The Tamron 17-70mm F/2.8 Di III-A VC RXD is a standard zoom lens for APS-C mirrorless cameras with a Canon RF mount, designed for versatile everyday use ranging from wide-angle to medium telephoto, with a Full-frame equivalent focal length of 27.2–112 mm. It maintains a constant maximum aperture of f/2.8 across the entire focal length range, ensuring consistent image quality even in less-than-ideal lighting conditions. The optical design consists of 16 elements in 12 groups, featuring LD and GM elements for high resolution from the center to the edges of the frame. The RXD focusing system ensures fast and quiet Autofocus, with focus breathing suppression that is also useful for video. The built-in VC stabilization compensates for vibrations in both photos and videos, while the minimum focusing distance of 0.19 m in wide-angle mode allows for close-up shots with a maximum magnification ratio of 1:4.8. The Canon RF version features dedicated AF/MF and VC ON/OFF switches, as well as support for firmware updates via Tamron Lens Utility. Rounding out the package is a moisture-resistant construction with a Fluorine treatment on the front panel. A lens designed for photographers and Videomakers looking for a single, versatile zoom lens for travel, still photography, and video content on a Canon APS-C camera body.