Skip to content
Specdex
Compare now
Tamron 20-40mm f/2.8 Di III VXD — Prime/zoom
Tamron

Tamron 20-40mm f/2.8 Di III VXD

Prime/zoom

85
/ 100
From $699
VS
Nikon Z 180-600mm f/5.6-6.3 VR wins by 5
Nikon Z 180-600mm f/5.6-6.3 VR — Prime/Zoom
Nikon

Nikon Z 180-600mm f/5.6-6.3 VR

Prime/Zoom

90
/ 100
From $1,699
Specdex verdict

Nikon Z 180-600mm f/5.6-6.3 VR takes it — here’s why.

In our weighted Specdex score, Tamron 20-40mm f/2.8 Di III VXD lands at 85 and Nikon Z 180-600mm f/5.6-6.3 VR at 90. That puts Nikon Z 180-600mm f/5.6-6.3 VR ahead by 5 points — a decisive margin driven mostly by its strengths in the categories below.

Pick Tamron 20-40mm f/2.8 Di III VXD if…

  • ✓Proven optical formula
  • ✓Weather-sealing (L/GM/S)
  • ✓Strong resale

Pick Nikon Z 180-600mm f/5.6-6.3 VR if…

  • ✓Fast autofocus
  • ✓Weather-sealed
  • ✓Premium optics
Share this comparison: Share to Reddit X / Twitter

Winner by scenario

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

Build

Nikon Z 180-600mm f/5.6-6.3 VR

Compared on the build sub-score

Nikon Z 180-600mm f/5.6-6.3 VR leads on build (94 vs 90).

Sharpness

Nikon Z 180-600mm f/5.6-6.3 VR

Compared on the sharpness sub-score

Nikon Z 180-600mm f/5.6-6.3 VR leads on sharpness (90 vs 85).

Autofocus

Nikon Z 180-600mm f/5.6-6.3 VR

Compared on the autofocus sub-score

Nikon Z 180-600mm f/5.6-6.3 VR leads on af (89 vs 81).

Value for money

Tamron 20-40mm f/2.8 Di III VXD

Specdex score per dollar at MSRP

Tamron 20-40mm f/2.8 Di III VXD more score per dollar ($699 vs $1,699).

Tamron 20-40mm f/2.8 Di III VXD 85
vs
90 Nikon Z 180-600mm f/5.6-6.3 VR

Score breakdown

Tamron 20-40mm f/2.8 Di III VXD
85
sharpness 85
af 81
build 90
value 86
Nikon Z 180-600mm f/5.6-6.3 VR
90
sharpness 90
af 89
build 94
value 84

Specs side-by-side

Tamron 20-40mm f/2.8 Di III VXD versus Nikon Z 180-600mm f/5.6-6.3 VR — full spec comparison
Spec Tamron 20-40mm f/2.8 Di III VXD Nikon Z 180-600mm f/5.6-6.3 VR

Tamron 20-40mm f/2.8 Di III VXD

Pros
  • +Proven optical formula
  • +Weather-sealing (L/GM/S)
  • +Strong resale
Cons
  • −Mount-specific
  • −Older AF motor on some
  • −Heavier than modern counterparts

Nikon Z 180-600mm f/5.6-6.3 VR

Pros
  • +Fast autofocus
  • +Weather-sealed
  • +Premium optics
Cons
  • −Heavy
  • −Expensive
  • −Focus breathing varies

FAQ: Tamron 20-40mm f/2.8 Di III VXD vs Nikon Z 180-600mm f/5.6-6.3 VR

Which is better, Tamron 20-40mm f/2.8 Di III VXD or Nikon Z 180-600mm f/5.6-6.3 VR? +

Nikon Z 180-600mm f/5.6-6.3 VR scores 90 on our weighted rubric — ahead by 5. Your best pick depends on the sub-scores above.

Is Tamron 20-40mm f/2.8 Di III VXD worth the price? +

At $699, Tamron 20-40mm f/2.8 Di III VXD delivers a Specdex score of 85 — strongest in build.

Is Nikon Z 180-600mm f/5.6-6.3 VR worth the price? +

At $1,699, Nikon Z 180-600mm f/5.6-6.3 VR delivers a Specdex score of 90 — strongest in build.

Does Tamron 20-40mm f/2.8 Di III VXD or Nikon Z 180-600mm f/5.6-6.3 VR 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 20-40mm f/2.8 Di III VXD or Nikon Z 180-600mm f/5.6-6.3 VR? +

Nikon Z 180-600mm f/5.6-6.3 VR — leads on build (94 vs 90). Compared on the build sub-score.

Which is better for sharpness, Tamron 20-40mm f/2.8 Di III VXD or Nikon Z 180-600mm f/5.6-6.3 VR? +

Nikon Z 180-600mm f/5.6-6.3 VR — leads on sharpness (90 vs 85). Compared on the sharpness sub-score.