A consistently fast lens for full-frame cameras across the entire focal length range.
Many ambitious full-frame photographers prefer a zoom lens in certain situations, but do not want to compromise on image quality.
That's why we've developed a standard zoom Lens that meets these needs and delivers consistently high image quality from wide-angle to telephoto. The new 24-105mm F4 DG OS HSM | Art thus fits perfectly into the group of outstanding optics in the Art product line.
The consistently high speed and zoom ratio have been developed with the help of many simulations and optimally combined so that this Lens fits the specifications of a 35mm full-frame sensor, setting a new standard for professional cameras. Ideal for portraits, landscape photography and general photography.
Due to the minimization of aberrations by using the latest technologies and our know-how from many years of lens development, the 24-105mm F4 DG OS HSM | Art achieves amazing imaging performance with a very high resolution, even at the edges of the image. While the focused subject is rendered with high resolution, the Lens also provides smooth and natural bokeh. Both high-resolution rendering without chromatic aberration and natural bokeh are possible with an open aperture.
Ideally, a fast lens already exhibits high imaging performance over the entire image area at open aperture. Sagittal coma, for example, in which the rays of a point light source do not meet at one point but create a tail, is a typical reflex that occurs primarily with wide-angle lenses. The 24-105mm F4 DG OS HSM | Art has an optimized performance design by positioning aspherical lens elements on the back and adjusting the light incidence angle, ensuring high reproduction performance even at open aperture. Reduced distortion of point light sources at the edges of the image makes it perfect for astrophotography and available light.
Exceptional image quality
To achieve high imaging performance, chromatic aberration correction is essential. And so minimizing image aberration was a focus from the development stage of the Lens. The Lens now incorporates FLD ("F" Low Dispersion) glass and SLD (Special Low Dispersion) glass elements, minimizing chromatic aberration that is mainly visible at the periphery, when the image is magnified. Moreover, the overall performance design ensures correction of longitudinal chromatic aberration from the outset, which is difficult to correct later in image processing. This Lens achieves high image quality across the entire focus range, ensuring sharp, high-contrast images.
Minimizing distortion was an important issue even during the development of this Lens. With the 24-105mm F4 DG OS HSM | Art, the angle of incidence of light is adjusted directly with the first lens, and each aspherical glass element has been positioned to optimize performance at each position. This has helped minimize distortion across the entire field of view.
Lenses with large diameters naturally experience a drop in brightness at the edges - compared to the center of the image. The improvement in efficiency at large apertures and the minimization of vignetting ensure very uniform brightness. This uniform illumination already from open aperture is the reason for high-contrast images both in indoor photography and, for example, in astrophotography or when photographing the blue sky.
Reflection and Ghost Eliminating Design
From the very beginning of the lens design process, we studied susceptibility to reflections and ghosting to achieve an optical design that is resistant to even strong backlighting. Super Multi-Layer Coating (SML) reduces flare and ghosting and delivers sharp, high-contrast images, even when backlit. Customization and flexible adjustment of the Lens for more comfort or for a special use are easily possible thanks to the SIGMA USB Dock and dedicated software.
Design concept
The new product lines include a rubber coating at the base of the supplied lens hood. The lens caps and AF/MF switches have also been redesigned for improved usability. The internal parts, metal parts and the new material called "TSC" (Thermally Stable Composite), which combines well with metals, are arranged so that the products can show optimal accuracy. The Lens barrel is engraved with the year of release, so you can tell right away when the Lens was released.
Round aperture
The near-round aperture consists of 9 aperture blades and provides a very pleasing bokeh outside the plane of focus of the image.
Fast focusing
The Hyper Sonic Motor (HSM) enables quiet and very fast AF. The improvement of the AF algorithm makes AF much smoother. The Lens also incorporates a new Manual Override mechanism that switches to manual focus by turning the focus ring during any type of AF operation. This allows the photographer to adjust the focus quickly and easily. Using the optional SIGMA USB dock, conventional manual override focusing can also be adjusted.
Brass Bayonet
The Lens is equipped with a solid and precise brass bayonet. The special surface treatment to reinforce strength enables long-term use.
