World's widest f/1.8 prime — Sigma's Art-line 14mm for astrophotography with weather sealing and rear gel filter.
The Sigma 14mm f/1.8 DG HSM Art (2017) is the world's widest f/1.8 prime — a groundbreaking lens for astrophotography. The fast aperture at 14mm ultra-wide collects significantly more light than f/2.8 alternatives, enabling shorter exposures for star photography.
Outstanding sharpness across the frame. Art-line optics with minimal coma — critical for astro where point-source stars must remain points. HSM fast AF. Weather sealed. FLD and SLD glass elements. Rear gel filter holder.
Nikon F mount. Bulbous front — no front filter thread. Rear gel filter holder. 1120g — heavy for a prime. 77mm (rear filter for gels). Weather sealed. Also available in Canon EF and Sony A mounts.
Available used. Check for decentring at the corners — critical for astro. Test at f/1.8 against a star field. The weight (1120g) is substantial but justified by the unique optics. Nothing else matches this speed at this width.