DESCRIPTION
Canon RF 10-20mm f/4L IS STM Overview
Dynamic Ultra-Wide Versatility
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.
Advanced L-Series Optics
- Rectilinear optical design featuring one Super UD element, three standard UD elements, and three aspherical elements to reduce chromatic aberration and distortion throughout the zoom range, while also providing consistent edge-to-edge sharpness and illumination.
- ASC (Air Sphere Coating) and SWC (Subwavelength Structure Coating) to reduce flare, ghosting, and other aberrations for increased contrast and color accuracy.
- FLC fluorine coating applied to the lens's surface effectively repels dust, water droplets, grease, and dirt, ensuring easy removal even when they adhere to the lens surface. This coating also endures a high frequency of lens surface wiping, and its anti-reflective effect contributes to the capture of clear images.
Fast Autofocus and Image Stabilization
- Fast and precise autofocus system delivering quick, nearly-silent autofocus performance with full-time manual focus override.
- Quiet high-speed STM leadscrew-type focus drive system that is especially beneficial to video users.
- An Optical Image Stabilizer minimizes the appearance of camera shake by five stops to better enable working in low-light conditions and with slower shutter speeds. Additionally, when paired with an EOS R-series camera that has In-Body Image Stabilization (IBIS), the Coordinated IS system allows for up to six stops of camera shake.
- Minimum focusing distance of just under 10" at all focal lengths for unique ultra-wide closeups.
Handling and Design
- Configurable Control Ring can be used to adjust a variety of exposure settings, including aperture, ISO, and exposure compensation.
- Nine-blade diaphragm to create a smooth and pleasing bokeh quality.
- Accepts rear insert-type gelatin filters, which are cut-to-size and inserted behind the rear lens element.
Built-in petal-shaped lens hood.
- L-series construction sealed against dust and moisture for working in inclement environmental conditions.
SPECIFICATIONS
Lens
- Focal Length
- 10-20mm
- Maximum and Minimum Aperture
- f/4 - f/22
- Lens Mount Type
- Canon RF Mount
- Compatible Cameras
- Canon EOS R-series, full-frame and APS-C (focal length equivalent to approx. 16-32mm when used on an APS-C camera)
- Minimum Focusing Distance
- 9.8" (0.25m)
- Maximum Magnification
- 0.12x (at 20mm)
- Field of View, at Minimum Focus Distance
- Approx. 20.5 x 13.7" (520 x 347mm) at 10mm; 11.2 x 7.4" (284 x 189mm) at 20mm
- Angle of View (Diagonal)
- Approx. 130 Degree 25'- 94 Degree
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 (H x V)
- 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
- 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
Physical
- Dimensions (Diameter x L)
- Maximum Outer: 3.3 x 4.4" (83.7 x 112mm) (Approx.)
- Weight
- 1.3 lbs (570g) (Approx.)
KEY FEATURES
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
BOX CONTENTS
- Canon RF 10-20mm f/4 L IS STM Lens (Canon RF)
- Canon Lens Cap for RF 10-20mm f/4 L IS STM
- Canon Lens Dust Cap RF
- Canon LP1219 Soft Lens Case
