Canon RF-S 10-18mm f/4.5-6.3 IS STM review: the APS-C lens we've waited for

The Canon RF-S 10-18mm is a tiny lens with a big field of view

Canon RF-S 10-18mm lens attached to a Canon EOS R7 camera and and held in a hand
(Image: © Gareth Bevan / Digital Camera World)

Digital Camera World Verdict

The Canon RF-S 10-18mm f/4.5-6.3 IS STM is an excellent wide-angle lens for Canon's smaller EOS R cameras. With a competitive price, it's an appealing option for newcomers to vlogging, videography, or wide-angle photography. The lens is incredibly compact, especially on cameras like the EOS R100. The 10-18mm delivers sharp clear photos, although it does rely a lot on in-camera distortion corrections, but that seems to be the new normal. With its fast and silent STM motor, the RF-S 10-18mm is my new top choice for a Canon vlogging lens.


  • +

    Tiny compact size

  • +

    Solid image quality

  • +

    Autofocus is quick and silent for video

  • +

    Works on both RF-S and RF cameras


  • -

    Narrow aperture struggled in low light

  • -

    Significant distortion if uncorrected

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Since it first came onto the scene, the RF-S mount has struggled a little to find its place. With Canon’s need to fill out its lens lineup for its professional RF mount cameras, lenses specifically made for the RF-S mount have been few and far between – and some have even speculated that it might end up meeting the same fate as the EF-M mount used by EOS-M cameras. 

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Lens construction12 elements/10 groups
Special Optics2x UD, 1x PMO
Diaphragm blades7
Aperturef/4.5-6.3 (max), f/22-32 (min)
Close focusing distance0.14m (AF), 0.086m (MF)
Maximum magnification0.23x (AF), 0.5x (MF - 10mm)
Image stabilization4 stops (OIS), 6 stops (OIS+IBIS)
Filter diameter49mm
Size (diameter x length)69 x 46.3 mm / 2.72 x 1.82 in
Weight150 g / 5.29 oz
Canon RF 16mm f/2.8 STM

The Canon RF 16mm f/2.8 STM’s wide aperture might make up for its narrower field of view. A wider aperture will let you shoot better quality images in low light, as well as offer a shallower depth of field for more professional-looking footage. Many people also find the simplicity of primes and a constant aperture easier to work with. The downside, you lose optical image stabilization, which is important if you move and shoot a lot.

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

If you are a discerning professional or just money is no object, then look no further than the Canon RF 10-20mm f/4L IS STM, which our reviewer called one of the best wide-angle lenses ever made. Sure it is significantly more expensive and much much larger than the RF-S 10-18mm, but this is a different league in terms of pure image quality. 

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