Canon RF 16mm f/2.8 STM Lens

The Canon RF 16mm f/2.8 STM Lens is a sleek, portable ultra-wide-angle prime designed for Canon’s full-frame RF-mount mirrorless cameras, offering an expansive 108-degree angle of view well suited to vlogging, interiors, landscapes, architecture, and astrophotography. Its compact, lightweight design and bright maximum aperture also make it an enticing choice for content creators who want a single, affordable ultra-wide lens for stills and video.

Optically, the lens offers a 16mm focal length with a maximum aperture of f/2.8 narrowing to f/22, built from 9 elements in 7 groups, including one aspherical element to limit distortion and contribute to a high degree of sharpness and accurate rendering. Canon’s Super Spectra Coating helps minimize flare and ghosting, and a rounded 7-blade diaphragm contributes to the lens’s background rendering.

Autofocus is handled by a stepping motor (STM), delivering smooth, quiet, fast, and accurate focusing performance well suited to both photo and video applications, using an electronic, focus-by-wire manual focus system rather than a direct gear-driven one. A single customizable control ring on the barrel can be used for manual focus or assigned to another camera function. A standout feature is the lens’s close-focusing capability, with a minimum focusing distance of just 5.1 in. (0.13m), yielding a relatively high 0.26x maximum magnification that allows for dramatic perspective and size differences between close and distant subjects.

Build quality uses a metal mount paired with a plastic barrel, with no weather sealing. The lens measures approximately 1.6 x 2.7 in. (40.1-40.2 x 69.2mm) when retracted and weighs just 5.8 oz. (165g), making it exceptionally compact and lightweight. It accepts an uncommon 43mm filter thread, and no hood is included (EW-65C hood sold separately). The lens does not include image stabilization and is not compatible with Canon’s extension tubes or extenders.

As a full-frame RF-mount lens, the RF 16mm f/2.8 STM delivers its full ultra-wide angle of view on Canon full-frame RF-mount bodies while remaining compatible with Canon APS-C RF-mount cameras at a narrower, approximately 24mm-equivalent effective field of view.

Key Features
– 16mm f/2.8 ultra-wide-angle prime lens for Canon RF mount
– 108° angle of view
– 9 elements in 7 groups, including 1 aspherical element
– Super Spectra Coating
– STM stepping motor autofocus (focus-by-wire)
– Single customizable control ring
– Rounded 7-blade diaphragm
– Minimum focusing distance of 5.1 in. (0.13m); 0.26x maximum magnification
– 43mm filter thread (hood sold separately)
– No image stabilization; not weather-sealed
– Not compatible with extension tubes or extenders
– Extremely compact, lightweight design (approximately 165g)
– Compatible with Canon full-frame and APS-C RF-mount cameras