Have Canon RF 24-105mm f/4L IS USM for Canon EOS R1 in use. Works perfectly.

For Canon EOS R1 I would also check the autofocus performance. Do you need fast AF for action shots?

My experience: Tamron 28-75mm f/2.8 Di III VXD G2 is perfect for Canon EOS R1. The reliability is very good The ergonomic design allows for comfortable handling.

My tip: Canon RF 24-240mm f/4-6.3 IS USM for Canon EOS R1. Very satisfied with it.

Have you thought about the brand? For Canon EOS R1 different brands have advantages.

So I’ve been doing a lot of digging through community reviews lately because I’m always super cautious about spending a ton of money on glass that might not actually fit my workflow. Tbh, I was really worried about the weight of the f/2.8 lenses for a long trip, especially with a body like the R1. I ended up looking into the f/4 "travel" series instead to keep things more manageable. Here’s what I’ve been comparing based on the community feedback I found: * Canon RF 14-35mm f/4L IS USM: This seems like the safest bet for those wide travel shots. Most people in the groups say the edge-to-edge sharpness is solid, and I really value the weather sealing. I'm always kinda scared of a sudden downpour ruining the electronics, so the 'L' build gives me peace of mind.
* Canon RF 70-200mm f/4L IS USM: I was looking at this for a bit more reach. It’s basically the size of a soda can, which is wild. The community reviews mention it's super reliable for candid street stuff without being too flashy. I mean, I’m still sort of an intermediate user so I might be overthinking it, but I’d rather play it safe with lightweight, sealed gear than struggle with a heavy kit all day.

For Canon EOS R1 I would take Canon RF 24-105mm f/4L IS USM without hesitation. The weight is manageable and comfortable The fast autofocus makes everything feel responsive and accurate.

Long-term experience: Using Canon RF 24-105mm f/4L IS USM for about a year and am thrilled. Have researched for a long time and this lens was the best choice. The image quality clearly exceeds my expectations. Very good price-performance ratio, can only recommend further.

I spent a few weeks trekking through the Swiss Alps last year and learned the hard way that weight matters, even when you have a flagship body. The R1 is built like a tank, so pairing it with lighter but high-perf glass is the way to go for travel. I switched to these two and never looked back:

• Canon RF 14-35mm f/4L IS USM
• Weighs just 540g. That extra reach to 14mm is a game changer for tight streets or mountain vistas. The 5.5 stops of IS (goes up to 7 with the R1 IBIS) makes handheld shots at dusk super easy.
• Canon RF 70-200mm f/4L IS USM
• It is roughly the same size as a standard zoom when it is stowed away. I found the sharpness stays consistent throughout the zoom range, and the 0.6m minimum focus distance is actually really useful for detail shots. Tbh the f/4 aperture is fine since the R1 has such incredible high ISO performance. I rarely felt like I was missing out on the extra stop of light from the heavier 2.8 versions... plus it saves a ton of space in the bag. Its definitely worth looking into the f/4 line if you want to stay mobile.

Honestly if ur lugging around an R1 you probably want to save some weight elsewhere while keeping the image quality up. I mean, that body is already a total brick haha. For my last few trips I actually ditched the heavy L zooms and went with a super practical prime and a light tele setup. It works surprisingly well for real-world shooting that you can just walk around with.

• Canon RF 35mm f/1.8 Macro IS STM
• Perfect for street and food shots, plus the macro is super handy for details.
• Canon RF 100-400mm f/5.6-8 IS USM
• This thing is crazy light for the massive reach it gives you. Tbh the autofocus on the R1 makes even these non-L lenses feel like pro glass. It is a solid way to keep ur kit manageable without breaking the bank after spending so much on the body lol. Who wants to carry a 10lb bag all day anyway?

Finally someone says it. Ive been thinking this for a while but wasnt sure.