Lenses with a built-in focus motor can autofocus even if the camera does not have its own focus motor. Has full-time manual focus. Canon EF 50mm F/1.8 STM. Canon RF 50mm f/1.8 STM. With full-time manual focus, you can move the focus ring whilst it is in AF (autofocus) mode. Compare Canon RF 35mm f 1.8 Macro IS STM Lens vs Canon RF 24-105mm f 4-7.1 IS STM Lens vs Canon RF 14-35mm f 4 L IS USM Lens vs Canon EF 24-70mm f 2.8L II USM Lens Press ‎ ↵ Enter ‎ for Accessibility for blind people who use screen readers Compare Canon RF 24-105mm f 4 L IS USM Lens vs Canon RF 24-105mm f 4-7.1 IS STM Lens vs Canon Control Ring Mount Adapter EF-EOS R vs Canon Mount Adapter EF-EOS R has a silent focus motor built into the lens. Canon EF 500mm F/4L IS II USM. Canon RF 800mm f/11 IS STM. Lenses with built-in focus motor focus faster and more quietly than lenses without a focus motor which rely on the camera's body focus motor. minimum focus distance. Has rounded aperture blades. Canon RF 24-240mm f/4-6.3 IS USM. Sony FE 24-240mm F3.5-6.3 OSS. Similar to the number of aperture blades, rounded blades affect the way the light gets through to the sensor. Rounded blades, often only found on more expensive lenses, improve the appearance of the out-of-focus areas. Can get the RF 24-105mm f/4-7.1 IS STM for US$249.00 at USA Canon Refurbished Lens site; includes Canon 1-Year Warranty. Jon. Its sorta of your job to check that out but yes it is a 90 day warranty . Please give a source for 1 year warranty, I seemed to have missed it. I did see were they wanted money for 1 or 2 year coverage. What is the difference between Canon EF 24-105mm F4L II USM and Canon RF-S 18-150mm f/3.5-6.3 IS STM? Find out which is better and their overall performance in the camera lens ranking. Canon EF 24-105mm F/4L IS USM. vs. Canon EF 24-105mm F4L II USM. vs. 9 Canon RF 24-50mm f/4.5-6.3 IS STM. 10 Canon RF 135mm f/1.8L IS USM. 1 Tamron 17-50mm f/4 Di R1qj.