Tamron
20-40mm F2.8 Di III VXD
Sony E Mount
20-40mm F2.8 Di III VXD — 20–40mm f/2.8 for Sony E, a popular choice in the tamron lineup.
$699
Launch priceReleased Oct 2022
Tamron
70-180mm F2.8 Di III VC VXD G2
Sony E Mount
70-180mm F2.8 Di III VC VXD G2 — 70–180mm f/2.8 for Sony E, a popular choice in the tamron lineup.
$1,299
Launch priceReleased Oct 2024
70-180mm F2.8 Di III VC VXD G2 is 2 years newer.
Affiliate disclosure: As an Amazon Associate, Cameraegg earns from qualifying purchases. Cameraegg may also earn commission from B&H links, at no extra cost to you.
Wins
20-40mm F2.8 Di III VXD
Wins
70-180mm F2.8 Di III VC VXD G2
4 categories tied
TL;DR — Key differences
- B70-180mm F2.8 Di III VC VXD G2 has higher OIS effectiveness (5 stops vs 0 stops)
- A20-40mm F2.8 Di III VXD has lower Weight (365 g vs 855 g)
- A20-40mm F2.8 Di III VXD has lower Length (101 mm vs 170 mm)
- B70-180mm F2.8 Di III VC VXD G2 has lower Diameter (81 mm vs 86 mm)
Key specs at a glance
Use-case scoring
Which one for what?
Algorithmic scores from verified specs · 10 = best in class
Why pick one over the other
Reasons to choose the 20-40mm F2.8 Di III VXD
- ✓
Weight
365 g vs 855 g — lower is better
- ✓
Length
101 mm vs 170 mm — lower is better
Reasons to choose the 70-180mm F2.8 Di III VC VXD G2
- ✓
OIS effectiveness
5 stops vs 0 stops — higher is better
- ✓
Optical stabilization
Only 70-180mm F2.8 Di III VC VXD G2 supports it
- ✓
Weather sealing
Only 70-180mm F2.8 Di III VC VXD G2 supports it
- ✓
Control ring
Only 70-180mm F2.8 Di III VC VXD G2 supports it
- ✓
Custom function button
Only 70-180mm F2.8 Di III VC VXD G2 supports it
- ✓
Diameter
81 mm vs 86 mm — lower is better
Shared specifications
Max aperture (Wide)
Both f/2.8
Max aperture (Tele)
Both f/2.8
Min focus distance
Both 38 cm
Max magnification
Both 0.25 ×
Internal focus
Both support internal focus
Pros & cons at a glance
Editorially curated highlights and trade-offs.
20-40mm F2.8 Di III VXD
Pros
- ✓Versatile zoom range covers multiple focal lengths in one lens
- ✓Lightweight design easy to carry all day
- ✓Native Sony E mount compatibility
Cons
- –Third-party or older alternatives may offer better value
70-180mm F2.8 Di III VC VXD G2
Pros
- ✓Versatile zoom range covers multiple focal lengths in one lens
- ✓Built-in optical image stabilization
- ✓Weather-sealed construction for outdoor shooting
Cons
- –Third-party or older alternatives may offer better value
Decided which one is right for you?
Compare live prices for the 20-40mm F2.8 Di III VXD and 70-180mm F2.8 Di III VC VXD G2 at major authorized retailers.
Tamron 20-40mm F2.8 Di III VXD
Tamron 70-180mm F2.8 Di III VC VXD G2
Affiliate disclosure: As an Amazon Associate, Cameraegg earns from qualifying purchases. Cameraegg may also earn commission from B&H links, at no extra cost to you.
Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.