The Canon K35/FD‑X 10 mm T3.1, rehoused by Zero Optik, is a vintage ultra‑wide lens that blends classic soul with modern cinematic usability. Based on Canon FD 14 mm optics—the same glass used in the original K35 set from the 1970s—Zero Optik has re‑glassed the internals and fully redesigned the housing. The result is an impressive full‑frame, rectilinear image with a true 10 mm angle of view, without the fisheye distortion typical of ultra‑wide lenses.

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Featuring a maximum aperture of T3.1, the lens delivers strong low‑light performance while maintaining a distinctive vintage look—with warm color rendition and generous flares—making it perfect for productions seeking a unique visual aesthetic.

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Its modern design includes a smooth 330° focus rotation, a 16‑blade circular iris, and is available in PL, LPL, or EF mounts, allowing seamless integration into rigs, drones, gimbals, or run‑and‑gun setups.

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Despite its extreme angle, the lens is surprisingly compact—weighing just 1.36 kg (3 lb) with a 136 mm front diameter. It offers a minimum focus distance of 9.5″ (≈24 cm), enabling dramatic "face‑to‑glass" shots and expressive close‑ups. Optically, it delivers crisp center sharpness with gentle edge fall‑off and controlled barrel distortion, preserving its vintage character while offering practical versatility.