Canon RF 10-20mm F/4 L IS STM

Specifications01

MountCANON RF

Focal length10-20mm

Max aperturef/4

TypeCinema · Wide · Zoom

Weight570 g

Physical length111.8 mm

Min focus distance0.249 m

Max magnification0.0833

Aperture blades9

Optical elements16

Groups12

Min aperturef/22

Lens hoodpetal-shaped (built-in)

Additional Info02

ModelL IS STM

FormatFF

SeriesRF

Category["Canon RF"]

Keywords["Canon","Ultra-wide","Zoom"]

Iris Blades9

Review AuthorKlaus

Other Featuresweather-sealing, image stabilizer (5 f-stops), additional control ring, fluorine coating

Review VerdictIt's a Canon L lens so it's no surprise that the Canon RF 10-20mm f/4 L IS STM comes with a good portion of greatness ... and a steep price tag. Its zoom range is more than just exotic - it is unique (at the time of this review) while still providing impressive image quality that easily matches prime lenses in this range. It's very sharp across the image frame at 14mm and 20mm, and it's no slouch either at 10mm (for such a lens this wide). However, it is highly advisable to leave image auto-correction activated all the time. Technically, this is an under-designed lens which requires digital correction due to massive image distortion and vignetting at 10mm. With auto-correction, the vignetting is moderate and image distortions are negligible. Lateral CAs are also not an issue. Flare performance is a bit of a mixed bag but it can usually be avoided if you are a bit flexible with your composition. Sun stars are nicely rendered at small aperture settings. The build quality of the Canon lens is excellent. The engineered plastics are of high quality and the zoom rings turn smoothly. The lens features dust- and weather sealing as you'd expect from a professional grade lens. The AF may only rely on a stepping motor but, even so, it's fast and noiseless. The image stabiliser is certainly also a very welcome feature for indoor and low-light shooting. Some may ask the viable question about the usefulness of a 10mm setting. Ultra-wide lenses emphasize the foreground, and it's not trivial to find a very near foreground that is really interesting enough to be included. Still, the lens isn't limited to 10mm, so more sane ultra-wide images are possible anyway. Needless to say but the Canon RF 10-20mm f/4 L IS STM is an expensive beast. However, if it's within your budget, it's worth it. In the right hands, it can certainly produce stunning results. Thus ... Highly Recommended! If you'd like to support our work, please consider shopping for this or other lenses via one of the following partners: * Amazon US * Amazon Europe * B&H US * Adorama US * KEH US (used gear)

Review Published2024-06-23T05:53:53+00:00

Optical Construction16 elements in 12 groups (1x SUD, 3x UD, 3x aspherical)

Field Notes02

Canon RF 10-20mm F4 L IS STM is an ultra-wide zoom lens for Canon RF full-frame mirrorless cameras, suitable for landscapes and architecture. Fixed f/4 aperture with image stabilization for steadier handheld shooting.

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Catalog note · source: cinelenswiki