Canon RF Mount. The Canon RF 10-20mm f/4 L IS STM belongs to Canon’s line of RF-mount lenses. It’s compatible with Canon RF-mount cameras.

Versatile Ultra-Wide Zoom. This lens’s ultra-wide zoom length makes it great for a range of applications, including landscape, nature, architectural, and interior photography. Its nine-blade diaphragm gives your shots a pleasing bokeh quality. Its constant f/4 maximum aperture range isn’t useful for low-light shooting, so you’ll probably want to stick with outdoor lighting conditions for best results.

Advanced L-Series Optical Design. The 10-20mm’s twelve-group/sixteen-element rectilinear optical design includes one Super Ultra-Low Dispersion elements, three standard Low-Dispersion elements, and three aspherical elements, which combine to provide superlative edge-to-edge sharpness throughout the zoom range while minimizing chromatic aberration and distortion. Air Sphere and Subwavelength Coatings on the lens elements promote contrast and color accuracy while reducing flare and ghosting.

Stepping Autofocus Motor. This lens uses a ring-type Stepping Motor to provide fast, accurate, and nearly silent autofocus performance for both still and video shooters. You also get full-time manual-focus override for precision adjustments. The minimum focusing is just under ten inches at all focal lengths, so you can get interesting ultra-wide close-ups.

Optical Image Stabilization. The RF 10-20mm f/4’s built-in image stabilizer compensates for five stops of camera shake, so that you can shoot in lower light at slower shutter speeds without worry. If you pair it with an EOS R-series camera that has In-Body Image Stabilization, you get up to six stops of camera shake.

Configurable Control Ring. This RF-mount lens features an integrated, configurable control ring that you can use to adjust a range of exposure settings, including ISO, aperture, and exposure compensation.

High-Quality Build. This lens boasts a weather-resistant build that protects against the elements so you can use it in adverse conditions. It accepts rear insert-type gelatin filters and includes a built-in petal-shaped hood. An FLC fluorine coating on the front element repels dust, water, grease, and other debris, making the lens easy to clean.