Perfect Portrait Prime\r\nPairing a medium-telephoto focal length with an extremely bright maximum aperture, the Canon RF 135mm f/1.8 L IS USM offers an engaging mixture of high sharpness and shallow depth of field, making it an ideal choice for portrait subjects. Benefitting this desirable combination is an advanced L-series optical design, robust and weather-sealed construction, and fast AF along with dependable image stabilization for intuitive use.\r\nL Series Optics\r\nImpressively bright f/1.8 maximum aperture affords extensive control over depth of field for selective focus applications and also benefits working in low-light situations.\r\nThree ultra-low dispersion elements control a variety of aberrations in order to achieve high sharpness, clarity, and accurate color rendering.\r\nBoth Air Sphere and Super Spectra Coatings improve image quality by maintaining high contrast and color accuracy while reducing lens flare and ghosting when working in strong lighting conditions.\r\nRounded nine-blade diaphragm contributes to a pleasing bokeh quality.\r\nNano USM Autofocus and Image Stabilization\r\nNano USM delivers fast, accurate, and near silent autofocus performance to benefit both photo and video applications.\r\nCustomizable Lens Function buttons on the barrel permit intuitive tactile control and rapid access to shooting settings.\r\nBenefitting handheld and monopod-based shooting, Optical Image Stabilization compensates for 5.5 stops of camera shake, or up to 8 stops if paired with in-body image stabilization, for sharper imagery.\r\nRobust Design and Intuitive Handling\r\nWeather-sealed design for reliable use in inclement conditions.\r\nFluorine coating on front element helps repel moisture, dust, and fingerprints and is also easier to clean.\r\nConfigurable Control Ring can be used to adjust a variety of exposure settings, including aperture, ISO, and exposure compensation.