Tamron
18-300mm F3.5-6.3 Di III-A VC
Sony E Mount
18-300mm F3.5-6.3 Di III-A VC — 18–300mm f/3.5-6.3 for Sony E, a popular choice in the tamron lineup.
$699
Launch priceReleased Oct 2021
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
18-300mm F3.5-6.3 Di III-A VC is 3 months newer.
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Wins
18-300mm F3.5-6.3 Di III-A VC
Wins
28-75mm F2.8 Di III VXD G2
TL;DR — Key differences
- A18-300mm F3.5-6.3 Di III-A VC has higher OIS effectiveness (5 stops vs 0 stops)
- B28-75mm F2.8 Di III VXD G2 has lower Max aperture (Tele) (f/2.8 vs f/6.3)
- B28-75mm F2.8 Di III VXD G2 has lower Min focus distance (18 cm vs 38 cm)
- B28-75mm F2.8 Di III VXD G2 has higher Max magnification (0.37 × vs 0.25 ×)
- B28-75mm F2.8 Di III VXD G2 has lower Max aperture (Wide) (f/2.8 vs f/3.5)
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 18-300mm F3.5-6.3 Di III-A VC
- ✓
Special elements
Adds Aspherical
- ✓
OIS effectiveness
5 stops vs 0 stops — higher is better
- ✓
Optical stabilization
Only 18-300mm F3.5-6.3 Di III-A VC supports it
- ✓
Diameter
65 mm vs 76 mm — lower is better
Reasons to choose the 28-75mm F2.8 Di III VXD G2
- ✓
Special elements
Adds 2 LD, 2 GM
- ✓
Max aperture (Tele)
f/2.8 vs f/6.3 — lower is better
- ✓
Min focus distance
18 cm vs 38 cm — lower is better
- ✓
Weather sealing
Only 28-75mm F2.8 Di III VXD G2 supports it
- ✓
Custom function button
Only 28-75mm F2.8 Di III VXD G2 supports it
- ✓
Max aperture (Wide)
f/2.8 vs f/3.5 — lower is better
- ✓
Length
118 mm vs 137 mm — lower is better
- ✓
Weight
540 g vs 620 g — lower is better
Shared specifications
Internal focus
Both support internal focus
Pros & cons at a glance
Editorially curated highlights and trade-offs.
18-300mm F3.5-6.3 Di III-A VC
Pros
- ✓Versatile zoom range covers multiple focal lengths in one lens
- ✓Built-in optical image stabilization
- ✓Native Sony E 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 18-300mm F3.5-6.3 Di III-A VC and 28-75mm F2.8 Di III VXD G2 at major authorized retailers.
Tamron 18-300mm F3.5-6.3 Di III-A VC
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 May 2026.