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

The Sigma 24-105mm F4 DG OS HSM lens is a great value for full-frame shooters who aren't in need of an f/2.8 zoom. Canon EF 24-70mm f/4L IS USM. $999.00 at Amazon See It Read Our Canon EF 24

RF24-105mm F4 L IS USM. ・ガラスモールド非球面レンズ3枚、UD ※1 レンズ1枚の特殊光学材料を含む14群18枚の光学設計により、高画質と光学系の小型化を両立。. 各種収差を低減。. ・特殊コーティング「ASC（Air Sphere Coating）」の採用により、レンズ面に対して垂直

The RF 14-35mm F4 takes up less room in your bag than the other wide zoom for Canon's EOS R system; the 15-35mm F2.8 measures 5.0 by 3.5 inches and weighs 1.9 pounds.Major third-party lens

EF lenses have the reputation to work well adapted to R bodies. RF lenses seem to be a bit better and lighter than their adapter RF ciblings, though. On the other hand the 55-250 has an excellent reputation and starts out at F4, as the EF 24-105. So you would not loose much light, compared to the EF.

Canon EF-S 17-85mm f/4-5.6 IS USM Lens: 1.15' (0.35m) 0.2x: 0.43 - 0.14x: 0.72 - 0.33x: Canon EF 24-70mm f/2.8L USM Lens: 1.25' (0.38m) 0.29x: 0.63 - 0.18x: 1.25 - 0.40x: Canon EF 24-105mm f/4.0L IS USM Lens: 1.48' (0.45m) 0.23x: 0.60 - 0.40x: n/c - 0.61x: Canon EF 28-135mm f/3.5-5.6 IS USM Lens: 1.64' (0.50m) 0.19x: 0.53 - 0.09x: 1.09 - 0.21x fPeh. 429 43 297 69 351 355 154 220 169

canon ef 24 105mm f4 is usm