Fast maximum aperture The Canon RF 85 mm f/1.2L USM Standard Prime Lens has a large maximum aperture of f/1.2, enabling you to use fast shutter speeds in low light situations. You can enjoy fine control over focusing, allowing for extremely shallow depth of field to create unique effects. With its rounded aperture diaphragm, you can sharpen foreground images to make them stand out against smooth blurred backgrounds. This makes the lens ideal for portraiture photography, bringing the subject into sharp focus. Ultrasonic focusing You can autofocus quickly & in near silence as a result of the ring-type ultrasonic motor. The point of focus is reached accurately by holding torque, while you can remain in complete control thanks to a full-time manual override. With this, you can adjust the focus without having to leave AF mode. Colour is balanced accurately thanks to Blue Spectrum Refractive (BR) optics, while a ground aspheric lens elements stops spherical aberrations caused by a large maximum aperture.