Tamron
Tamron 50-400mm f/4.5-6.3 Di III VC VXD
Prime/zoom
87
/ 100
From $1,299
VS
Canon RF 28-70mm f/2L USM wins by 9
Canon
Canon RF 28-70mm f/2L USM
Prime/Zoom
96
/ 100
From $2,999
Specdex verdict
Canon RF 28-70mm f/2L USM takes it — here’s why.
In our weighted Specdex score, Tamron 50-400mm f/4.5-6.3 Di III VC VXD lands at 87 and Canon RF 28-70mm f/2L USM at 96. That puts Canon RF 28-70mm f/2L USM ahead by 9 points — a decisive margin driven mostly by its strengths in the categories below.
Pick Tamron 50-400mm f/4.5-6.3 Di III VC VXD if…
- ✓Proven optical formula
- ✓Weather-sealing (L/GM/S)
- ✓Strong resale
Pick Canon RF 28-70mm f/2L USM if…
- ✓Fast autofocus
- ✓Weather-sealed
- ✓Premium optics
Tamron 50-400mm f/4.5-6.3 Di III VC VXD 87
vs 96 Canon RF 28-70mm f/2L USM
Score breakdown
Tamron 50-400mm f/4.5-6.3 Di III VC VXD
87 sharpness 87
af 83
build 90
value 86
Canon RF 28-70mm f/2L USM
96 sharpness 96
af 95
build 94
value 84
Specs side-by-side
| Spec | Tamron 50-400mm f/4.5-6.3 Di III VC VXD | Canon RF 28-70mm f/2L USM |
|---|
Tamron 50-400mm f/4.5-6.3 Di III VC VXD
Pros
- +Proven optical formula
- +Weather-sealing (L/GM/S)
- +Strong resale
Cons
- −Mount-specific
- −Older AF motor on some
- −Heavier than modern counterparts
Canon RF 28-70mm f/2L USM
Pros
- +Fast autofocus
- +Weather-sealed
- +Premium optics
Cons
- −Heavy
- −Expensive
- −Focus breathing varies
FAQ: Tamron 50-400mm f/4.5-6.3 Di III VC VXD vs Canon RF 28-70mm f/2L USM
Which is better, Tamron 50-400mm f/4.5-6.3 Di III VC VXD or Canon RF 28-70mm f/2L USM? +
Canon RF 28-70mm f/2L USM scores 96 on our weighted rubric — ahead by 9. Your best pick depends on the sub-scores above.
Is Tamron 50-400mm f/4.5-6.3 Di III VC VXD worth the price? +
At $1,299, Tamron 50-400mm f/4.5-6.3 Di III VC VXD delivers a Specdex score of 87 — strongest in build.
Is Canon RF 28-70mm f/2L USM worth the price? +
At $2,999, Canon RF 28-70mm f/2L USM delivers a Specdex score of 96 — strongest in sharpness.
Does Tamron 50-400mm f/4.5-6.3 Di III VC VXD or Canon RF 28-70mm f/2L USM last longer? +
Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.