Utilising sophisticated optical design technology, with 17 glass elements arranged in 15 groups, including two SLD, three aspherical glass elements and the largest class double-sided aspherical glass element in SIGMA’s history, the 20mm F1.4 DG DN | Art rigorously suppresses various optical aberrations such as sagittal coma flare and image distortion to produce highly-detailed images with exceptional sharpness and accuracy from the centre to the furthest corners of the lens. With its brilliant optical power and its full range of useful features despite its compact and lightweight body, the SIGMA 20mm F1.4 DG DN | Art is the ultimate choice when photographing the night sky.

● Inner focus system
● Compatible with high-speed autofocus
● Stepping motor
● Front filter thread (82mm)
● 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
● Compatible with AF assist (Sony E-mount only)
● Super multi-layer coating
● Aperture ring
● Aperture ring click / de-click switch

● Aperture ring lock switch
● AFL button*

* Only on compatible cameras. Available functions may vary depending on the camera used.

● MFL switch
● Focus mode switch
● Support for switching between linear and non-linear focus ring settings (L-Mount only)
● Petal-type lens hood with lock (LH878-04)
● Compatible with SIGMA USB DOCK UD-11 (sold separately; L-Mount only)
● Designed to minimise flare and ghosting
● Every single lens is evaluated with SIGMA’s proprietary MTF measuring system
● High-precision, durable brass bayonet mount
● “Made in Japan” craftsmanship

Our new lineup fully expresses our approach to lenses and photography itself. All of our lenses belong to one of three lines—Contemporary, Art, or Sports—all of which share our development philosophy and advanced manufacturing system. High performance, high quality, and high end in every respect, these lenses give people who love photography lasting value and consistent, exciting results. The secret is our passion for craftsmanship that we put into every production process and every product.

We used to measure lens performance with MTF measuring system using conventional sensors. However, we’ve now developed our own proprietary MTF (modulation transfer function) measuring system (A1) using 46-megapixel Foveon direct image sensors. Even previously undetectable high-frequency details are now within the scope of our quality control inspections.

* A1: Aizu1

All Sigma’s manufacturing – right down to moulds and parts – with a few exceptions, are carried out under a single integrated production system, entirely in Japan. We are now one of the very few manufacturers whose products are solely “made in Japan”. We like to think our products are somehow imbued with the essence of our homeland, blessed as it is with clean air and water, and focused, hard-working people. We pride ourselves on the authentic quality of Sigma products, born of a marriage between highly attuned expertise and intelligent, advanced technology. Our sophisticated products have satisfied professionals and lovers of photography all over the world because our manufacturing is based on genuine craftsmanship, underpinned by the passion and pride of our experts.

As an experienced lens manufacturer that has been creating a diverse range of interchangeable lenses, we have started the innovative chargeable service “Mount Conversion Service”. With this service, the mount of your current SIGMA lenses can be changed to another mount of your choice. It gives a new life to your favourite lenses when you wish to use it on a different camera body.

* This “Mount Conversion Service” is different from a normal repair. In order to apply for the service, please contact your nearest authorised subsidiary/distributor of SIGMA.