Home Lenses Canon RF 10–20mm F4 L IS STM Canon · RF
Released October 2023
A full-frame rectilinear ultra-wide zoom for EOS R cameras with a constant f/4 maximum aperture, STM autofocus, optical stabilisation, a rear gelatine-filter holder and a built-in hood.
Compare with another lens Compare with… RF 20-50mm F4L IS USM PZ (2026) RF 14mm F1.4L VCM (2026) RF 7-14mm F2.8-3.5L FISHEYE STM (2026) RF 45mm F1.2 STM (2025) RF 85mm F1.4L VCM (2025) RF 75–300mm F4–5.6 (2025) RF 20mm F1.4 L VCM (2025) RF-S 14–30mm F4–6.3 IS STM PZ (2025) RF 16–28mm F2.8 IS STM (2025) RF 24mm F1.4 L VCM (2024) RF 50mm F1.4 L VCM (2024) RF 70-200mm F2.8L IS USM Z (2024) RF 28–70mm F2.8 IS STM (2024) RF 35mm F1.4 L VCM (2024) RF 200–800mm F6.3–9 IS USM (2023) RF 24-105mm F2.8 L IS USM Z (2023) RF-S 10–18mm F4.5–6.3 IS STM (2023) RF 28mm F2.8 STM (2023) RF 100–300mm F2.8L IS USM (2023) RF 24–50mm F4.5–6.3 IS STM (2023) RF-S 55–210mm F5–7.1 IS STM (2023) RF 135mm F1.8 L IS USM (2023) RF 15–30mm F4.5–6.3 IS STM (2022) RF 24mm F1.8 MACRO IS STM (2022) RF-S 18–150mm F3.5–6.3 IS STM (2022) RF-S 18–45mm F4.5–6.3 IS STM (2022) RF 1200mm F8L IS USM (2022) RF 800mm F5.6L IS USM (2022) RF 100–400mm F5.6–8 IS USM (2021) RF 16mm F2.8 STM (2021) RF 14–35mm F4 L IS USM (2021) RF 100mm F2.8 L Macro IS USM (2021) RF 400mm F2.8L IS USM (2021) RF 600mm F4L IS USM (2021) RF 70–200mm F4 L IS USM (2021) RF 50mm F1.8 STM (2020) RF 85mm F2 MACRO IS STM (2020) RF 100–500mm F4.5–7.1L IS USM (2020) RF 600mm F11 IS STM (2020) RF 800mm F11 IS STM (2020) RF 24–105mm F4–7.1 IS STM (2020) RF 85mm F1.2 L USM DS (2019) RF 70–200mm F2.8 L IS USM (2019) RF 15–35mm F2.8 L IS USM (2019) RF 24–240mm F4–6.3 IS USM (2019) RF 24–70mm F2.8L IS USM (2019) RF 85mm F1.2 L USM (2019) RF 28–70mm F2 L USM (2018) RF 35mm F1.8 MACRO IS STM (2018) RF 24–105mm F4L IS USM (2018) RF 50mm F1.2 L USM (2018) EF 70–200mm f/2.8L IS III USM (2018) EF 70–200mm f/4L IS II USM (2018) EF 85mm f/1.4L IS USM (2017) EF-S 35mm f/2.8 Macro IS STM (2017) EF-S 18–55mm f/4–5.6 IS STM (2017) EF 16–35mm f/2.8L III USM (2016) EF-S 18–135mm f/3.5–5.6 IS USM (2016) EF 24–105mm f/4L IS II USM (2016) EF 35mm f/1.4L II USM (2015) EF 50mm f/1.8 STM (2015) EF 24–105mm f/3.5–5.6 IS STM (2014) EF-S 24mm f/2.8 STM (2014) EF-S 10–18mm f/4.5–5.6 IS STM (2014) EF-S 55–250mm f/4–5.6 IS STM (2013) EF-S 18–55mm f/3.5–5.6 IS STM (2013) EF 24–70mm f/4L IS USM (2012) EF 35mm f/2 IS USM (2012) EF 24–70mm f/2.8L II USM (2012) EF 24mm f/2.8 IS USM (2012) EF 28mm f/2.8 IS USM (2012) EF-S 18–135mm f/3.5–5.6 IS STM (2012) EF-S 55–250mm f/4–5.6 IS II (2011) EF-S 18–55mm f/3.5–5.6 III (2011) EF-S 18–55mm f/3.5–5.6 IS II (2011) EF 70–200mm f/2.8L IS II USM (2010) EF 100mm f/2.8L Macro IS USM (2009) EF-S 15–85mm f/3.5–5.6 IS USM (2009) EF-S 18–135mm f/3.5–5.6 IS (2009) EF 24mm f/1.4L II USM (2008) EF-S 18–200mm f/3.5–5.6 IS (2008) EF-S 55–250mm f/4–5.6 IS (2007) EF-S 18–55mm f/3.5–5.6 IS (2007) EF 50mm f/1.2L USM (2007) EF 16–35mm f/2.8L II USM (2007) EF 70–200mm f/4L IS USM (2006) EF-S 17–55mm f/2.8 IS USM (2006) EF 85mm f/1.2L II USM (2006) EF-S 18–55mm f/3.5–5.6 II (2005) EF-S 18–55mm f/3.5–5.6 II USM (2005) EF-S 60mm f/2.8 Macro USM (2005) EF 24–105mm f/4L IS USM (2005) EF-S 10–22mm f/3.5–4.5 USM (2004) EF-S 17–85mm f/4–5.6 IS USM (2004) EF-S 18–55mm f/3.5–5.6 USM (2003) EF 24–70mm f/2.8L USM (2002) EF 16–35mm f/2.8L USM (2001) EF 70–200mm f/2.8L IS USM (2001) EF 100mm f/2.8 Macro USM (2000) EF 70–200mm f/4L USM (1999) EF 35mm f/1.4L USM (1998) EF 24mm f/1.4L USM (1997) EF 135mm f/2L USM (1996) EF 200mm f/2.8L II USM (1996) EF 28mm f/1.8 USM (1995) EF 70–200mm f/2.8L USM (1995) EF 50mm f/1.4 USM (1993) EF 85mm f/1.8 USM (1992) EF 200mm f/2.8L USM (1991) EF 50mm f/1.8 II (1990) EF 35mm f/2 (1990) EF 100mm f/2.8 Macro (1990) EF 80–200mm f/2.8L (1989) EF 85mm f/1.2L USM (1989) EF 24mm f/2.8 (1988) EF 28mm f/2.8 (1987) EF 50mm f/1.8 (1987) NIKKOR Z 70–200mm f/2.8 VR S II (2026) NIKKOR Z 24–105mm f/4–7.1 (2026) NIKKOR Z DX 16–50mm f/2.8 VR (2025) NIKKOR Z DX MC 35mm f/1.7 (2025) NIKKOR Z 24-70mm f/2.8 S II (2025) NIKKOR Z 28-135mm f/4 PZ (2025) NIKKOR Z 35mm f/1.2 S (2025) NIKKOR Z 50mm f/1.4 (2024) NIKKOR Z 35mm f/1.4 (2024) NIKKOR Z 28-400mm f/4-8 VR (2024) NIKKOR Z 135mm f/1.8 S Plena (2023) NIKKOR Z 600mm f/6.3 VR S (2023) NIKKOR Z 180-600mm f/5.6-6.3 VR (2023) NIKKOR Z 70-180mm f/2.8 (2023) NIKKOR Z DX 24mm f/1.7 (2023) NIKKOR Z DX 12-28mm f/3.5-5.6 PZ VR (2023) NIKKOR Z 26mm f/2.8 (2023) NIKKOR Z 85mm f/1.2 S (2023) NIKKOR Z 600mm f/4 TC VR S (2022) NIKKOR Z 17-28mm f/2.8 (2022) NIKKOR Z 400mm f/4.5 VR S (2022) NIKKOR Z 800mm f/6.3 VR S (2022) NIKKOR Z 400mm f/2.8 TC VR S (2022) NIKKOR Z 28-75mm f/2.8 (2022) NIKKOR Z 100-400mm f/4.5-5.6 VR S (2021) NIKKOR Z 24-120mm f/4 S (2021) NIKKOR Z DX 18-140mm f/3.5-6.3 VR (2021) NIKKOR Z 40mm f/2 (2021) NIKKOR Z 28mm f/2.8 (2021) NIKKOR Z MC 105mm f/2.8 VR S (2021) NIKKOR Z MC 50mm f/2.8 (2021) NIKKOR Z 50mm f/1.2 S (2020) NIKKOR Z 14-24mm f/2.8 S (2020) NIKKOR Z 24-50mm f/4-6.3 (2020) NIKKOR Z 70-200mm f/2.8 VR S (2020) NIKKOR Z 24-200mm f/4-6.3 VR (2020) NIKKOR Z 20mm f/1.8 S (2020) NIKKOR Z DX 16-50mm f/3.5-6.3 VR (2019) NIKKOR Z DX 50-250mm f/4.5-6.3 VR (2019) NIKKOR Z 58mm f/0.95 S Noct (2019) NIKKOR Z 24mm f/1.8 S (2019) NIKKOR Z 85mm f/1.8 S (2019) NIKKOR Z 24-70mm f/2.8 S (2019) NIKKOR Z 14-30mm f/4 S (2019) NIKKOR Z 50mm f/1.8 S (2018) NIKKOR Z 24-70mm f/4 S (2018) NIKKOR Z 35mm f/1.8 S (2018) AF-S NIKKOR 500mm f/5.6E PF ED VR (2018) AF-S NIKKOR 180-400mm f/4E TC1.4 FL ED VR (2018) AF-S NIKKOR 28mm f/1.4E ED (2017) AF-S NIKKOR 70–200mm f/2.8E FL ED VR (2016) AF-S NIKKOR 105mm f/1.4E ED (2016) AF-S NIKKOR 24-70mm f/2.8E ED VR (2015) AF-S NIKKOR 200–500mm f/5.6E ED VR (2015) AF-S NIKKOR 24mm f/1.8G ED (2015) AF-S NIKKOR 500mm f/4E FL ED VR (2015) AF-S NIKKOR 600mm f/4E FL ED VR (2015) AF-S NIKKOR 20mm f/1.8G ED (2014) AF-S NIKKOR 400mm f/2.8E FL ED VR (2014) AF-S DX NIKKOR 18–300mm f/3.5–6.3G ED VR (2014) AF-S NIKKOR 35mm f/1.8G ED (2014) AF-S DX NIKKOR 18-140mm f/3.5-5.6G ED VR (2013) AF-S NIKKOR 800mm f/5.6E FL ED VR (2013) AF-S NIKKOR 28mm f/1.8G (2012) AF-S NIKKOR 85mm f/1.8G (2012) AF-S DX Micro NIKKOR 40mm f/2.8G (2011) AF-S NIKKOR 50mm f/1.8G (2011) AF-S NIKKOR 35mm f/1.4G (2010) AF-S NIKKOR 24–120mm f/4G ED VR (2010) AF-S NIKKOR 85mm f/1.4G (2010) AF-S NIKKOR 24mm f/1.4G ED (2010) AF-S NIKKOR 16–35mm f/4G ED VR (2010) AF-S DX NIKKOR 35mm f/1.8G (2009) AF-S NIKKOR 50mm f/1.4G (2008) AF-S NIKKOR 14–24mm f/2.8G ED (2007) FE 400mm F4.5 GM OSS (2026) FE 600mm F6.3 GM OSS (2026) FE 8–14mm F3.5 Fisheye G (2026) FE 100–400mm F5.6–8 OSS (2026) FE 100–400mm F4.5 GM OSS (2026) FE 28-70mm F3.5-5.6 OSS II (2026) FE 100mm F2.8 Macro GM OSS (2025) FE 50–150mm F2 GM (2025) FE 16mm F1.8 G (2025) FE 400–800mm F6.3–8 G OSS (2025) FE 28–70mm F2 GM (2024) FE 85mm F1.4 GM II (2024) E PZ 16-50mm F3.5-5.6 OSS II (2024) FE 16-25mm F2.8 G (2024) FE 24-50mm F2.8 G (2024) FE 300mm F2.8 GM OSS (2024) FE 16–35mm F2.8 GM II (2023) FE 70-200mm F4 Macro G OSS II (2023) FE 50mm F1.4 GM (2023) FE 20-70mm F4 G (2023) E 11mm F1.8 (2022) E 15mm F1.4 G (2022) E PZ 10-20mm F4 G (2022) FE 24–70mm F2.8 GM II (2022) FE PZ 16-35mm F4 G (2022) FE 70–200mm F2.8 GM OSS II (2021) FE 14mm F1.8 GM (2021) FE 24mm F2.8 G (2021) FE 40mm F2.5 G (2021) FE 50mm F1.2 GM (2021) FE 50mm F2.5 G (2021) FE 35mm F1.4 GM (2021) FE 28-60mm F4-5.6 (2020) FE 12-24mm F2.8 GM (2020) FE 20mm F1.8 G (2020) E 70-350mm F4.5-6.3 G OSS (2019) E 16-55mm F2.8 G (2019) FE 35mm F1.8 (2019) FE 200-600mm F5.6-6.3 G OSS (2019) FE 600mm F4 GM OSS (2019) FE 135mm F1.8 GM (2019) FE 24mm F1.4 GM (2018) FE 400mm F2.8 GM OSS (2018) E 18-135mm F3.5-5.6 OSS (2018) FE 24-105mm F4 G OSS (2017) FE 100-400mm F4.5-5.6 GM OSS (2017) FE 12-24mm F4 G (2017) FE 16-35mm F2.8 GM (2017) FE 100mm F2.8 STF GM OSS (2017) FE 85mm F1.8 (2017) E PZ 18-110mm F4 G OSS (2016) FE 50mm F2.8 Macro (2016) FE 70-200mm F2.8 GM OSS (2016) Planar T* FE 50mm F1.4 ZA (2016) FE 50mm F1.8 (2016) FE 70-300mm F4.5-5.6 G OSS (2016) FE 24-70mm F2.8 GM (2016) FE 85mm F1.4 GM (2016) FE 90mm F2.8 Macro G OSS (2015) Distagon T* FE 35mm F1.4 ZA (2015) FE 24-240mm F3.5-6.3 OSS (2015) FE 28mm F2 (2015) FE PZ 28-135mm F4 G OSS (2014) Vario-Tessar T* FE 16-35mm F4 ZA OSS (2014) FE 70-200mm F4 G OSS (2014) Vario-Tessar T* FE 24-70mm F4 ZA OSS (2014) E PZ 18-105mm F4 G OSS (2013) Sonnar T* FE 55mm F1.8 ZA (2013) 70-200mm F2.8 G SSM II (2013) Sonnar T* FE 35mm F2.8 ZA (2013) Vario-Tessar T* E 16-70mm F4 ZA OSS (2013) Planar T* 50mm F1.4 ZA SSM (2013) E 20mm F2.8 (2013) E 10-18mm F4 OSS (2012) E 35mm F1.8 OSS (2012) E PZ 18-200mm F3.5-6.3 OSS (2012) E 18-200mm F3.5-6.3 OSS LE (2012) E 50mm F1.8 OSS (2011) Sonnar T* E 24mm F1.8 ZA (2011) DT 16–50mm F2.8 SSM (2011) E 55-210mm F4.5-6.3 OSS (2011) E 30mm F3.5 Macro (2011) DT 35mm F1.8 SAM (2010) E 16mm F2.8 (2010) DT 30mm F2.8 Macro SAM (2009) DT 50mm F1.8 SAM (2009) Vario-Sonnar T* 16-35mm F2.8 ZA SSM (2009) Vario-Sonnar T* 24–70mm F2.8 ZA SSM (2008) Vario-Sonnar T* DT 16–80mm F3.5–4.5 ZA (2007) Planar T* 85mm F1.4 ZA (2006) Sonnar T* 135mm F1.8 ZA (2006) 70–200mm F2.8 G (2006) 50mm F1.4 (2006) 50mm F2.8 Macro (2006)
Mount Canon RF
Focal length 10–20 mm
Max aperture f/4
Stabilisation Yes
Weight 570 g What reviewers say Both reviews praise the compact construction, handling and sharp corrected images, while stressing the dependence on digital correction and specialised angle of view. TechRadar finds strong edge performance but limited versatility. OpticalLimits sees softer corners at 10mm and variable flare resistance. TechRadar's handheld stabilisation test also falls short of Canon's advertised best-case performance.
From opticallimits.com and techradar.com
Optics
Lens type Zoom
Focal length 10–20 mm
Maximum aperture f/4
Minimum aperture f/22
Optical construction Sixteen elements in twelve groups; designed for use with digital distortion correction
Special elements One Super UD, three UD and three glass-moulded aspherical elements; one element is both UD and aspherical
Coatings ASC, Super Spectra and SWC coatings; front fluorine coating
Diaphragm Nine aperture blades
Angle of view 130°25′–94° diagonal, 121°55′–84° horizontal and 100°25′–62° vertical
Projection Rectilinear Mount and compatibility
Mounts Canon RF
Image circle Full frame
Compatibility Canon RF mount for full-frame and APS-C EOS R cameras
Teleconverter support Not compatible with Canon RF extenders Focus and stabilisation
Autofocus Yes
Minimum focus distance 0.25 m
Maximum magnification 0.12×
Optical stabilisation Yes
Autofocus detail STM autofocus optimised for smooth, near-silent focusing in stills and video
Focus distance detail Minimum focus 0.25 m
Magnification detail Maximum 0.12× at 20 mm and 0.06× at 10 mm
Stabilisation detail Up to five stops optical stabilisation tested with EOS R at 20 mm, or six stops coordinated stabilisation with EOS R3 at 20 mm; CIPA yaw and pitch testing. Peripheral Coordinated Control IS also compensates for peripheral blur Design
Dust and moisture resistant Yes
Maximum diameter 83.7 mm
Length 112 mm
Weight 570 g
Controls Separate zoom, focus and customisable control rings; customisable AF stop/function button
Filter detail No front filter thread; rear holder accepts 35 × 20 mm gelatine filters
Weather resistance Dust and moisture resistant construction with front fluorine coating
Dimensions detail 83.7 mm maximum diameter × 112 mm length
Weight detail Approximately 570 g lens
Lens hood Built-in lens hood
In the box Lens, RF dust cap, Lens Cap 10-20, LP1219 lens case and user manual
Release detail October 2023 marketed month in Canon Camera Museum Pros and cons Pros + 10 mm rectilinear wide end+ Optical stabilisation with peripheral coordinated control+ 570 g lens weightCons − No front filter thread− Constant f/4 maximum aperture
