Sigma introduces two fast wide-angle lenses in its Art series. Both are rated for full-frame and equipped with L-mount or Sony E-mount. They feature a quiet stepper motor for focusing and also support autofocus with automatic eye detection. The 11-lens aperture can be optionally unclicked.
Sigma fp with the new 24mm F1.4 DG DN Art.
Sigma 24mm F1.4 DG DN | Art.
The 24mm F1.4 DG DN | Art consists of 17 lenses in 14 groups, including two FLD, one SLD and four aspherical glass elements. Imaging errors such as sagittal coma as well as unsightly effects such as ghosting and flares are to be suppressed or minimized. A super multi-layer and nano-porous coating (NPC) is said to provide high-contrast images even in backlit conditions without ghosting or flare spots.
The closest focusing distance is 25cm. A new MFL (Manual Focus Lock) switch disables the focus ring and prevents accidental adjustment of the distance setting. There is also an aperture ring lock switch and a configurable AFL button.
Both a front filter thread and a rear filter holder are available. The dust- and splash-proof lens is equipped with a solid and precise brass bayonet and weighs 520g.
Sigma 20mm F1.4 DG DN | Art
Sigma promotes its new 20mm F1.4 DG DN | Art as the ultimate lens for astrophotography. It is said to be "incredibly sharp" and, according to the manufacturer, is currently the widest-angle F1.4 AF lens for full-frame mirrorless system cameras.
The optical construction comprises 17 glass lenses in 15 groups, including two SLD elements, three aspheres, and the largest bilateral aspherical glass lens Sigma has ever installed. Imaging errors such as sagittal coma and distortion are said to be effectively suppressed.
Again, there is a front filter thread as well as a rear filter holder, a Manual Focus Lock switch, aperture ring lock switches and a configurable AFL button. There's also a special device intended for use with a lens warmer to keep the optics fogged up on a starry night.
Delivery is scheduled to begin at the end of August for €899 (24mm F1.4 DG DN | Art) and €999 (20mm F1.4 DG DN | Art).