The SIGMA 24-70mm F2.8 DG DN for mirrorless cameras is the standard zoom of choice for many professional photographers. With its superb image quality, fast AF, highly versatile focal range and fast F2.8 constant aperture, it can be used for almost any type of photography, including landscapes, portraits, commercial, weddings, travel and street.
Optically the 24-70mm is exceptional, producing images that are pin-sharp across the frame and largely free from unwanted aberrations at all aperture settings. This is thanks to its advanced optical design that includes 6 FLD elements, 1 SLD element and 3 aspherical elements. The lens’s out of focus areas are attractive and smooth, and don’t distract from the in-focus subject. The lens is often found in the same kitbag as the 14-24mm, which is also F2.8. Together they offer an unbroken focal range from 14-70mm at a constant F2.8 aperture.
The exceptional build quality of the 24-70mm F2.8 DG DN is exactly as you’d expect from an Art-line lens, in the materials used, the overall ergonomics and the quality of craftsmanship.
The exterior barrel is made of a polycarbonate called Thermally Stable Composite (TSC). Not only is this very strong and light, but it has a similar thermal expansion rate to aluminium. This ensures that the interior aluminium parts and the exterior TSC parts behave in the same way as temperatures change.
The focus ring and zoom ring are rubberised for easier operation, and focusing is internal, meaning the lens never changes length. This makes it ideal for use on a gimbal as the centre of gravity remains fairly constant.
To reduce flare and ghosting in bright sun, and to help protect the front element from damage if dropped, the lens has a robust petal-type lens hood with lock button. A rubberised ring on the hood makes for easier removal and fitting.
The durable brass mount is surrounded by a rubber seal to help keep out dust and moisture.
Precision brass mount with seal
Protects against dust and moisture.
Made from a strong and light polycarbonate that behaves in a similar way to aluminium.
Focus Mode switch
For changing between AF and MF.
Customisable depending on camera body.
Aperture Click switch
Clicks or de-clicks the aperture ring.
A range of controls on the lens include an AF/MF switch, and a customisable AFL button (depending on camera model).
The lens also has a click/de-click switch so that the aperture ring can be adjusted smoothly rather than in hard stops, which may be useful for film-makers. There’s also a lock switch that keeps the aperture ring in either Auto or Manual. This stops the ring accidentally being knocked out of Auto to F16 during use.
A powerful stepping motor ensures fast, accurate and quiet AF and excellent AF tracking capability.
The 24-70mm boasts outstanding optical quality with excellent rendering of detail right into the corners even wide open at F2.8.
Its advanced optical design is made up of 19 elements in 15 groups, including 3 aspherical elements, 2 SLD elements and 6 FLD elements. These help to ensure razor-sharp results and eliminate chromatic aberration, flare, distortion and vignetting.
Advanced optical coatings reduce flare and ghosting when working in bright direct sunlight, creating high-contrast images with rich colours and strong blacks.
With an F2.8 aperture, the lens has a shallow depth-of-field, ideal for creating blurry backgrounds behind an in-focus subject. The bokeh is smooth and attractive, with circular out-of-focus highlights.
The fast aperture also makes the 24-70mm a useful low-light tool, ideal for weddings, events and nightscapes where it’s not possible to use a tripod.
The versatile focal range and sharp optics make the 24-70mm a highly adaptable lens that can be used for almost any type of photography. For many photographers, the SIGMA 24-70mm is their most indispensable optic and the obvious choice when travelling light or carrying kit for long periods of time.
There are two full-frame standard zooms in the Sigma line-up: the 24-70mm Art and the 28-70mm Contemporary. Both have a constant F2.8 aperture and comparable image quality, but the 24-70mm has a wider focal length fully zoomed out. This makes it more versatile, albeit significantly bigger and heavier. The Art lens also has some more advanced features including a customisable AFL button, a lock button on the hood, a zoom lock switch, and a soft case as standard.
All Sigma cameras and lenses are designed, manufactured and assembled at our sole factory at Aizu in Japan. This domestic production model is unusual in today’s industry, with most imaging companies opting to outsource to other countries to reduce costs. But SIGMA believes that keeping virtually all manufacturing, processing and assembly in Aizu is essential for creating innovative, carefully thought-out and impeccably constructed products that meet the high standards demanded by professional photographers and film-makers around the world.
Sigma chose Aizu as its main production base in the early 1970s. Situated at the base of Mount Bandai in the Fukushima Prefecture, about four hours’ drive north of Tokyo, Aizu has an abundance of very clean water from mountain streams, which is essential for grinding and polishing lenses. Sigma’s founder, Michihiro Yamaki, was also drawn to this area for its workforce, who have a reputation for their craftsmanship, work ethic and attention to detail. Mr Yamaki’s son, Kazuto Yamaki, now the owner and CEO of SIGMA Corporation, has the same unwavering commitment to keeping production in Japan.
Today Sigma’s factory is more than 50,000 square feet in size, and packed full of some of the most advanced optical manufacturing technology in existence. So when you buy a Sigma camera or lens you can be sure that virtually every single component part has been manufactured and assembled by SIGMA, in Japan, with the greatest level of care and attention. We hope you enjoy using our products.
If you want to see how a particular SIGMA lens or camera performs, why not test drive it with our SIGMA Select hire service. Available for selected SIGMA lenses, short-term loans are free of charge (including shipping), with a small fee if you want to test it for longer. Refundable deposit required. Subject to availability.
19 elements in 15 groups
Angle of view
Number of diaphragm blades
11 (rounded diaphragm)
Minimum focusing distance
Maximum magnification ratio
Dimensions (diameter x length)
ø87.8mm × 122.9mm
Corresponding AF mounts
L-Mount | Sony E
Sony E barcode
Specifications are for L-Mount
A special coating applied to the front element to help repel water and oil.
This suppresses flare and ghosting by minimising reflections within the lens, ensuring punchy, high-contrast results. All lenses in the current Sigma range feature this technology.
The lens has an image circle large enough to be used on a full-frame camera. It can also be used on cameras with a smaller ‘crop’ sensor, provided the mount is compatible.
The lens has a filter thread around the front element onto which filters and filter holders can be attached.
The mount is the part of the lens that attaches to the camera body. A coated brass mount is used for strength, and is surrounded by a rubber seal to keep out dust and moisture.
Found on the barrel of some Sigma lenses, the AFL button can be assigned to various functions to widen the range of operations available on the lens (available functions depend on the camera model).
This switch toggles between autofocus and manual focus.
The diaphragm is constructed of 11 rounded blades for a circular aperture opening and round out-of-focus highlights.