A state-of-the-art ultra-wide zoom lens, the Canon RF 10-20mm f/4 L IS STM delivers professional quality results for all your landscape, nature, architecture, and interior image-making needs. Optimized for both photo and video applications, this versatile, full-frame, L-series lens provides visual drama to your imagery for outstanding results that will be remembered for a lifetime. Full-Frame | f/4 to f/22 Fast Ultra-Wide Zoom High-Speed STM Autofocus System Optical Image Stabilizer Programable Control Ring One Super UD and Three UD Elements Air Sphere and SWC Coatings Weather-Sealed Construction