Canon
RF 24-70mm F2.8L IS USM
Canon RF Mount
The cornerstone zoom for Canon mirrorless, featuring 5 stops of optical image stabilization.
$2,399
Launch priceReleased Aug 2019
Sigma
28-45mm F1.8 DG DN Art
Nikon Z Mount
28-45mm F1.8 DG DN Art — 28–45mm f/1.8 for Nikon Z, a popular choice in the sigma lineup.
$1,499
Launch priceReleased Sep 2024
28-45mm F1.8 DG DN Art is 5 years newer.
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Wins
RF 24-70mm F2.8L IS USM
Wins
28-45mm F1.8 DG DN Art
Which would you choose?
TL;DR — Key differences
- ARF 24-70mm F2.8L IS USM has higher OIS effectiveness (5 stops vs 0 stops)
- B28-45mm F1.8 DG DN Art has lower Max aperture (Wide) (f/1.8 vs f/2.8)
- B28-45mm F1.8 DG DN Art has lower Max aperture (Tele) (f/1.8 vs f/2.8)
- ARF 24-70mm F2.8L IS USM has lower Min focus distance (21 cm vs 30 cm)
- ARF 24-70mm F2.8L IS USM has lower Length (125 mm vs 153.4 mm)
Key specs at a glance
Size and weight, to scale
📸 Snap this lens size diff to share
RF 24-70mm F2.8L IS USM
⌀88 × 125 mm
900 g (1.98 lb / 31.75 oz)
Credit card
85.6 × 54 mm
for scale
28-45mm F1.8 DG DN Art
⌀89 × 153 mm
950 g (2.09 lb / 33.51 oz)
RF 24-70mm F2.8L IS USM is 28mm shorter and 1mm narrower than 28-45mm F1.8 DG DN Art.
RF 24-70mm F2.8L IS USM is 50 g lighter than 28-45mm F1.8 DG DN Art.
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 RF 24-70mm F2.8L IS USM
- ✓
OIS effectiveness
5 stops vs 0 stops — higher is better
- ✓
Special elements
Adds 3 UD
- ✓
Optical stabilization
Only RF 24-70mm F2.8L IS USM supports it
- ✓
Min focus distance
21 cm vs 30 cm — lower is better
- ✓
Length
125 mm vs 153.4 mm — lower is better
- ✓
Weight
900 g vs 950 g — lower is better
- ✓
Max magnification
0.3 × vs 0.25 × — higher is better
- ✓
Diameter
88 mm vs 88.9 mm — lower is better
Reasons to choose the 28-45mm F1.8 DG DN Art
- ✓
Special elements
Adds 2 SLD
- ✓
Custom function button
Only 28-45mm F1.8 DG DN Art supports it
- ✓
Max aperture (Wide)
f/1.8 vs f/2.8 — lower is better
- ✓
Max aperture (Tele)
f/1.8 vs f/2.8 — lower is better
Shared specifications
Internal focus
Both support internal focus
Weather sealing
Both support weather sealing
Control ring
Both support control ring
Pros & cons at a glance
Editorially curated highlights and trade-offs.
RF 24-70mm F2.8L IS USM
Pros
- ✓Built-in optical image stabilization (up to 5 stops)
- ✓Excellent L-series sharpness and build quality
- ✓Fast and silent Nano USM focus motor
- ✓Very low chromatic aberration
Cons
- –Heavier than competitive options (900g)
- –Pricey entry threshold
- –Minor barrel distortion at 24mm
28-45mm F1.8 DG DN Art
Pros
- ✓Versatile zoom range covers multiple focal lengths in one lens
- ✓Weather-sealed construction for outdoor shooting
- ✓Native Nikon Z mount compatibility
Cons
- –Relatively heavy for extended handheld use
- –Third-party or older alternatives may offer better value
Decided which one is right for you?
Compare live prices for the RF 24-70mm F2.8L IS USM and 28-45mm F1.8 DG DN Art at major authorized retailers.
Canon RF 24-70mm F2.8L IS USM
Sigma 28-45mm F1.8 DG DN Art
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.