Exclusive Next Generation Tokina ELR coating:The ne.wly developed Tokina ELR (Extremely Low Reflection) Coating was engineered to specifically target the visible light spectrum as it enters and passes through the lens. This drastically reduces the reflection ratio when compared to traditional Tokina lens coatings. This results in dramatically reduced ghosting and flare when shooting in challenging lighting conditions especially when strong light sources are within the image.Dust & Weather Resistant Sealing:The lens employs the latest advancements in dust-resistance and weather sealing targeting 8 areas in the lens construction most vulnerable to dust and water penetration. When coupled with a dust and weather sealed DSLR camera, the lens will not let you down even in adverse weather conditions.* The sealed construction aims to enhance the dust and weather resistant capabilities of the product but does not guarantee that the lens is completely dust repellent and waterproof.Focus ring rotation:The directional rotation of the focus ring matches the proprietary direction of Nikon and Canon lenses.Silent and precise AF drive module:To ensure fast and accurate AF, the opera 50mm F1.4 FF incorporates a high-speed, ring-shaped ultrasonic motor for near-silent operation. This provides photographers and filmmakers a valuable tool when speed and quiet are critical features to capturing their vision.About Opera Series:With the debut of 50mm F1.4 FF Tokina is launching a ne.w series of next generation, premium full-frame lenses for high-end DSLR cameras called 'opera' series. The ne.w series is designed to perfectly match recent high-resolution full-frame DSLR cameras that demand the highest quality optical designs. Building on the award winning heritage of Tokina's AT-X line of lenses, the ne.w opera series will of/er an ever-expanding, premium line of Full-frame lenses that meet the growing demands of high-performance DSLR cameras.In modern society the word 'opera' is commonly used to indicate stage art works that combine drama, music and dance. In Italian it means work or work of art. As an omitted art genre definition opera comes from 'opera musicale' that means a piece of music work. In Latin opera comes 'opus' that is still used in contemporary language meaning 'great literary, artistic or intellectual work' (e.g. 'magnum opus', 'opera magna'). We chose the name opera for our ne.w premium full-frame DSLR lens series with the idea that it will help the photographer in creating real 'works of art'.About Tokina Opera 50mm F1.4 FF | Standard Prime Lens:The 50mm F1.4 FF is the debut premium lens in Tokina's ne.w opera series for high-performance full-frame DSLR cameras. The lens incorporates Tokina's latest advancements in optical engineering and electronic design to meet the demands of today's DSLR technology. With advanced features like ring-shaped ultrasonic motors for fast and quiet operation, Tokina's ne.w ELR lens coating technology, and advanced weather sealing technology, the ne.w 50mm F1.4 FF opera lens will be a go-to lens in many camera bags.Superior optical performance and Natural Bokeh:In order to effectively suppress chromatic aberrations and deliver sharp edge-to-edge images at all apertures, the opera 50mm F1.4 FF optical construction includes 3 lens elements moulded from SD (Super-low Dispersion) glass and one aspherical glass element in the rear-focus lens group.