SIGMA Camera Lens 28-45mm F1.8 DG DN Art [Leica L / zoom lens]

Product Specifications

Basic Information

Product Features

World's first* full-frame zoom lens with a maximum aperture of F1.8 and single focal length image quality

As a pioneer of large-aperture zoom lenses, the world's first full-frame zoom lens with a maximum aperture of F1.8 has been successfully commercialized. In addition to unprecedented brightness, the lens delivers image rendering performance comparable to that of a single focal length lens throughout the entire zoom range, as well as fast and accurate autofocusing.

[Main Features]
1. The world's first full-frame zoom lens with a maximum aperture of F1.8

The world's first full-frame zoom lens with a maximum aperture of F1.8 was successfully developed. In addition, the inner zoom mechanism, minimum focusing distance of 30cm across the entire zoom range, and filter size of ø82mm make it easy to handle and set up for hand-held shooting, and the lens weighs less than 1kg for convenience.

Realization of a maximum aperture of F1.8 across the entire zoom range
The world's first full-frame zoom lens with a maximum aperture of F1.8 was realized by combining Sigma's accumulated experience, the latest design technology, and the advanced production technology of the Aizu Plant, Sigma's only production site. The large aperture of F1.8 allows the photographer to enjoy the abundant amount of light and the large, beautiful bokeh effect at any angle of view, which have been the privilege of single focal length lenses for full-frame cameras.

Adoption of Inner Zoom Mechanism
An inner zoom mechanism is employed. Since the total length of the lens does not change with zoom operation, it is easy to handle when shooting hand-held, highly stable when mounted on a tripod or gimbal, and impervious to dust and water droplets.

Constant and high close-up shooting ability throughout the entire zoom range
The minimum focus distance is a constant 30cm across the entire zoom range, and the maximum magnification of 1:4 at the telephoto side provides high close-up shooting ability. The camera can be used for compositions where the subject is close to the camera without worrying about changes in minimum focus distance due to zoom operation, and for shooting in narrow spaces where the distance from the subject cannot be maintained.

High build quality condensed into a body weighing less than 1 kg
While maintaining the rigidity and durability essential for a reliable photographic tool, the sophisticated optical and mechanical design has achieved a weight of less than 1 kg and a highly versatile filter size of ø82 mm.

2. high optical performance comparable to a single focal length lens

The lens thoroughly corrects each aberration throughout the entire zoom range, and has high optical performance comparable to that of a single focal length lens. The lens is designed to minimize flare and ghosting through the use of nano-porous coating, etc., enabling clear images even in backlit environments. Focus breathing is also suppressed, so the one-of-a-kind expressiveness offered by the F1.8 zoom lens can be fully utilized in movie shooting.

High quality expression brought about by high optical performance
Aberrations are well corrected by effectively arranging five SLD glass elements and three aspherical lens elements. Axial chromatic aberration, which is particularly noticeable with large-aperture lenses, is thoroughly suppressed.

Design to suppress focus breathing
The lens is designed to suppress focus breathing. The change in angle of view due to focus shift is minimized throughout the entire zoom range, enabling natural expression of focus shift in movie shooting.

Design to minimize flare and ghosting
To prevent flare and ghosting, which reduce image quality, we have taken measures against all conditions of incident light based on the most advanced simulation technology. In addition, the use of nano-porous coating and super multi-layer coating suppresses flare and ghosting to the utmost limit. High backlight resistance enables clear and sharp images under any lighting conditions.

3. High-Speed AF and Various Functions for Comfortable Shooting

In addition to the high-precision, high-speed AF using a high-response linear actuator (HLA), the camera is equipped with a full range of functions, including a dustproof, drip-proof construction, weather resistance with a water and stain repellent coating, an aperture ring, and an AFL button. The easy-to-operate focus ring allows you to enjoy delicate and comfortable MF shooting.

Adoption of Linear Motor HLA
A linear motor HLA (High-response Linear Actuator) is used as the AF actuator.

Comfortable manual focusing
The bi-wire driven focus ring with optimum torque setting and high resolution enables fine focus operation, and the shallow depth of field of F1.8 allows you to enjoy expression using the focus feed in movies or manual focusing with care. The linear focus rotation angle can be set in the range of 90° to 720° for L-mount lenses (*Compatible cameras only).

Aperture Ring
Equipped with an aperture ring. An aperture ring click switch and aperture ring lock switch are also provided.

Equipped with two AFL buttons
Two AFL buttons are provided to which any desired function can be assigned.

Dustproof and drip-proof construction* with water and stain-repellent coating

Includes a locking flower-shaped hood