Canon RF-S 10-18mm F4.5-6.3 IS STM Review: A 150-Gram Ultra-Wide for Canon APS-C
The Canon RF-S 10-18mm F4.5-6.3 IS STM is the ultra-wide that Canon’s APS-C bodies were missing. Canon announced it in November 2023 at $329.99, and it often sells for less. It weighs 150 grams and collapses to under 45mm long when stored.
On Canon’s 1.6x crop sensors it covers 16-29mm in full-frame terms. That’s wide enough for interiors, big landscapes and vlogging at arm’s length. Before this lens, R10, R50 and R7 owners had to adapt the older EF-S 10-18mm, which weighs 240 grams before you add the adapter.
Wide lenses on small cameras are a good match for travel in old cities, where narrow streets don’t let you back up.
Photo: Pixel Effects
Gordon Laing’s first-look video shows the lens on a Canon APS-C body.
Video review: Gordon Laing (first looks)
Design
The lens has 12 elements in 10 groups, with two UD elements and one aspherical. The filter thread is a small 49mm. Optical stabilization is rated at 4 stops, or 6 stops with in-body stabilization on bodies like the R7, and there’s also a Movie Digital IS mode for walking shots.
Close focus is impressive: 14cm with autofocus, and 8.6cm in manual focus at 10mm, which gives 0.5x magnification. That lets you shoot small objects with a wide background, a look that’s hard to get any other way.
To keep it small and cheap, Canon cut a few things. The mount is plastic, there’s no weather sealing, no hood in the box and no switches. A single ring handles both focus and control functions.
How it performs
Digital Camera World and Fstoppers found it sharp and contrasty for the price, especially in the center. The corners are softer, as Fstoppers noted. Uncorrected distortion is strong, but the camera fixes it automatically for JPEGs and video, and raw editors apply a profile.
The STM motor is quiet and the stabilization works well for handheld video, which made it a favorite for vlogging in both reviews. The slow aperture is the main limitation: f/4.5 to f/6.3 means higher ISO indoors and at night.
Who should buy it
Anyone with a Canon APS-C body who wants a wide view without spending much or carrying much. It’s the obvious vlogging lens for the Canon EOS R50 and R50 V, and a good travel lens on the R10. It’s also one of the best upgrades in our Canon EOS R100 lens kit.
The full-frame equivalent is the Canon RF 10-20mm F4 L IS STM, which is much better optically and about seven times the price. The RF 16mm f/2.8 is a brighter alternative if you can live with one focal length.