The lens also utilizes a ring-type NANO USM autofocus motor for achieving fast and accurate yet smooth and noiseless focusing in both photo and video modes. The RF 24/105mm f/4L IS USM features the L-series dust, moisture, and weather-resistant lens body, and is specifically designed for use with Canon’s full-frame EOS R mirrorless camera. Key Features EF 24-105mm Standard Zoom Lens f/4L IS USM L for Exceptional The L series of Canon camera lenses is Canon's flagship professional lens range. These Canon EF lenses represent the best in precision designed EF optics and are dust and moisture resistant. Reviews. Smartphones; Camera Sensors; Camera Lenses Canon EF 24-105mm f/4L IS II USM on Canon EOS 5DS R vs Canon EF 24-70mm f/2.8L II USM on Canon EOS 5DS R vs Canon EF 24-105mm f/3.5-5.6 IS STM Review Canon EF-S 24mm f/2.8 STM Lens Review Canon EF 85mm f/1.4L IS USM Review Canon RF 85mm F2 IS STM Review Canon RF 85mm F1 Re: EF 28-135mm f/3.5-5.6 IS USM vs. EF 24-105mm f/4L IS USM In reply to Loren Charif • Apr 17, 2011 Agree, if money is no issue go fro the 24-105L. 5tf3g.