Leica M mount Manual focus Rectilinear optics Ultra low distortion f/4 maximum aperture The World's widest full frame lens* Ultra compact, just 228g Support Rangefinder coupling The Leica M mount is ideal for the Laowa 14mm f/4 FF RL Zero-D. Ultra wide-angle lens with near-zero distortion (Zero-D) and an angle of view of 114 °. Screw-in 52mm filter thread and ultra-wide perspective enable photographers to create one-of-kind elements of inspiring photographs. Extremely small and lightweight with a mere 228g and a mere 58mm x 59mm diminutive dimension. Bring the Zero Responsibility anywhere. For a full frame mirrorless camera, this is probably the most lightweight "Zero D" lens. Good for several and different opportunities for photography and film, such as landscapes, interiors and astrophotography. Due to the 5 bladed aperture, the latter is assisted by the excellent 10-point Sunstars.