Laowa 17mm f/4 Zero-D Shift (Canon RF) vs Tamron 17-70mm F/2.8 Di III-A VC RXD (Canon RF)
The bottom line
The Tamron 17-70mm F/2.8 Di III-A VC RXD (Canon RF) is a zoom (17-70mm) and the Laowa 17mm f/4 Zero-D Shift (Canon RF) is a 17mm prime. The zoom gives you framing flexibility from one lens; the prime trades that for a fixed focal length that's usually brighter and lighter to carry. Choose flexibility or a fast single focal length.
Choose the Laowa 17mm f/4 Zero-D Shift (Canon RF) if…
- ✓You prefer a fast, compact single focal length — a 17mm prime over a zoom.
Choose the Tamron 17-70mm F/2.8 Di III-A VC RXD (Canon RF) if…
- ✓You want more light and background blur — f/2.8 is faster than f/4, better for low light and subject separation.
- ✓You need more reach — it goes to 70mm vs 17mm for distant subjects, wildlife and sport.
- ✓You want one-lens flexibility — a 17-70mm zoom covers what the fixed 17mm can't reframe.
- ✓You shoot handheld or on an unstabilised body — it has optical stabilisation, the other doesn't.
Where they differ
- ›Aperture: the Tamron 17-70mm F/2.8 Di III-A VC RXD (Canon RF) opens to f/2.8 vs the Laowa 17mm f/4 Zero-D Shift (Canon RF)'s f/4 — more light and shallower depth-of-field.
- ›Focal range: Laowa 17mm f/4 Zero-D Shift (Canon RF) is 17mm, Tamron 17-70mm F/2.8 Di III-A VC RXD (Canon RF) is 17-70mm — different framing and reach.
- ›Type: the Tamron 17-70mm F/2.8 Di III-A VC RXD (Canon RF) is a zoom (flexible framing), the Laowa 17mm f/4 Zero-D Shift (Canon RF) a prime (one focal length, usually brighter and lighter).
- ›Price: the Tamron 17-70mm F/2.8 Di III-A VC RXD (Canon RF) is $799, $200 under the Laowa 17mm f/4 Zero-D Shift (Canon RF).
- ›Stabilisation: only the Tamron 17-70mm F/2.8 Di III-A VC RXD (Canon RF) has optical stabilisation — steadier handheld shots, especially on bodies without IBIS.
- ›Weight: the Tamron 17-70mm F/2.8 Di III-A VC RXD (Canon RF) is 525g (1.16 lb) vs 770g (1.70 lb) — you'll feel the difference handheld.
Frequently asked
Is the Laowa 17mm f/4 Zero-D Shift (Canon RF) or the Tamron 17-70mm F/2.8 Di III-A VC RXD (Canon RF) better?
The Tamron 17-70mm F/2.8 Di III-A VC RXD (Canon RF) is a zoom (17-70mm) and the Laowa 17mm f/4 Zero-D Shift (Canon RF) is a 17mm prime. The zoom gives you framing flexibility from one lens; the prime trades that for a fixed focal length that's usually brighter and lighter to carry. Choose flexibility or a fast single focal length.
Who should choose the Laowa 17mm f/4 Zero-D Shift (Canon RF)?
Choose the Laowa 17mm f/4 Zero-D Shift (Canon RF) if you prefer a fast, compact single focal length — a 17mm prime over a zoom.
Who should choose the Tamron 17-70mm F/2.8 Di III-A VC RXD (Canon RF)?
Choose the Tamron 17-70mm F/2.8 Di III-A VC RXD (Canon RF) if you want more light and background blur — f/2.8 is faster than f/4, better for low light and subject separation. Choose it if you need more reach — it goes to 70mm vs 17mm for distant subjects, wildlife and sport. Choose it if you want one-lens flexibility — a 17-70mm zoom covers what the fixed 17mm can't reframe. Choose it if you shoot handheld or on an unstabilised body — it has optical stabilisation, the other doesn't.
What is the main difference between the Laowa 17mm f/4 Zero-D Shift (Canon RF) and the Tamron 17-70mm F/2.8 Di III-A VC RXD (Canon RF)?
Aperture: the Tamron 17-70mm F/2.8 Di III-A VC RXD (Canon RF) opens to f/2.8 vs the Laowa 17mm f/4 Zero-D Shift (Canon RF)'s f/4 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 17mm | 17-70mm |
| Lens Type | Prime | Zoom |
| Optical Elements | 18 | 16 |
| Optical Groups | 12 | 12 |
| Aperture & Iris | ||
| Maximum Aperture | f/4 | f/2.8 |
| Minimum Aperture | f/22 | f/22 |
| Aperture Blades | 14 | − |
| Rounded Aperture | Yes | No |
| Coverage & Angle | ||
| Format Coverage | Full-Frame | APS-C |
| Lens Mount | Canon RF | Canon RF |
| Angle of View | 104° | 79.9° – 22.7° |
| 35mm Equivalent | − | 27-112mm |
| Focus | ||
| Autofocus | No | Yes |
| Focus Motor | Manual | RXD |
| Focus Limiter | No | No |
| AF/MF Switch | No | No |
| Min Focus Distance | 25 cm | 19 cm |
| Max Magnification | − | − |
| Stabilization & Video | ||
| Optical Stabilization | No | Yes |
| Aperture Ring | Yes | No |
| Declickable Aperture | No | No |
| Parfocal | No | No |
| Internal Zoom | No | No |
| General | ||
| Price (MSRP) | $999 | $799 |
| Filter Size | 86mm | 67mm |
| Diameter | 93mm | 74.6mm |
| Length | 110mm | 119.3mm |
| Weight | 770g (1.70 lb) | 525g (1.16 lb) |
| Weather Sealed | No | Yes |
| Tripod Collar | No | No |
