The new Canon RF 10-20mm F4L IS STM is the full-frame Canon EOS R mirrorless lens successor to Far from just a quick mirrorless update, the Canon RF 10-20mm F4L IS STM makes full use of the RF mount – which opens up a whole realm of innovation in optical engineering. Indeed, this is the world’s first rectilinear zoom lens with a 10mm focal length and autofocus – making it, on paper at least, one of the best ultra-wide-angle lenses for those who like to shoot at the extreme end.
