Canon RF 28-70mm F/2L USM

This Canon zoom spans 28–70mm on full-frame RF cameras. Its f/2 maximum aperture stays available across the range, which suits weddings and events in dim venues. The short end includes people with their surroundings, while the long end gives tighter views from the same position. Canon introduced it in 2018.

The main trade-off is size. The lens is heavy and wide, so consider how you will carry it between locations and support it through a long session. It suits photographers who often need the bright aperture and can accommodate the bulk.

The lens weighs 3 lb 2.4 oz (1430 g) and measures 4.09 in (103.8 mm) across and 5.5 in (139.8 mm) long. Consider the camera and lens together when planning handheld work. Screw-in filters must match the 95mm front thread to attach directly.

At 28mm, you can include a group or show a venue with some surroundings. At 70mm, one person or a table detail becomes larger from the same position. How much of a room fits depends on where you stand. A wider lens can help in tight interiors.

The maximum aperture remains f/2 throughout the zoom. You can retain that opening when framing changes, though a different part of the scene may need a different exposure. In dim light, f/2 gives more room for a faster shutter speed or lower ISO than a smaller opening.

At close portrait distances, f/2 can give a thin zone of sharp focus. Focus on the eye that matters most. A background far behind the person can become soft. Stop down when more of the face or another person needs to stay sharp.

Closest focus is 1.3 ft (39 cm), measured from the sensor. Maximum magnification is 0.18x, useful for food and everyday details. Tiny objects remain modest in the frame. Leave room ahead of the glass and avoid shading a nearby subject.

There is no stabilization in the lens. A camera with body stabilization can help with shake for still scenes. Firm support also helps at slower shutter speeds. Opening the aperture may allow a faster shutter, but it does not provide stabilization or freeze every movement.

Dust and moisture resistance help during outdoor events. Use cover in persistent rain. Fluorine coating helps water and oily marks wipe away from the front glass. Remove loose grit before using a cloth.

The zoom lock secures the barrel at its retracted 28mm setting for carrying. Release it before changing focal length. This helps prevent unwanted extension between locations.

Four aspherical elements help correct distortion and spherical aberration, which can bend lines or soften detail. Two UD elements and one Super UD element help reduce coloured fringes along high-contrast edges. A bright window behind a speaker is one place those fringes can appear.