Canon RF 15-35mm F/2.8L IS USM

Canon introduced this zoom in 2019 for its RF mount on full-frame mirrorless cameras. The 15–35mm span suits landscape, architecture and interior work. Events in cramped venues also fit, since the wide end helps when there is little room to step back.

At 15mm the lens delivers its widest framing. The 35mm end pulls in toward a moderate wide angle for street scenes or environmental portraits, so one lens covers a wide spread of work.

Weight is the main trade-off to consider for a walking kit. Check the space needed for the lens, hood and filters before a trip, especially if you also need a longer lens for distant details.

This is a substantial lens at 1 lb 13.6 oz (840 g). The front thread accepts 82mm screw-in filters, so a polarizer for cutting glare or an ND filter for smoothing water can screw straight on for landscape work.

At 15mm, the ultra-wide view can include a large part of a room or landscape. How much fits depends on your position and the scene. Moving close to a rock or gatepost makes it larger relative to the background. Check the borders for distractions and unwanted foreground.

The 35mm end gives a more moderate wide view. From the same position, it selects a smaller part of the scene. Use the zoom to refine a composition, and move the camera when you want to change the relationship between near and distant objects.

The f/2.8 maximum aperture stays available throughout the zoom. At a given shutter speed, it can allow a lower ISO in a dim church or at dusk. Depth of field depends on focus distance as well as aperture. A close subject can have a soft background, even with a wide view.

Closest focus is 0.9 ft (28 cm), measured from the sensor. This range can help place a flower or carved detail in the foreground. Leave room ahead of the lens for light. Stop down when more depth is needed, then check both near and distant details.

Image stabilization is built in. It steadies the camera for handheld frames in low light, whether you shoot a dim interior or a blue-hour skyline. It supports your hands, not a moving subject, so swaying branches or walking people still need a fast shutter speed.

Dust and moisture sealing fits the outdoor work a wide zoom invites. That resistance is not a licence for shooting through heavy rain, but it eases coastal walks and damp mornings. A fluorine coating helps water and oil slide off, so spray and fingerprints wipe away more easily.

There is no zoom lock switch. Check the selected focal length before a sequence and after moving the camera. Dry the exterior before storage after a damp session.

The 16-element, 12-group design includes three aspherical elements and two UD elements. Aspherical surfaces help correct distortion and spherical aberration. Distortion can make straight walls or doorframes appear curved. UD glass helps reduce coloured fringes along high-contrast edges, such as branches against bright sky. These features do not establish measured image quality.