Compare Canon RF 24-105mm f 4 L IS USM Lens vs Sony FE 24-105mm f 4 G OSS Lens vs Canon EF 24-105mm f 4L IS II USM Lens Weight . 1.54 lb / 700 g . 1.46 lb / 663 g I agree with @Waddizzle. If your moving to Full Frame this would be a better choice compared to the EF-S 18-135mm. You'll be able to use the Full image circle of the lens compared to being restricted by the APS-C image circle of the 18-135mm lens. When being used on a Full Frame R Series camera. Whe Canon EF 85mm f/1.4 L IS USM. Canon EF 100mm f/2.8L IS USM. SIGMA 40mm F1.4 DG HSM A018. SIGMA 50mm F1.4 DG HSM A014. SIGMA 70mm F2.8 DG MACRO A018. SIGMA 85mm F1.4 DG HSM A016. SIGMA 105mm F1.4 DG HSM A018. TAMRON SP 35mm F/1.8 Di VC USD F012. TAMRON SP 45mm F/1.8 Di VC USD F013. TAMRON SP 85mm F/1.8 Di VC USD F016. Canon EF 70-300mm f/4-5.6L Featuring a zoom range of 24-105mm and a constant f/4 aperture, the EF 24-105mm f/4L IS II USM is ideal for landscapes, portraits, sports and more, offering effective all-day performance for advanced photography and videography. It helps reduce ghosting and flare, and has improved peripheral brightness as well as a 10-blade circular aperture These Canon lens filter size charts list the lens diameters for Canon RF, EF, EF-M, and EF-S lenses. EF 24-105mm f/4L IS II USM: 77mm: Polarizer | UV/Haze | ND The EF 24 to 70 F/4L IS USM is generally a tad sharper than either of the 24 to 105 lenses mentioned. Both 24 to 105's have extra reach. Cons: The EF 24 to 105 F/4L IS USM is prone to zoom turret slippage. Lens Hoods are next to useless in all three. Both the 24 to 105's suffer from a tad more Veiling Flare than the 24 to 70 WW fPWuD.