Sigma
18-50mm F2.8 DC DN Contemporary
Fujifilm X Mount
18-50mm F2.8 DC DN Contemporary — 18–50mm f/2.8 for Fujifilm X, a popular choice in the sigma lineup.
$549
Launch priceReleased Apr 2023
Sigma
28-70mm F2.8 DG DN
Sony E Mount
28-70mm F2.8 DG DN — 28–70mm f/2.8 for Sony E, a popular choice in the sigma lineup.
$899
Launch priceReleased Mar 2021
18-50mm F2.8 DC DN Contemporary is 2.1 years newer.
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Wins
18-50mm F2.8 DC DN Contemporary
Wins
28-70mm F2.8 DG DN
3 categories tied
TL;DR — Key differences
- A18-50mm F2.8 DC DN Contemporary has lower Min focus distance (12 cm vs 38 cm)
- A18-50mm F2.8 DC DN Contemporary has lower Weight (285 g vs 470 g)
- A18-50mm F2.8 DC DN Contemporary has lower Length (76.8 mm vs 116 mm)
- A18-50mm F2.8 DC DN Contemporary has higher Max magnification (0.36 × vs 0.25 ×)
- A18-50mm F2.8 DC DN Contemporary has lower Diameter (64.5 mm vs 70 mm)
Key specs at a glance
Size and weight, to scale
18-50mm F2.8 DC DN Contemporary
⌀65 × 77 mm
285 g (0.63 lb / 10.05 oz)
Credit card
85.6 × 54 mm
for scale
28-70mm F2.8 DG DN
⌀70 × 116 mm
470 g (1.04 lb / 16.58 oz)
18-50mm F2.8 DC DN Contemporary is 39mm shorter and 6mm narrower than 28-70mm F2.8 DG DN.
18-50mm F2.8 DC DN Contemporary is 185 g lighter than 28-70mm F2.8 DG DN.
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 18-50mm F2.8 DC DN Contemporary
- ✓
Special elements
Adds 1 SLD, 3 Aspherical
- ✓
Min focus distance
12 cm vs 38 cm — lower is better
- ✓
Weight
285 g vs 470 g — lower is better
- ✓
Length
76.8 mm vs 116 mm — lower is better
- ✓
Max magnification
0.36 × vs 0.25 × — higher is better
- ✓
Diameter
64.5 mm vs 70 mm — lower is better
Reasons to choose the 28-70mm F2.8 DG DN
- ✓
Special elements
Adds Aspherical
- ✓
Weather sealing
Only 28-70mm F2.8 DG DN supports it
Shared specifications
Max aperture (Wide)
Both f/2.8
Max aperture (Tele)
Both f/2.8
Internal focus
Both support internal focus
Pros & cons at a glance
Editorially curated highlights and trade-offs.
18-50mm F2.8 DC DN Contemporary
Pros
- ✓Versatile zoom range covers multiple focal lengths in one lens
- ✓Lightweight design easy to carry all day
- ✓Native Fujifilm X mount compatibility
Cons
- –Third-party or older alternatives may offer better value
28-70mm F2.8 DG DN
Pros
- ✓Versatile zoom range covers multiple focal lengths in one lens
- ✓Weather-sealed construction for outdoor shooting
- ✓Native Sony E mount compatibility
Cons
- –No optical stabilization — relies on body IBIS
- –Third-party or older alternatives may offer better value
Decided which one is right for you?
Compare live prices for the 18-50mm F2.8 DC DN Contemporary and 28-70mm F2.8 DG DN at major authorized retailers.
Sigma 18-50mm F2.8 DC DN Contemporary
Sigma 28-70mm F2.8 DG DN
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.