Moving to the ultra-wide Canon RF 16mm F2.8 STM gives you a whole new view on landscapes, as shooting at 16mm increases the viewing angle from 84° to just over 108°, which is a massive difference in practice.
The expansive viewing angle works wonders for landscape photography and in-camera correction delivers distortion-free results. It also offers a useful 25.6mm effective focal length when used with the APS-C-format Canon EOS R10, but the Canon RF-S 10-18mm F4.5-6.3 IS STM goes further still with an 'effective' zoom range of 16-29mm in full-frame terms. It's also one of the best Canon vlogging lenses, letting you talk to camera while taking in a big backdrop to pull in the scenery, ideal for landscape and travel vlogs.
With its retractable design, the Canon RF-S 10-18mm F4.5-6.3 IS STM is a small and light ultra-wide zoom lens that weighs just 150g. For landscape photographers with APS-C format EOS R System cameras, it's the perfect addition to an RF-S 18-45mm F4.5-6.3 IS STM kit lens, giving a seamless progression in wide-angle zoom potential.
Further bonuses of the Canon RF-S 10-18mm F4.5-6.3 IS STM include 4-stop optical IS that works with any Canon EOS R System camera (you can also use it on a full-frame body in APS-C crop mode). When mounted on cameras like the Canon EOS R7 that feature IBIS, it rises to 6-stop effectiveness, allowing you to confidently shoot handheld in near-darkness. You can also switch to manual focus mode and shoot extreme close-ups at up to 0.5x macro magnification. It's ideal for picking out tiny details such as a single flower and setting them against a sweeping backdrop.
Wide-angle lenses can capture vast landscapes, but they also exaggerate the perspective effect, with everything apart from close foreground areas appearing to rapidly recede into the distance. To give a 3D look to wide-angle landscape images, it often works best to pick out some objects of interest in the foreground that will help lead the viewer's eye into the frame. A narrow aperture setting of around f/11 to f/16 will extend your depth of field, enabling you to keep everything sharp from close foreground objects to the distant horizon.