Though the Canon RF 28-70mm f2 L USM is a monster lens, it’s arguably the best full-frame zoom on the market.
When I first laid eyes on the Canon RF 28-70mm f2 L USM, I wrote it off in my head. It’s a monster in size, but when use it for a long time, you begin to realize that it’s manageable. There is no image stabilization, and that will be a problem for many newer photographers. However, the lens has a lot of strengths. Besides being built like Brock Lesner in his prime, it has some of the best sharpness we’ve ever seen from a zoom. Couple this with the f2 aperture throughout the entire range, and you’ve got something unique in the market. This is part of what Canon is doing to survive, and though everyone gives Canon a lot of grief for recycling older camera sensors, I believe their lenses are the best on the market. Of course, this is reflected in the price.
Editor’s Note: You’re probably wondering why this review is so late. It would have been published four months ago if it weren’t for a hard drive that crashed and delayed a lot of our reviews. The Canon 28-70mm f2 L USM is one of those products. We should also be transparent in saying that Canon paid for a sponsored post about the lens a while back. Some of the images in this review were shot for that post. But, we still are maintaining our 100% editorial integrity with this full review.
Pros and Cons
Pros
Beautiful image quality
Very sharp
The fastest full-frame zoom lens with a practical range on the market
Weather sealing
Built incredibly well
It got even better with the latest firmware update
Cons
It’s large
It’s heavy
It’s just under $3,000
Gear Used
We tested the Canon RF 28-70mm f2 L USM with the:
Canon EOS R
Profoto B10
Canon RF 28-70mm F2 L USM Tech Specs
Specs are taken from the Adorama Listing:
Bright, Constant f/2.0 Zoom Lens
L-series Lens with High Image Quality
Control Ring for Direct Setting Changes
12 pin Communication System
Dust- and Water-resistant with Fluorine Coating
Air Sphere Coating (ASC) Minimizes Lens Flare and Ghosting
Two UD Elements and One Super UD Element
Lens Mount: Lens Mount: Canon EOS RF
Fixed Mirrorless FL: Focal Length: All Zooms
Mirrorless: Zoom: Focal Length: 28-70mm
Lens Format: Lens Format: Full-Frame
Maximum Aperture: Maximum Aperture: f/2
Lens Type: Wide Angle To Standard Zoom Lens
Special Features: Weather Resistant
Image Stabilization: Image Stabilization: No
Filter Size: Focal Length: 95mm
Ergonomics
The Canon RF 28-70mm f2 L USM has a massive 95mm filter thread on the front. It’s the largest I’ve seen in a long time. But when you have innovation like this, it’s understandable.
With the Canon 28-70mm f2 L USM, you get a lens with three rings. At the front, near the trademarked Canon Red L ring, is the multi-function ring. I set this to aperture control. Behind that is the focusing ring. And all the way toward the back is the zoom ring.
On the left side is an AF/MF switch. On the opposite side is the zoom lock. It only locks at 24mm, though I wish it locked at various focal lengths.
The Canon 28-70mm f2 L USM is already a big lens. But we’re glad to note that when zoomed in, it doesn’t get that much larger at all. That’s nice!
Build Quality
During our testing, we took the Canon RF 28-70mm f2 L USM into the rain more than a few times. It survived; we were able to return the lens back to Canon in perfectly working condition. Canon has weather-sealed this lens quite well. Photographers who bring it out into sandy conditions and even the rain won’t have any issues with the Canon RF 28-70mm f2 L USM’s build quality. To that end, it means that if you’re photographing a party and someone spills beer or wine on the lens, you theoretically should be okay (but, I’d still exercise caution).
Considering how mammoth this lens is, it undoubtedly had better be weather sealed. If I didn’t mention it enough, the Canon 28-70mm f2 L USM is big. It eventually grew on me, but when I then pick up my Sony cameras and Fujifilm cameras with their...