The pioneer of ultra-wide angle lenses, SIGMA, has developed and launched many outstanding products in this category over the past decades. SIGMA now introduces an ultra-wide angle zoom lens that is perfect for the era of high-resolution digital cameras. The SIGMA 12-24mm F4 DG HSM | Art delivers optimal image quality, from the center to the edge, and offers significantly reduced distortion and a particularly low close-up limit. To achieve this uncompromising quality, SIGMA used its profound knowledge of lens design and its diverse, highly developed technologies. State-of-the-art materials such as low-dispersion glass play a crucial role, with the extremely large-diameter aspherical lens also thanks to SIGMA's advanced lens manufacturing methods.
Photographers who use ultra-wide angle lenses attach particular importance to excellent image quality, from the center of the image to the edges, without distortion. Such an achievement is especially valuable for architectural photography. The new SIGMA 12-24mm F4 DG HSM | Art draws on SIGMA's accumulated knowledge and skills in the manufacture and processing of aspherical lenses and includes several aspherical lenses made of precision-molded glass. In addition, the lens features FLD ("F" Low Dispersion) lens elements with performance equivalent to fluorite glass and optimized power distribution. The combination of these properties helps to minimize distortion, transverse chromatic aberration and coma. As a result, the image quality is outstanding over the entire image.
The SIGMA 12-24mm F4 DG HSM | Art has an aspherical lens made of glass with –mm - with this diameter it is the largest such element of this lens class. This lens minimizes highly effective distortion, spherical aberration and coma.
With F4 over the entire focal length range, the lens is a whole step brighter than conventional lenses. Photographers can now use a faster shutter speed to capture sharp images of sheets moving in the wind and other fast-moving subjects, for example. This lens is also extremely easy to use thanks to its constant aperture throughout the zoom process.
The newly designed HSM (Hyper-Sonic motor) is larger and its speed 1.3 times that of its predecessor. Even at low speeds, its performance is exceptionally stable.
A rubber seal is incorporated in the lens mount to protect the mount from dust and water drops. The front and rear lenses have a water- and oil-repellent coating. This is especially useful when shooting in drizzle, at sea with its spray and in a variety of other situations.…more