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Tamron 50-400mm f/4.5-6.3 Di III VC VXD — Prime/zoom
Tamron

Tamron 50-400mm f/4.5-6.3 Di III VC VXD

Prime/zoom

87
/ 100
From $1,299
VS
Canon RF 50mm f/1.2L USM wins by 9
Canon RF 50mm f/1.2L USM — Full-frame · 950 g · Pro portrait
Canon

Canon RF 50mm f/1.2L USM

Full-frame · 950 g · Pro portrait

96
/ 100
From $2,299
Specdex verdict

Canon RF 50mm f/1.2L 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 50mm f/1.2L USM at 96. That puts Canon RF 50mm f/1.2L 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 50mm f/1.2L USM if…

  • ✓Breathtaking bokeh
  • ✓Sharp wide open
  • ✓Weather-sealed L build
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Winner by scenario

Derived from the sub-score breakdown · not a separate test

Build

Canon RF 50mm f/1.2L USM

Compared on the build sub-score

Canon RF 50mm f/1.2L USM leads on build (98 vs 90).

Sharpness

Canon RF 50mm f/1.2L USM

Compared on the sharpness sub-score

Canon RF 50mm f/1.2L USM leads on sharpness (98 vs 87).

Autofocus

Canon RF 50mm f/1.2L USM

Compared on the autofocus sub-score

Canon RF 50mm f/1.2L USM leads on af (94 vs 83).

Value for money

Tamron 50-400mm f/4.5-6.3 Di III VC VXD

Specdex score per dollar at MSRP

Tamron 50-400mm f/4.5-6.3 Di III VC VXD more score per dollar ($1,299 vs $2,299).

Tamron 50-400mm f/4.5-6.3 Di III VC VXD 87
vs
96 Canon RF 50mm f/1.2L 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 50mm f/1.2L USM
96
sharpness 98
af 94
build 98
value 82

Specs side-by-side

Tamron 50-400mm f/4.5-6.3 Di III VC VXD versus Canon RF 50mm f/1.2L USM — full spec comparison
Spec Tamron 50-400mm f/4.5-6.3 Di III VC VXD Canon RF 50mm f/1.2L USM
Mount
—
Canon RF
Aperture
—
f/1.2
Weight
—
950 g
Filter size
—
77 mm

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 50mm f/1.2L USM

Pros
  • +Breathtaking bokeh
  • +Sharp wide open
  • +Weather-sealed L build
Cons
  • −Heavy at 950 g
  • −Expensive
  • −Breathing present

FAQ: Tamron 50-400mm f/4.5-6.3 Di III VC VXD vs Canon RF 50mm f/1.2L USM

Which is better, Tamron 50-400mm f/4.5-6.3 Di III VC VXD or Canon RF 50mm f/1.2L USM? +

Canon RF 50mm f/1.2L 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 50mm f/1.2L USM worth the price? +

At $2,299, Canon RF 50mm f/1.2L 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 50mm f/1.2L 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.

Which is better for build, Tamron 50-400mm f/4.5-6.3 Di III VC VXD or Canon RF 50mm f/1.2L USM? +

Canon RF 50mm f/1.2L USM — leads on build (98 vs 90). Compared on the build sub-score.

Which is better for sharpness, Tamron 50-400mm f/4.5-6.3 Di III VC VXD or Canon RF 50mm f/1.2L USM? +

Canon RF 50mm f/1.2L USM — leads on sharpness (98 vs 87). Compared on the sharpness sub-score.