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
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
18-300mm F3.5-6.3 Di III-A VC is 2.3 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
17-28mm F2.8 Di III RXD
Wins
18-300mm F3.5-6.3 Di III-A VC
2 categories tied
TL;DR — Key differences
- B18-300mm F3.5-6.3 Di III-A VC has higher OIS effectiveness (5 stops vs 0 stops)
- A17-28mm F2.8 Di III RXD has lower Max aperture (Tele) (f/2.8 vs f/6.3)
- A17-28mm F2.8 Di III RXD has lower Weight (420 g vs 620 g)
- B18-300mm F3.5-6.3 Di III-A VC has lower Diameter (65 mm vs 86 mm)
- A17-28mm F2.8 Di III RXD has lower Length (109 mm vs 137 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 17-28mm F2.8 Di III RXD
- ✓
Max aperture (Tele)
f/2.8 vs f/6.3 — lower is better
- ✓
Weather sealing
Only 17-28mm F2.8 Di III RXD supports it
- ✓
Weight
420 g vs 620 g — lower is better
- ✓
Length
109 mm vs 137 mm — lower is better
- ✓
Max aperture (Wide)
f/2.8 vs f/3.5 — lower is better
Reasons to choose the 18-300mm F3.5-6.3 Di III-A VC
- ✓
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 86 mm — lower is better
Shared specifications
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.
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
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
Decided which one is right for you?
Compare live prices for the 17-28mm F2.8 Di III RXD and 18-300mm F3.5-6.3 Di III-A VC at major authorized retailers.
Tamron 17-28mm F2.8 Di III RXD
Tamron 18-300mm F3.5-6.3 Di III-A VC
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.