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
28-75mm F2.8 Di III VXD G2
Sony E Mount
An incredibly popular third-party zoom updated with vastly improved sharpness and autofocus.
$899
Launch priceReleased Aug 2021
28-75mm F2.8 Di III VXD G2 is 1.1 years newer.
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Wins
17-28mm F2.8 Di III RXD
Wins
28-75mm F2.8 Di III VXD G2
3 categories tied
TL;DR — Key differences
- B28-75mm F2.8 Di III VXD G2 has higher Max magnification (0.37 × vs 0.19 ×)
- A17-28mm F2.8 Di III RXD has lower Length (92 mm vs 118 mm)
- A17-28mm F2.8 Di III RXD has lower Weight (438 g vs 540 g)
- B28-75mm F2.8 Di III VXD G2 has lower Min focus distance (18 cm vs 19 cm)
- B28-75mm F2.8 Di III VXD G2 has lower Diameter (76 mm vs 79.6 mm)
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
28-75mm F2.8 Di III VXD G2
⌀76 × 118 mm
540 g (1.19 lb / 19.05 oz)
17-28mm F2.8 Di III RXD is 26mm shorter and 4mm wider than 28-75mm F2.8 Di III VXD G2.
17-28mm F2.8 Di III RXD is 102 g lighter than 28-75mm F2.8 Di III 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
- ✓
Length
92 mm vs 118 mm — lower is better
- ✓
Weight
438 g vs 540 g — lower is better
Reasons to choose the 28-75mm F2.8 Di III VXD G2
- ✓
Special elements
Adds 2 LD, 2 GM
- ✓
Custom function button
Only 28-75mm F2.8 Di III VXD G2 supports it
- ✓
Max magnification
0.37 × vs 0.19 × — higher is better
- ✓
Min focus distance
18 cm vs 19 cm — lower is better
- ✓
Diameter
76 mm vs 79.6 mm — 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.
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
28-75mm F2.8 Di III VXD G2
Pros
- ✓Superb value for money compared to first-party options
- ✓Excellent sharpness throughout the range, even at f/2.8
- ✓Very lightweight and compact (only 540g)
- ✓Fast VXD linear motor focus drive
- ✓Customizable lens functions via Tamron Lens Utility software
Cons
- –Starts at 28mm instead of the wider 24mm standard
- –Slightly weaker corner sharpness at 75mm wide open
- –Weather sealing is basic compared to Sony GM lenses
Decided which one is right for you?
Compare live prices for the 17-28mm F2.8 Di III RXD and 28-75mm F2.8 Di III VXD G2 at major authorized retailers.
Tamron 17-28mm F2.8 Di III RXD
Tamron 28-75mm F2.8 Di III VXD G2
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.