Lens
Focal Length 10-20mm
Maximum and Minimum Aperture f/4 - f/22
Lens Mount Type RF Mount
Compatible Cameras
Canon EOS R-series, full-frame and APS-C (focal length equivelant to
approx 16-32mm when used on an APS-C camera)
Minimum Focusing Distance 0.25m (9.8 in.)
Maximum Magnification 0.12x (at 20mm)
Field of View, at Minimum Focus Distance Approx. 520 × 347mm (20.5 x 13.7 in.) at 10mm; 284 x 189 (11.2 x 7.4 in.) at 20mm
Angle of View (Diagonal) Approx. 130° 25’– 94°
Optical Design
Lens Construction: 16 elements in 12 groups
Special Elements: 1 super UD lens, 3 UD lenses and 3 aspheric lenses
Lens Coating: Canon SSC (Super Spectra Coating), SWC (Subwavelength structure coating),
ASC (Air Sphere Coating), Fluorine coating.
Filter Size Diameter None (inserted in gelatin filter holder at the rear of the lens)
Aperture Blades 9
Image Stabilization: 5.0 stops correction with In-lens Optical Image Stabilization (6.0 stops correction
with EOS R series in-body coordinated Image stabilization)
Focusing
Focusing Drive System Canon STM (Leadscrew type STM)
Full-time Manual Focusing
Yes
(Supports both ONE SHOT AF and SERVO AF with compatible EOS R-series
cameras)
Dual Pixel CMOS AF Coverage
(Horizontal x Vertical)
• EOS R — Approx. 88% x 100%
• EOS R5 — Approx. 90% x 100% (Approx. 100% x 100% when using face and
tracking-priority)
• EOS R7/R10 — Approx. 90% x 100% (approx. 100% x 100% when subject is
detected, or with Whole Area AF active)
Exterior Design
Control Ring
Yes, with click stops
(click stops can be removed by a Canon service facility, for a fee)
Manual Focus Ring
Electronic ring system
• Full-time Manual focus possible
• No physical limit to ring rotational angle
AF/MF Switch Yes; AF/ MF
MF/Control Ring Switch No
RF10-20mm F4 L IS STM
Distance Scale
None (Electronic distance scale possible in viewfinder or LCD monitor, with compatible EOS R-series cameras)
Distance Limiter Switch None
Dust / Weather Resistant Construction Yes
Dimensions, Weight
Maximum Outer Diameter x Length Approx. ø3.3 in. (ø83.7mm) x 4.4 in. (112mm)
Weight Approx. 20.1 oz. / 1.3 lbs. / 570g
Accessories
Lens hood built into lens body
Lens Cap (Front) Canon Lens Cap 10-20, Bundled
Dust Cap Canon Lens Dust Cap RF, Bundled
Lens Case Canon Lens Case LP1219, Bundled
Extension Tubes None: No Canon RF mount extension tubes
Close-up Lenses 250D / 500D Not compatible
Canon RF Extender 1.4x/2x Not compatible
Canon Gelatin Filter Holder III/IV Not compatible —gelatin filter holder on the rear of the lens.