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Certified Keeper Canon RF 10-20mm f/4 L IS STM
88 PixelMeter Score 16 reviews

Pros Pros
  • Exceptional sharpness and image quality
  • Compact and lightweight construction
  • Fast, quiet, and reliable autofocus
  • Effective optical image stabilization
  • Unique, extreme ultra-wide focal range
Cons Cons
  • Heavy reliance on digital distortion and vignetting correction
  • High price point
  • Inability to use standard front filters
  • Reduced corner sharpness and image quality after corrections

Launch price Launch price $2,299
Focal length & aperture Focal length & aperture 10-20mm f/4
Mount & coverage Mount & coverage Canon RF · Full-Frame
Stabilization Stabilization Optical IS, 5 stops (CIPA)
Close focus Close focus 25 cm (0.12x)
Autofocus motor Autofocus motor STM
Weight & size Weight & size 570g (1 lb 4.1 oz) · 83.7 x 112 mm (3.30 x 4.41 in)

Announcement date Announcement date October 11, 2023
Launch MSRP Launch MSRP $2,299
Lens mount Lens mount Canon RF
Image circle coverage Image circle coverage Full-Frame
Lens type Lens type Zoom
Lens line / series Lens line / series L-series

Elements Elements 16
Groups Groups 12
Special elements Special elements 3 aspherical, 3 UD, 1 Super UD
Coatings Coatings SWC (Subwavelength Structure Coating), ASC (Air Sphere Coating), Fluorine coating
Front fluorine coating Front fluorine coating Yes

Focal length (wide) Focal length (wide) 10mm
Focal length (tele) Focal length (tele) 20mm
Max aperture Max aperture f/4
Minimum aperture Minimum aperture f/22
Diaphragm blades Diaphragm blades 9

Diagonal angle of view Diagonal angle of view 130° - 25°

Autofocus motor Autofocus motor STM
Minimum focus distance Minimum focus distance 25 cm
Maximum magnification Maximum magnification 0.12x
Focus mechanism Focus mechanism Internal focus

Optical stabilization (OIS) Optical stabilization (OIS) Yes
OIS rating OIS rating 5 stops

Aperture ring Aperture ring No
AF/MF switch AF/MF switch Yes

Weight Weight 570g (1 lb 4.1 oz)
Maximum diameter Maximum diameter 83.7mm (3.30 in)
Length Length 112mm (4.41 in)
Weather sealing Weather sealing Full weather sealing
Internal zoom Internal zoom No
Tripod collar Tripod collar Not supported

Lens hood Lens hood EW-103, included
Teleconverter compatibility Teleconverter compatibility Not supported