Taking advantage of the large aperture and short back focus^*1 features of the RF mount, a large-aperture lens has been placed close to the imaging surface. This enables the lens to cover focal lengths from 24 mm to 105 mm while providing a maximum aperture of f/2.8 across the entire zoom range, thereby helping to address a wide range of shooting needs for both photos and videos. In addition, thanks to a new optical design consisting of 23 lenses in 18 groups, which effectively arranges 3 aspherical lenses and 4 UD lenses^*2, the lens achieves high image quality on par with the renowned RF24-70 mm F2.8 L IS USM (released in September 2019).

The lens incorporates a 5.5-stop^*3 optical image stabilization mechanism. When mounted on an EOS R series camera equipped with an in-body image stabilization mechanism, it allows camera-lens coordination. For example, when attached to the EOS R3 (released in November 2021), the combination realizes 8.0-stop^*4 image stabilization. In addition, this lens was the first RF lens to include an iris ring with a light and smooth operability similar to that of a cinema lens, making it possible to control bokeh and exposure adjustments more intuitively in video shooting.

*1 Meaning that the distance between the image capture surface of the sensor and the nearest lens surface is short.
*2 Lens made of UD (ultra-low dispersion) glass.
*3 When attached to EOS R (released in October 2018), at a focal length of 105 mm. Based on CIPA standards (Yaw/pitch directions)
*4 At a focal length of 105 mm. Based on CIPA standards (Yaw/pitch directions)