Canon Experience Store Test, try and buy all the latest Canon digital cameras Review your product RF 24-105mm f/4-7.1 IS STM Before the Canon RF 24-105mm F4-7.1 IS STM Lens became available, the Canon EF 24-105mm f/3.5-5.6 IS STM Lens was commonly adapted for use on Canon EOS R-series cameras. In the image quality comparison , the two lenses are mostly similar, but the EF holds some advantages, including better peripheral performance at 50mm. 4dh8aN.