Canon_Guy wrote: I had EF 24-105/4 mk I for about 5 years. Now I have RF 24-105/4 for more than a year. From my point of view there are ups and downs for both the lenses. None of them is a clear winner from the objective point of view. And either of them can be a clear winner based on what is important for its owner. Read our in-depth Canon RF 85mm f/1.2L USM review (Image credit: Canon) Macro lens: Canon RF 85mm f/2 Macro IS STM Read our in-depth Canon RF 24-240mm F4-6.3 IS USM review (Image credit: Canon) Reviews Canon RF 24-105mm f/4 L IS USM review This surprisingly sharp kit lens punches well above its aperture and pairs perfectly with the Canon EOS R By James Artaius last updated 4 October 2022 Digital Camera World Verdict Best Buy has honest and unbiased customer reviews for Canon - RF24-105mm F2.8 L IS USM Z Standard Zoom Lens for EOS R-Series Cameras - Black. Canon - RF-S10-18mm My RF 24-105 f4 is excellent. No issues. I remember in years past there would often be posts about copy variation with lenses. But today I don't hear about it much. Maybe lens manufacturing has better quality control today. In recent years I have bought the EF 100-400, RF 24-105 f4, RF 100-500, RF 35 f1.4, and they all were excellent. In terms of image quality, the RF 24-105 F4 L is arguably the best zoom available with this zoom range. The Sony 24-105 F4 is close and may be better in some respects. The Nikon F-mount equivalent is not close though there is a Z-mount 24-105 on Nikon's roadmap that is likely to be very good when it is eventually released. 1. I just had my Rf 24-105 f4 in for repair of a scratch on the lens. The original estimate for the repair was $556.83 with my CPS discount. I bought a Canon CarePak Plus when I bought my R5 and Rf 24-105 f4. Below is my original estimate. Canon Repair estimate without the CarePak+. Canon EOS R5 Canon RF 24-105mm F4L IS USM Canon RF 70-200 F4 L Canon EF 50mm F1.4 USM Canon EF-S 24mm F2.8 STM +2 more Reply Reply with quote Reply to thread Complain I have an old Crumpler 4 Million Dollar Home bag and it's perfect for this pourpose. I fit my R6 with RF 24-105 f4L attached and I have room for my RF 50 1.8 and RF 16 2.8. FIts perfect and small. They don't make these any more but of you can find a bag with similar/same dimensions, you should be all set. Dimensions are: 10.6 x 8.5 x 4.6" If you have the EF 24-105 II and are potentially interested in an RF 24-70F2.8, I would suggest just using the EF on the R for a while. Improvement in IQ by moving to the RF is there, but I think you will find that it is more incremental than game-changing; functionally, EF lenses work perfectly on the R, especially if you invest in the control ring adapter. 1hEMh5x.