Samyang's popular manual-focus APS-C ultra-wide — 18mm equivalent at f/2 for astrophotography and landscapes.
The Samyang 12mm f/2 NCS CS is a manual-focus ultra-wide-angle prime for APS-C mirrorless cameras, providing 18mm equivalent on Fujifilm X-mount. NCS (Nano Coating System) reduces flare and ghosting. It became hugely popular for astrophotography due to its fast f/2 aperture and sharp optics.
Optically very good for the price — sharp across the frame from f/2.8 with impressive centre performance even wide open at f/2. The fast aperture and wide angle make it one of the most popular astrophotography lenses for crop-sensor mirrorless cameras. Minimal coma in corners.
Fujifilm X mount (also available for Sony E, MFT, Canon M). No filter thread — front element is curved. Manual focus only — no electronic contacts on most versions. Weighs approximately 260g. Minimum focus distance 20cm. All-metal construction with smooth focus ring.
Very common used and excellent value. Also sold as Rokinon/Bower branded. The lack of AF and electronic contacts means no EXIF data — note exposure settings manually. Check for smooth focus ring. The go-to budget astrophotography ultra-wide for crop-sensor mirrorless.