Canon RF 10-20mm F4 L IS STM
Canon · 10–20 mm · f/4 · L · Image Stabilization
Score Breakdown
Scores combine our editorial testing with published lab data.
75
SCORE /100
What We Like
+World's widest full-frame rectilinear zoom at 10mm with autofocus
+Compact and lightweight at 570g - over half the weight of predecessor EF 11-24mm f/4L USM
+Advanced image stabilization with 5 stops OIS and up to 6 stops with coordinated IBIS
+Excellent sharpness across the frame from center to edges even at extreme 10mm focal length
+Professional L-series build with dust and weather sealing and high-quality engineering
Worth Knowing
−Requires digital correction for massive distortion and vignetting at 10mm - auto-correction must remain activated
−No front filter thread compatibility; only rear gelatine filters supported
−Limited zoom range 10-20mm may feel restrictive compared to 14-35mm alternatives
−Premium pricing at approximately $2,299-$2,399 USD
General | |
|---|---|
About This LensThe Canon RF 10-20mm F4 L IS STM offers a unique zoom range providing impressive image quality that easily matches prime lenses. This is the world's first rectilinear zoom lens with a 10mm focal length and autofocus. Comparatively compact and lightweight, it delivers excellent build quality as a professional L-series lens. The lens requires digital correction due to massive distortion and vignetting at 10mm, but with auto-correction, vignetting becomes moderate and distortions negligible. | |
| Brand | Canon |
| Release Year | 2023 |
Production Status ⓘCurrent status of lens manufacturing (e.g., in production, discontinued). |  In Production |
Pro Branding ⓘSpecific branding codes used for professional-tier lenses. | L |
Lens Mount ⓘThe lens mount will tell you what type of lens range you can fit onto the camera body. Often the same camera company will have different lens ranges for different cameras. | Canon RF |
System ⓘIndicates which camera system the lens is designed to attach to. | Canon EOS R |
Maximum Format ⓘLargest sensor size compatible with the lens. |  Full Frame |
Physical93/100 | |
| Lens Weight | 570 g |
Lens Diameter ⓘWidth of the lens at its widest point | 83.7 mm |
Lens Length ⓘHow long the lens is from front to back. | 112 mm |
Front Filter Compatible ⓘSome lenses are compatible with front filters, some are compatible with back filters and some are compatible with both. Front filters are usually more convenient to add and remove. | No |
Optics71/100 | |
Focal Range ⓘShortest to longest focal length of the lens (zoom range start - end ) | 10–20 mm |
Aperture Range ⓘLargest aperture at the lens's shortest focal length to longest focal length (aperture range start - end) | 4 |
| Focal Length Angle of View | 130.42°–94° |
Flange Focal Distance ⓘDistance from lens mount to sensor. | 20 mm |
Diaphragm Type ⓘStructure and design of the aperture |  Automatic |
Blades ⓘNumber of diaphragm blades in aperture | 9020 |
Zoom Lens ⓘZoom allows you to vary the focal length, change between long shots and close-ups |  Yes |
Zoom Mechanism ⓘSystem enabling zoom function |  Manual |
Zoom Ring ⓘIf zooming is adjusted using a zoom ring |  Yes |
Zoom Type ⓘThe design or approach to zooming |  Rotary |
Closest Focusing Distance ⓘMinimum distance for a subject to be in focus. | 25 cm01500 |
Maximum Magnification ⓘLargest size a subject can be reproduced | 0.12x |
| Autofocus Mode |  Yes |
| Manual Mode |  Yes |
| Manual Focusing Ring |  Yes |
Features78/100 | |
Weather Sealing ⓘWeather sealing capabilities will give you more confidence when shooting in unfavourable conditions. |  Yes |
Fluorine Coating ⓘCoating to repel water and oil from lens elements. |  Yes |
| Built In Lens Hood |  Yes |
| Lens Hood Type |  Petal |
Zoom Lock ⓘZoom lock allows the zoom ring to be locked at the desired focal length | No |
Teleconverter ⓘA teleconverter (extender) is an extra piece of equipment that fits between the lens and the camera body to enhance magnification | No |
| Image Stabilization | Yes |
IS Efficiency ⓘIS efficiency refers to the effectiveness of the image stabilization system in compensating for the blurring effects of camera shake, quantified by the number of stops of stabilization it provides. | 5 stops |
Construction55/100 | |
Elements ⓘLens elements refer to individual pieces of glass within the lens. | 16 |
| Groups | 12 |
Aspherical Elements ⓘThe number of aspherical lens elements which can help correct aberrations such as spherical aberration. | 3 |
Bi Aspherical Elements ⓘElements with two non-spherical surfaces | 0 |
Low Dispersion ⓘElements that reduce chromatic aberration | 3 |
Super Low Dispersion ⓘAdvanced elements further reducing chromatic aberration | 1 |
CA Reduction ⓘBuilt-in features to reduce chromatic aberration | 0 |
Internal Focusing ⓘInternal Focusing means that the lens does not change in size during focusing, and the front element does not rotate. |  Yes |