPA Image stabilization rating: N/A |
| Colour: N/A |
| Diameter (mm): 78 |
| Length (mm): 110 |
| Weight (g): 670 |
| Distance scale: N/A |
| DoF scale: N/A |
| Elements: 14 |
| Environmental Sealing: N/A |
| Focus distance limiter: N/A |
| Focal length: 50 mm |
| Focus method: N/A |
| Filter Thread: N/A |
| Full time manual: Yes |
| Groups: 11 |
| Hood supplied: Yes |
| Lens Image stabilization: N/A |
| Lens mount: N/A |
| Lens Materials: N/A |
| Maximum focal length: 50 |
| Maximum magnification: 0.15 |
| Maximum aperture (number): 1.4 |
| Maximum aperture (text): N/A |
| Max Format size: N/A |
| Minimum focal length: 50 |
| Lens Minimum focus distance (m): 0.45 |
| Minimum aperture (number): 16 |
| Minimum aperture (text): N/A |
| Motor type: N/A |
| Number of diaphragm blades: 11 |
| Power zoom: N/A |
| Special elements / coatings: 1 SLD and 3 aspherical lens. Super Multi-Layer coating and water and oil repellent coating. |
| Tripod collar: N/A |
| Lens type: N/A |
| Wide/Tele: N/A |
| Lens Level: N/A |
| Best For: N/A |
| Best For Holiday and Landscape: Yes |
| Best For Interior and Architecture: N/A |
| Best For Fashion and Portrait: Yes |
| Best For Macro and Still Life: Yes |
| Best For Astro: Yes |
| Best For Street: Yes |
| Best For Wildlife and Sport: N/A |
| Zoom lock: N/A |
| Zoom method: N/A |
| Notes: N/A |




















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