With a magnification ratio of 1:1, this true macro lens for mirrorless cameras is designed for focusing very close to a subject to capture it in a very high level of detail. It’s perfect for photographing natural-world objects such as insects and plants, but it can also be used for non-macro subjects such as portraits and landscapes.
The lens delivers exceptional image quality, with razor-sharp results across the whole frame at all apertures. The maximum aperture of F2.8 ensures fast shutter speeds in low-light conditions as well as a shallow depth-of-field for blurry backgrounds. A number of professional-level features are built in, including a manual aperture ring with de-click and lock switch, an AFL button, a focus limiter and a dust- and splash-resistant structure.
The 105mm F2.8 MACRO EX DG OS HSM has a strong but light polycarbonate exterior barrel that is designed to withstand the rigours of daily use. Weighing only 725g, the lens can be used comfortably hand-held for long periods of time, or carried around all day in a kit bag.
The focus ring is rubberised for easier operation, and focusing is internal, meaning the lens never changes length. The action on the focus ring is smooth and accurate, and a focus distance window allows photographers to see the lens’ focus distance without looking through the viewfinder.
To reduce flare and ghosting in bright sun, and to help protect the front element from damage if dropped, the lens has a robust polycarbonate lens hood.
The durable brass mount is surrounded by a rubber seal to help keep out dust and moisture.
A range of controls on the lens include an AF/MF switch and a Focus Limiter switch, which allows photographers to reduce the focusing range of the lens so that it doesn’t attempt to focus on prominent foreground of background objects rather than the subject. This means faster AF, and more accurate focus acquisition.
A built-in Optical Stabilizer function provides up to a four stop advantage, allowing users to shoot hand-held in lower light conditions without needing to increase the ISO. This is useful on a macro lens as it may be desirable to work at narrow apertures to increase depth-of-field, cutting out much of the available light.
The lens is fitted with Sigma’s HSM focus motor for fast, accurate and quiet AF.
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.
The 105mm Macro 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 16 elements in 11 groups, including 2 SLD 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.
A true macro lens allows photographers to capture small objects in extremes detail. The 1:1 ratio means the impression of the object on the camera’s sensor is the same size as it is in real life at the minimum focusing distance.
SIGMA has two full-frame macro lenses for DSLRs, both of which offer a 1:1 magnification ratio. The 105mm F2.8 offers image stabilisation, an HSM focus motor and a focus limiter. The 70mm F2.8, which is only available for Canon DSLRs, sits in the Art range and has the newer Global Vision design. It is optically extremely sharp, and its shorter length means its working distance is slightly closer to the subject.
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.
16 elements in 11 groups
Angle of view
Number of diaphragm blades
9 (rounded diaphragm)
Minimum focusing distance
Maximum magnification ratio
Dimensions (diameter x length)
ø78.3mm × 126.4mm
Corresponding AF mounts
Canon EF | Nikon F
Canon EF barcode
Nikon F Barcode
Specifications are for EF-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.
Sigma’s Optical Stabilizer function uses sensors inside the lens to detect motion, then moves specific lens elements in order to effectively minimise blur. This helps ensure shake-free images at slower shutter speeds.
This describes the degree to which a lens can magnify an in-focus subject. The ratio shows the relationship between the size of the projection of a subject on the camera’s sensor (the left number) and its actual size in reality (the right number).
Internal focus or an inner focus system means the lens configuration uses movable internal lens elements that adjust focus without changing the length of the lens barrel. This helps keep the centre of gravity of the lens more constant when changing focus.
Sigma’s Hypersonic Motor (HSM) uses ultrasonic waves to drive the autofocus mechanism. It is extremely quiet, fast and accurate, so is well suited to a wide range of photo and video applications.
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.
This switch, found on some Sigma telephoto lenses, allows users to limit the focusing range to either near distance or far distance. This helps speed up AF, and also ensures the camera won’t attempt to focus on an unwanted area of the frame.
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.
This switch toggles between autofocus and manual focus.
The diaphragm is constructed of nine rounded blades for a circular aperture opening and round out-of-focus highlights.