Tamron
11-20mm F2.8 Di III-A RXD
Sony E Mount
11-20mm F2.8 Di III-A RXD — 11–20mm f/2.8 for Sony E, a popular choice in the tamron lineup.
$899
Launch priceReleased May 2021
Tamron
17-28mm F2.8 Di III RXD
Sony E Mount
17-28mm F2.8 Di III RXD — 17–28mm f/2.8 for Sony E, a popular choice in the tamron lineup.
$899
Launch priceReleased Jun 2019
11-20mm F2.8 Di III-A RXD is 1.9 years newer.
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Wins
11-20mm F2.8 Di III-A RXD
Wins
17-28mm F2.8 Di III RXD
3 categories tied
Which would you choose?
TL;DR — Key differences
- B17-28mm F2.8 Di III RXD has lower Min focus distance (19 cm vs 38 cm)
- A11-20mm F2.8 Di III-A RXD has higher Max magnification (0.25 × vs 0.19 ×)
- A11-20mm F2.8 Di III-A RXD has lower Weight (335 g vs 420 g)
- A11-20mm F2.8 Di III-A RXD has lower Diameter (65 mm vs 73 mm)
- A11-20mm F2.8 Di III-A RXD has lower Length (97 mm vs 99 mm)
Key specs at a glance
Size and weight, to scale
📸 Snap this lens size diff to share11-20mm F2.8 Di III-A RXD
⌀65 × 97 mm
335 g (0.74 lb / 11.82 oz)
Credit card
85.6 × 54 mm
for scale
17-28mm F2.8 Di III RXD
⌀73 × 99 mm
420 g (0.93 lb / 14.82 oz)
11-20mm F2.8 Di III-A RXD is 2mm shorter and 8mm narrower than 17-28mm F2.8 Di III RXD.
11-20mm F2.8 Di III-A RXD is 85 g lighter than 17-28mm F2.8 Di III RXD.
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 11-20mm F2.8 Di III-A RXD
- ✓
Weight
335 g vs 420 g — lower is better
- ✓
Diameter
65 mm vs 73 mm — lower is better
- ✓
Max magnification
0.25 × vs 0.19 × — higher is better
- ✓
Length
97 mm vs 99 mm — lower is better
Reasons to choose the 17-28mm F2.8 Di III RXD
- ✓
Min focus distance
19 cm vs 38 cm — lower 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.
11-20mm F2.8 Di III-A RXD
Pros
- ✓Versatile zoom range covers multiple focal lengths in one lens
- ✓Weather-sealed construction for outdoor shooting
- ✓Lightweight design easy to carry all day
Cons
- –Third-party or older alternatives may offer better value
17-28mm F2.8 Di III RXD
Pros
- ✓Versatile zoom range covers multiple focal lengths in one lens
- ✓Weather-sealed construction for outdoor shooting
- ✓Native Sony E mount compatibility
Cons
- –Third-party or older alternatives may offer better value
Decided which one is right for you?
Compare live prices for the 11-20mm F2.8 Di III-A RXD and 17-28mm F2.8 Di III RXD at major authorized retailers.
Tamron 11-20mm F2.8 Di III-A RXD
Tamron 17-28mm F2.8 Di III RXD
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed July 2026.