SIGMA 28-45mm F1.8 DG DN | Art full-frame zoom lens. a fast, portable and versatile large aperture zoom lens with the sharpness and and clarity of a prime lens. Thanks to its f1,8 aperture you can produce unprecedented brightness across the zoom range, plus its advance optical performance and quick AF allow for extensive creative options unique to the history of zoom lenses. This lens can generate incredible versatility to still photographers and to full-frame filmmakers.
Features:
The world's first full-frame, F1.8 maximum aperture zoom lens
Practical & stable inner zoom
Consistent close focus
Premium build at lighter weight (less than 1 Kg)
18 elements in 15 groups (5 SLD, 3 aspherical elements)
High Speed AF
HLA (High-response Linear Actuator)
Compatible with Lens Aberration Correction^
Supports DMF and AF+MF
Compatible with AF assist (for Sony E-mount only)
Nano Porous Coating
Super Multi-Layer Coating
Water-and Oil-Repellent Coating (front element)
Aperture ring with click switch & ring lock switch