My clear recommendation for Canon EOS R5 Mark II: Canon RF 15-35mm f/2.8L IS USM. The reliability is very good The build quality feels premium and should last for years.

Technical highlights: The latest generation offers significantly better image quality. Very good compatibility with Canon EOS R5 Mark II features. Can be used without problems for various photography styles. Even after hours of shooting, no performance losses. Very good build quality, even at high usage.

For Canon EOS R5 Mark II I would take Sigma 14-24mm f/2.8 DG DN Art. Best choice currently.

For Canon EOS R5 Mark II I would definitely recommend Canon RF 15-35mm f/2.8L IS USM. The build quality is outstanding The performance eliminates chromatic aberration effectively.

For Canon EOS R5 Mark II I would take Sigma 14-24mm f/2.8 DG DN Art. Best choice currently.

Would definitely take Tamron 17-28mm f/2.8 Di III RXD for Canon EOS R5 Mark II. The sharpness is extremely high The image quality out of the box is very good.

> Need help with wide-angle lens choice for Canon EOS R5 Mark II. What's your recommendation? I was just reading through these and thought I should share my experience because I was in the same boat last month. I initially spent a lot of time looking at those high-end zooms, but then I had a bit of a reality check regarding my budget after buying the R5 II body. You might want to consider the Canon RF 16mm f/2.8 STM if you just need something for occasional wide shots. I bought one thinking it would be my main lens, but honestly, be careful if you do a lot of architectural stuff because the native distortion is pretty wild before the software fixes it. What I actually ended up doing for my professional gigs was picking up a used Canon EF 16-35mm f/4L IS USM and the Canon Mount Adapter EF-EOS R. It works perfectly on the new body. I would suggest this route if you want that L-series quality without the native RF price tag. Just make sure to keep the adapter permanently attached so you don't get dust on the sensor during swaps... I learned that the hard way in a windy field last week.

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My tip: Canon RF 15-35mm f/2.8L IS USM is ideal for Canon EOS R5 Mark II. The image quality is excellent The fast autofocus makes everything feel responsive and accurate.

tbh I’ve been reading a TON of technical reviews lately since I’m still kind of new to the RF system, but the community seems to LOVE a few others for the R5 II that nobody mentioned yet. - Canon RF 14-35mm f/4L IS USM - This seems like the BEST pick if you want to save weight. It’s like 300g lighter than the f/2.8 version and you get that extra 1mm on the wide end which is actually huge for architecture and tight spots.
- Canon RF 16mm f/2.8 STM - Basically a "no-brainer" because it’s so tiny? It’s not an L-series lens, but for the price, the specs are realy impressive for a lightweight walk-around lens.
- Laowa 15mm f/2 Zero-D - I keep seeing this one recommended for astro. It’s manual focus—which is kinda wierd for me to use—but the "Zero-D" means the distortion is basically gone. Has anyone tried that 14-35mm on the newer sensor yet? I’m definately curious if the corner sharpness holds up since the R5 II has SO many megapixels.

Honestly if you want the absolute pinnacle of what the RF mount can do for wide angles you HAVE to look at the Canon RF 10-20mm f/4L IS STM because it’s seriously a masterpiece of engineering and I’ve been using it on my R5 II for a few weeks now and the way it handles corner distortion is insane especially with that new peripheral coordinated control (the IBIS and lens OIS working together to stop those weird corner wobbles you get on ultra-wides). Idk why people keep suggesting adapted glass when this thing is native and so much lighter than the old EF 11-24mm. If you’re worried about the f/4 aperture just check out some side-by-side sharpness charts on The-Digital-Picture or watch Dustin Abbotts technical review (reallyyy helpful for seeing real-world flare handling) and youll see it holds up against the f/2.8 zooms easily plus you get that 10mm reach which is just woooow for interiors or landscape. It’s basically the sharpest ultra-wide I’ve ever touched and it balances perfectly on the R5 II body so definitely look into that one if you want the best possible glass for that sensor!