Maybe you’re upgrading from the Canon R6 or R6 Mark II to the Canon R6 Mark III. Or maybe you’re new to Canon—or even digital photography—and you’re starting with the R6 Mark III.  Either way, you’re probably asking the same question: what’s the best lens for my camera?

“Best” is subjective, so I’ll define it this way: the lens that delivers excellent image quality while being useful in the widest range of real-world shooting situations. By that definition, there’s only one answer – the RF 24-70 f2.8.  If I could only have one lens on my R6 Mark III— or my R5 Mark II – this would be it. The inclusion of the R5 Mark II here is intentional. This is arguably the best all-around lens Canon makes for any full-frame RF camera.

DOES NEARLY EVERYTHING

Travel. Product. Portrait. Weddings. Automotive. Landscape. Street. Indoor. Outdoor. You can cover an enormous range of photographic situations with the RF 24-70 f2.8 — and do so at a very high level. The focal range alone makes it adaptable, but what really sets it apart is how usable every part of that range is. At 24mm it’s wide enough for environmental shots and travel work, while 70mm gives you flattering compression for portraits and detail work without forcing you into a prime.

Like most L-series RF lenses, it isn’t light—but it earns its place in my bag. It’s the lens I travel with most often and my preferred walk-around option, especially when I don’t know what I’m going to encounter. The combination of focal length flexibility and a constant f2.8 aperture means I’m rarely limited by light or subject matter. Indoors, that extra light-gathering capability matters far more than people expect, and outdoors it gives you subject separation that elevates images beyond what slower zooms can deliver.

Autofocus is fast and reliable, particularly on bodies like the R6 Mark III and R5 Mark II, and it works just as well when you want to slow down and take manual control. In short, versatility and image quality are the defining traits here. This is the lens that lets you focus on the photograph instead of the gear.

WHO THIS LENS IS NOT FOR

That said, the RF 24-70 f2.8 isn’t designed for everything. If your primary focus is sports, wildlife, or birds, you’ll quickly run out of reach. And if you routinely shoot at extreme telephoto distances, a longer, more specialized lens will make more sense.  It also isn’t the lens I’d choose for dedicated astrophotography. While it’s certainly capable, most astro shooters will be better served by a faster prime with stronger wide-open performance and better coma control.

WHAT ABOUT THE CANON RF 28-70 f2.0?

You may be wondering why my pick for an “if I could only have one lens” isn’t the Canon RF 28–70mm f2.0. I’ve shot with both lenses (you can read my full review of the RF 28–70mm f2.0 here), and while the 24–70mm f/2.8 isn’t exactly light, it’s significantly smaller and lighter than the 28–70. In many ways, the 28–70 is the more specialized, “pro” version of the 24–70 — essentially three fast primes in a single zoom, which is why it’s a wedding photographer’s dream. But that specialization comes with tradeoffs: more size, more weight, less focal range on the wide end, and a much higher price. The Canon RF 28–70mm f2.0 is a fantastic lens, but as a true walk-around, do-everything option, it’s harder to live with. If I could only have one lens, it wouldn’t be this one.

THE BUDGET ALTERNATIVE

If your budget is tight—understandable after purchasing an expensive camera body like the R6 Mark III or R5 Mark II—you may be considering the Canon RF 24–105mm f4. It’s less expensive than the 24–70, similar in size and weight, and offers more reach on the long end. I’ve owned both lenses, and while the 24–105 is perfectly fine, it lacks the “pro” character of the 24–70. The images it produces are acceptable, but the 24–70 delivers a level of subject separation, low-light performance, and overall image quality you simply don’t get with the f/4 zoom. The extra two stops of light from the f/2.8 aperture make a real difference indoors, and in practice, that added versatility outweighs the extra reach of the 24–105. That said, if the RF 24-70 f2.8 isn’t in the budget right now, grab a pre-owned Canon RF 24–105mm f4 and continue to save your money. When you’re ready to upgrade, you won’t lose much selling it to help fund the 24–70.

SAMPLE IMAGES

Here are some examples of images taken with the RF 24-70 f2.8:

RF 24-70 f2.8 @f11/35mm – perfect product shot lens

RF 24-70 f2.8 @f6.3/24mm – great landscape lens

Some of my best car photos were taken with the RF 24-70 f2.8

THE MAIN PILLAR OF THE CANON HOLY TRINITY

The RF 24-70 f2.8 is more than just one third of Canon’s “holy trinity” of camera lenses (with the RF 15–35mm f/2.8 and RF 70–200mm f/2.8 rounding out the set). Together, these three lenses will cover roughly 90–95% of most photographers’ needs. In practice, though, the 24–70 does the bulk of the work, accounting for at least 70–75% of that coverage.

If you’re building a Canon RF kit from scratch, this is the lens everything else should be built around.  And if we’re ever stuck on a desert island with only one Canon lens allowed, you bring the coconuts—I’ll bring the RF 24-70 f2.8

Here’s my video on the RF 24-70 f2.8: