Pentax K mount. This ultra-wide angle lens was designed for use on full-frame Pentax K-mount cameras. You can also use it on APS-C cameras, where it gives you a 18mm-equivalent focal length.

High-Quality Optics. The Venus Optics Laowa 12mm f/2.8 Zero-D’s rectilinear optical design keeps distortion at bay, making this lens perfect for architectural and landscape photography. Its two aspherical elements and three extra-low dispersion elements help to eliminate chromatic aberrations and color fringing while keeping images sharp. Its f/2.8 aperture makes it great for low-light shooting, while the Frog Eye coating keeps the front element clear of dust and moisture, allowing you to work in inclement conditions.

Fully Manual Lens. The 12mm f/2.8 is a fully manual lens. Its floating optical system maintains a high level of performance throughout its focal range of 7.09 in. to infinity.