Canon RF 15-35mm F2.8 L IS USM vs Tamron 17-70mm f/2.8 Di III-A VC RXD
Both are Canon RF lenses. Here is what actually differs.
Pick the Canon RF 15-35mm F2.8 L IS USM if
- You want a wider view: 15mm vs 17mm at the wide end
- You shoot full frame: the Tamron 17-70mm f/2.8 Di III-A VC RXD is made for APS-C
- Our notes say it suits: Landscapes and astro, events and interiors, video
Pick the Tamron 17-70mm f/2.8 Di III-A VC RXD if
- You need more reach: 70mm vs 35mm at the long end
- You shoot video: RXD autofocus is smooth and quiet (the Canon RF 15-35mm F2.8 L IS USM uses USM)
- You shoot close-ups: it focuses down to 0.19 m vs 0.28 m
- You prefer a newer design: released 2026 vs 2019
Spec differences
12 differences| Canon RF 15-35mm F2.8 L IS USM | Tamron 17-70mm f/2.8 Di III-A VC RXD | |
|---|---|---|
| Brand |
Canon
|
Tamron
|
| Type |
Wide Zoom
|
Zoom
|
| Format |
Full frame
|
APS-C
|
| Focal length |
15-35mm
|
17-70mm
|
| Weight |
840 g
|
not listed
|
| Length |
126.8 mm
|
not listed
|
| Diameter |
88.5 mm
|
74.6 mm
slimmer
|
| Filter thread |
82 mm
|
67 mm
|
| Min focus distance |
0.28 m
|
0.19 m
closer
|
| Autofocus motor |
USM
|
RXD
|
| Weather sealing |
not listed
|
Yes
|
| Released |
2019
|
2026
|
6 identical specs hidden: mount, max aperture, max magnification, aperture blades, optical design, image stabilization. Show all
- Mount
- Canon RF both
- Max aperture
- f/2.8 both
- Max magnification
- 0.21× both
- Aperture blades
- 9 both
- Optical design
- 16 elements / 12 groups both
- Image stabilization
- Yes both
Our notes
Canon RF 15-35mm F2.8 L IS USM
A wide-angle zoom for Canon RF full-frame cameras with a constant f/2.8 aperture and image stabilization, for landscape, event and video work.
Pros
- Constant f/2.8
- Image stabilization
- Weather-sealed L build
- Sharp across the frame
Cons
- Heavy for a wide zoom (840 g)
- 82mm filter thread
- Relies on in-camera correction
Our notes
Tamron 17-70mm f/2.8 Di III-A VC RXD
More comparisons
Canon RF 15-35mm F2.8 L IS USM vs Laowa 8-15mm f/2.8 FF Zoom Fisheye
more reach (35mm) vs wider (8mm)
Canon RF 15-35mm F2.8 L IS USM vs Sigma 18-50mm f/2.8 DC DN Contemporary
wider (15mm) vs 540 g lighter
Canon RF 24-105mm F2.8 L IS USM Z vs Tamron 17-70mm f/2.8 Di III-A VC RXD
more reach (105mm) vs wider (17mm)
Canon RF 15-35mm F2.8 L IS USM vs Sigma 10-18mm f/2.8 DC DN Contemporary
more reach (35mm) vs 570 g lighter
Sigma 18-50mm f/2.8 DC DN Contemporary vs Tamron 17-70mm f/2.8 Di III-A VC RXD
0.36× magnification vs wider (17mm)
Canon RF 15-35mm F2.8 L IS USM vs Tamron 11-20mm f/2.8 Di III-A RXD
more reach (35mm) vs wider (11mm)