World's widest full-frame rectilinear lens at 9mm — no fisheye distortion — with near-zero distortion design.
The Laowa 9mm f/5.6 FF RL (Full Frame, Rectilinear Lens) is an ultra-wide manual-focus prime for full-frame mirrorless bodies, providing a 9mm rectilinear perspective — approximately 113° diagonal field of view — without fisheye-style barrel distortion. At 350g and no front filter thread it is lightweight for a full-frame ultra-wide prime. A 100mm front lens holder is used for compatible square filter systems. No autofocus — fully manual. Available in Sony FE, Canon RF, Nikon Z, and L-mount versions.
The optical design uses 14 elements in 10 groups. Five aperture blades. No front filter thread — a 100mm filter holder system is required for landscape ND and polariser use. At 350g the lens is lightweight for a 9mm full-frame prime. Minimum focus distance of 0.12m (12cm). No autofocus — fully manual focus. f/5.6 maximum aperture. FF RL (Full Frame, Rectilinear Lens) designation confirms full-frame coverage and straight-line distortion correction.
The 9mm rectilinear perspective on full-frame covers architectural interiors, landscape panoramas, and extreme environmental contexts where fisheye distortion is undesirable. At 9mm with rectilinear correction, the field of view is at the practical limit of non-fisheye wide-angle — perspective distortion at the frame edges is characteristic of the focal length rather than lens design error. Manual focus at 9mm is practical via hyperfocal zone focusing: at f/8 and beyond, depth of field extends from approximately 1m to infinity.
On the used market the Laowa 9mm f/5.6 FF RL is a niche purchase for architecture and landscape photographers who need 9mm rectilinear coverage. Condition checks: front optical element for marks — no filter thread means no front protection — focus ring smoothness, and confirm the mount version. Canon RF, Sony FE, Nikon Z, and L-mount versions are available. Compatible with full-frame and APS-C bodies in the specified mount.