Voigtlander RF 50mm f/1.0 Nokton Aspherical GA for CANON RF. Modern High Performance Super Fast NOKTON optimized for Canon EOS R Sensors. Chipped for lens to body communication, EXIF, in body stabilization, focus magnification, focus peaking, and focus guide are supported most bodies. Front Aspherical Surface GA (Grinding Aspherical), Floating Lens Elements for optimal optical close up performance, 12 Aperture Blades for Beautiful Bokeh, Traditional lens aperture ring controls aperture, 1/3 click stop aperture or clickless aperture, Lens Hood Included, Optional Selective Aperture for Clickless Video Operation. Maximum Diameter x Length: Φ79.3×64mm, Weight: 22.9oz or 650g, Lens Hood Included. 9 lens elements in 7 optical groups, Close focus .45 meter or 17.7 inches, 67mm filter size.