Tamron
17-28mm F2.8 Di III RXD
Leica L Mount
17-28mm F2.8 Di III RXD — 17–28mm f/2.8 for Leica L, a popular choice in the tamron lineup.
$799
Launch priceReleased Jun 2020
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 4.3 years newer.
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Wins
17-28mm F2.8 Di III RXD
Wins
70-180mm F2.8 Di III VC VXD G2
2 categories tied
TL;DR — Key differences
- B70-180mm F2.8 Di III VC VXD G2 has higher OIS effectiveness (5 stops vs 0 stops)
- A17-28mm F2.8 Di III RXD has lower Min focus distance (19 cm vs 38 cm)
- A17-28mm F2.8 Di III RXD has lower Weight (438 g vs 855 g)
- A17-28mm F2.8 Di III RXD has lower Length (92 mm vs 170 mm)
- B70-180mm F2.8 Di III VC VXD G2 has higher Max magnification (0.25 × vs 0.19 ×)
Key specs at a glance
Size and weight, to scale
17-28mm F2.8 Di III RXD
⌀80 × 92 mm
438 g (0.97 lb / 15.45 oz)
Credit card
85.6 × 54 mm
for scale
70-180mm F2.8 Di III VC VXD G2
⌀81 × 170 mm
855 g (1.88 lb / 30.16 oz)
17-28mm F2.8 Di III RXD is 78mm shorter and 1mm narrower than 70-180mm F2.8 Di III VC VXD G2.
17-28mm F2.8 Di III RXD is 417 g lighter than 70-180mm F2.8 Di III VC VXD G2.
Diameter (⌀) is the maximum barrel width; length is measured from the mount to the front of the lens.
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 17-28mm F2.8 Di III RXD
- ✓
Special elements
Adds 1 LD, 2 GM Aspherical
- ✓
Min focus distance
19 cm vs 38 cm — lower is better
- ✓
Weight
438 g vs 855 g — lower is better
- ✓
Length
92 mm vs 170 mm — lower is better
- ✓
Diameter
79.6 mm vs 81 mm — lower is better
Reasons to choose the 70-180mm F2.8 Di III VC VXD G2
- ✓
Special elements
Adds Aspherical
- ✓
OIS effectiveness
5 stops vs 0 stops — higher is better
- ✓
Optical stabilization
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
- ✓
Max magnification
0.25 × vs 0.19 × — higher is better
Shared specifications
Max aperture (Wide)
Both f/2.8
Max aperture (Tele)
Both f/2.8
Internal focus
Both support internal focus
Weather sealing
Both support weather sealing
Pros & cons at a glance
Editorially curated highlights and trade-offs.
17-28mm F2.8 Di III RXD
Pros
- ✓Versatile zoom range covers multiple focal lengths in one lens
- ✓Solid optical performance for the price tier
- ✓Native Leica L 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 17-28mm F2.8 Di III RXD and 70-180mm F2.8 Di III VC VXD G2 at major authorized retailers.
Tamron 17-28mm F2.8 Di III RXD
Tamron 70-180mm F2.8 Di III VC VXD G2
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.