Pairing a favored short-telephoto focal length with a notably bright maximum aperture, the Canon RF 85mm f/1.2 L USM is known for its advanced optical design that provides well-corrected images. The f/1.2 aperture thrives in challenging lighting and benefits shallow depth of field and selective focus use. The optical configuration includes a Blue Spectrum Refractive Optics element to nearly eliminate chromatic aberrations and color fringing for clear and accurate color. Additionally, there is an ultra-low dispersion element and one aspherical element to further manage various aberrations and distortion, ensuring great sharpness and resolution. Each element features an Air Sphere Coating to reduce flare and ghosting, maintaining high contrast and color fidelity in bright and backlit situations. Supporting the lens's capabilities is a sophisticated ring-type Ultrasonic Motor, delivering fast, nearly silent autofocus and allowing full-time manual focus adjustments. A distinctive Control Ring is part of the lens design, allowing intuitive control over exposure settings directly from the lens. Designed for full-frame Canon RF-mount mirrorless digital cameras, this portrait-length prime lens offers an exceptionally bright f/1.2 maximum aperture, providing extensive depth of field control for selective focus and improving low-light performance. The Blue Spectrum Refractive Optics element almost entirely removes color fringing and chromatic aberrations by refracting shorter wavelengths of blue light in the visible spectrum. One aspherical element and one UD element are included to control aberrations and distortions, enhancing image clarity and sharpness. The Air Sphere Coating (ASC) on lens elements helps reduce backlit flare and ghosting, maintaining light transmission and high contrast even in strong lighting environments. The ring-type Ultrasonic Motor (USM), along with optimized focusing algorithms, a high-speed CPU, and an internal focusing design, delivers fast, precise, and quiet autofocus performance, along with the ability to manually override focus at any time. The customizable Control Ring can adjust various exposure settings such as aperture, ISO, and exposure compensation. As part of the renowned L-series, this lens boasts a weather-resistant construction, guarding against dust and moisture, making it suitable for challenging conditions. The rounded 9-blade diaphragm contributes to an appealing bokeh quality.