The Canon RF 28-70mm f/2.8 IS STM is a standard zoom for full-frame cameras that delivers L-series optical quality in a remarkably compact, retractable body, making it an ideal everyday lens for photographers and videographers using Canon RF-mount cameras. It offers a constant f/2.8 maximum aperture across a versatile 28mm to 70mm focal range, giving the freedom to move from wide scenes to flattering portraits without sacrificing light-gathering ability or sharpness.
With two UD elements, two aspherical elements and Canon’s Super Spectra Coating (SSC), this lens controls chromatic aberration, flare and internal reflections precisely. Combined with a silent STM autofocus motor and optical image stabilization rated at up to 7.5 stops when paired with compatible in-body stabilization, the RF 28-70mm f/2.8 IS STM ensures sharp results whether you are shooting stills or executing smooth focus transitions in video.
Key Features
- Constant f/2.8 aperture across the whole zoom range: Allows beautiful background separation and dependable low-light performance from 28mm to 70mm, ideal for portrait, event and indoor photography.
- Image stabilization up to 7.5 stops: The built-in optical IS provides up to 5.5 stops of shake correction on its own, rising to 7.5 stops when combined with the in-body stabilization of a compatible Canon camera, which matters greatly for handheld and natural-light shooting.
- L-series optical quality in a compact body: Two UD elements at the front of the optical design correct chromatic aberration while reducing the weight of the front group, bringing image quality up to Canon L-series standards in a smaller, more affordable package.
- Silent STM autofocus with focus breathing control: The stepping motor autofocus system acquires subjects quickly and silently, while suppressed focus breathing ensures smooth, professional transitions while recording video.
- Retractable, weather-sealed body: The retractable design keeps the lens as small as possible when not shooting, while sealing borrowed from Canon’s L-series lenses protects against dust and moisture in demanding conditions.
- Customisable control ring and Super Spectra Coating: The comfortable control ring can be customised for exposure or focus functions for easier, more intuitive shooting, while SSC reduces flare and internal reflections in backlit, high-contrast scenes to preserve colour accuracy.
Specifications
| Mount | Canon RF |
|---|---|
| Sensor Compatibility | Full-Frame |
| Focal Length | 28-70mm |
| Maximum Aperture | f/2.8 (constant) |
| Minimum Aperture | f/22 |
| Image Stabilization | Optical IS – up to 5.5 stops alone, up to 7.5 stops with in-body stabilization |
| Autofocus Motor | STM stepping motor – fast and silent |
| Optical Elements | Two UD elements and two glass-moulded aspherical elements |
| Coating | Super Spectra Coating (SSC) |
| Special Features | Retractable design, customisable control ring, dust- and moisture-sealed body |
Frequently Asked Questions
What is the difference between the Canon RF 28-70mm f/2.8 IS STM and the RF 24-70mm f/2.8 L?
The RF 28-70mm f/2.8 IS STM focuses on providing a smaller, lighter, retractable body at a more accessible price, compared with the wider 24mm starting point of the L-series RF 24-70mm f/2.8 L. Canon designed this lens to deliver comparable L-series optical quality using two UD elements and two aspherical elements, but in a more compact, portable package.
What level of image stabilization can I expect when using this lens with a Canon camera that has in-body stabilization?
The lens has a built-in optical stabilizer rated at up to 5.5 stops of correction when used on its own. Paired with a compatible Canon camera that has in-body stabilization, the combined system is rated at up to 7.5 stops, allowing confident handheld shooting in low light and at slower shutter speeds.
Is the Canon RF 28-70mm f/2.8 IS STM suitable for video?
Yes. The silent STM autofocus motor operates quietly while recording without intrusive noise, and focus breathing is well controlled for smooth, cinematic focus transitions. The built-in optical IS helps reduce camera shake during handheld video, and the customisable control ring allows quiet, intuitive adjustment of exposure or focus while filming.
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