The ROKINON Special Performance SP 10mm f/3.5 is the widest full frame rectilinear prime lens currently available for Canon EF mount cameras. This world class prime lens yields extraordinary image quality for 50 megapixel photos and 8K (8192 x 4320) video productions. It also provides equally amazing ultra-wide images with Canon APS-C  sensor models where it delivers a 35mm effective focal length of 16mm. Focusing to 10.2", it's great for dramatic close-up ultra-wide shots.Its 18 elements in 11 groups design makes use of one High Refractive Index and three Aspherical elements to control spherical aberrations and for improved sharpness throughout the aperture range. Three Extra-low Dispersion elements reduce color fringing and chromatic aberrations. Ultra Multi-Coating is utilized on all lens surfaces to minimize ghosting while also increasing contrast and color accuracy.Its features include an ergonomically shaped aluminum alloy housing with integrated hood, a precise and silky-smooth manual focus control, full use of Canon’s exposure control modes, and EXIF info is registered. The ROKINON SP 10mm F3.5 for Canon is ideal for product, landscape, architecture and real estate photographers that demand excellent performance and an ultra-wide view. User Manual Download