As for comparison, i’d pick up some EF lens and looked for the DXO metrics the for 24-105 F4 L IS II, 24-104 F4 (sigmas) and 24-70 F2.8: Sharpeness in the 5D mkIV body: Canons 24-105 F4 L IS II USM L IS II: 15 P-Mpix Sigmas 24-105 F4 DG OS HSM Art: 20 P-Mpix Canons 24-70 F2.8 L II USM: 21 P-Mpix. In the 7D mkII body: Autofocus. All Specs. The Canon RF 24-240mm F4-6.3 IS USM ($899) offers as much zoom power as you'll find in a full-frame lens, and manages to squeeze it into a zoom that's relatively light and At launch 2005 Canon wrote this regarding Canon EF 24-105mm F4 L IS USM : "This easy-to-use standard zoom lens can cover a large zoom area ranging from 24mm wide-angle to 105mm portrait-length telephoto, and its Image Stabilizer Technology steadies camera shake up to three stops. Constructed with one Super-UD glass element and three aspherical 24-105mm standard zoom lens with f/4 maximum aperture for Canon EOS SLR cameras 1 Super UD glass element and 3 aspherical lenses minimize chromatic aberration and distortion Ring-type USM system delivers silent but quick autofocus (AF); full-time manual focus All of the above pictures has been made with the Canon 24 105 L is USM lens and the Canon 30D camera. [do_widget Text] Official name: Canon EF 24-105 f/4 L is USM. Technical datas: Focal length: 24 – 105mm. Close focus distance: 45 cm (1.48′) Weight: 670 g (23.63 oz) Dimensions: 83 x 107 mm (3.27 x 4.2 “) Filter size: 77mm. Ultrasonic In reply to ZedDoctor • Apr 3, 2019. Suggest: 1. keep the EF 24-105 f4/L IS unless there is something wrong with it, this lens is very useful. 2. Sell the EF-M lens 18-55mm / 55-200mm and buy the EF-M 18-150mm IS STM, or may be wait until Canon releases new EF-M lense (which can be later this year or next year), nobody really knows. The Canon RF 24-105mm f/4 USM L IS does a very good job when it comes to image resolution. The sweet spot is at 24mm, where it is capable of producing a very sharp image across the entire image frame, and that's straight from f/4. There is not much in it by stopping down to f/5.6 (other than increasing the depth-of-field, of course). The Canon RF 24-105mm f/4 L IS USM lens ( Amazon , B&H) is a great and versatile general purpose lens. Great focal range and decent optics but at the expense of a smaller max. aperture (f/4) and differences in image quality throughout the focal range. The constant f/4 aperture is great for video work. Focus ring can be changed to fly-by-wire The Canon EF 24-105/4L IS USM is a very nice lens indeed. On a full frame DSLR it has an ideal focal length range for a single general purpose lens, with applications ranging from landscapes to portraits. It can be used wide open at f4 and still yield very sharp images and with the 3 stops of stabilization which the IS system provides, it's Full review. Announced just before CP+ in February 2020, the RF 24-105mm f/4-7.1 IS STM lens is the second ‘affordable’ kit lens for Canon’s full-frame R-series cameras. Like the RF 24-240mm f/4-6.3 IS USM kit lens , it has been designed to be relatively compact and lightweight kit lens as well as affordably priced. gmWg.