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
Viltrox
AF 13mm F1.4 XF
Fujifilm X Mount
AF 13mm F1.4 XF — 13mm f/1.4 for Fujifilm X, a popular choice in the viltrox lineup.
$429
Launch priceReleased Aug 2023
AF 13mm F1.4 XF is 2.1 years newer.
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Wins
28-75mm F2.8 Di III VXD G2
Wins
AF 13mm F1.4 XF
1 categories tied
TL;DR — Key differences
- A28-75mm F2.8 Di III VXD G2 has higher Max magnification (0.37 × vs 0.1 ×)
- BAF 13mm F1.4 XF has lower Max aperture (Wide) (f/1.4 vs f/2.8)
- BAF 13mm F1.4 XF has lower Max aperture (Tele) (f/1.4 vs f/2.8)
- BAF 13mm F1.4 XF has lower Length (74 mm vs 118 mm)
- BAF 13mm F1.4 XF has lower Weight (370 g vs 540 g)
Key specs at a glance
Size and weight, to scale
28-75mm F2.8 Di III VXD G2
⌀76 × 118 mm
540 g (1.19 lb / 19.05 oz)
Credit card
85.6 × 54 mm
for scale
AF 13mm F1.4 XF
⌀74 × 74 mm
370 g (0.82 lb / 13.05 oz)
28-75mm F2.8 Di III VXD G2 is 44mm longer and 2mm wider than AF 13mm F1.4 XF.
28-75mm F2.8 Di III VXD G2 is 170 g heavier than AF 13mm F1.4 XF.
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 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 0.1 × — higher is better
- ✓
Min focus distance
18 cm vs 20 cm — lower is better
Reasons to choose the AF 13mm F1.4 XF
- ✓
Special elements
Adds 2 Aspherical, 2 ED, 2 HR
- ✓
Max aperture (Wide)
f/1.4 vs f/2.8 — lower is better
- ✓
Max aperture (Tele)
f/1.4 vs f/2.8 — lower is better
- ✓
Length
74 mm vs 118 mm — lower is better
- ✓
Weight
370 g vs 540 g — lower is better
- ✓
Diameter
74 mm vs 76 mm — lower is better
Shared specifications
Internal focus
Both support internal focus
Weather sealing
Both support weather sealing
Pros & cons at a glance
Editorially curated highlights and trade-offs.
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
AF 13mm F1.4 XF
Pros
- ✓Bright f/1.4 aperture for low light and subject separation
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Lightweight design easy to carry all day
Cons
- –Third-party or older alternatives may offer better value
Decided which one is right for you?
Compare live prices for the 28-75mm F2.8 Di III VXD G2 and AF 13mm F1.4 XF at major authorized retailers.
Tamron 28-75mm F2.8 Di III VXD G2
Viltrox AF 13mm F1.4 XF
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.