About this item: 
Compact, Lightweight Fixed 50 millimeter Focal Length Lens. 
Large F, 1.8 Aperture for Low-Light Photography and Creative Background Blur 
A Stepping Motor (Gear-Type STM) Provides Smooth and Quiet Continuous AF During Video Recording, As Well As When Shooting Photos 
Control Ring for Direct Setting Changes 
Optimized Lens Placement and Coatings Help Deliver Outstanding Color Balance, While Minimizing Ghosting and Flare 
Lens Compatible with the Mirrorless EOS R System (EOS R100, EOS R50, EOS R10, EOS R7, EOS RP, EOS R8, EOS R, EOS R6, EOS R6 Mark II, EOS R5, EOS R3, EOS R5 C)