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
Leica
Summicron-SL 35mm f/2 ASPH.
Leica L Mount
Summicron-SL 35mm f/2 ASPH. — 35mm f/2 for Leica L, a popular choice in the leica lineup.
$2,195
Launch priceReleased Jan 2017
RF 24-70mm F2.8L IS USM is 2.7 years newer.
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Wins
RF 24-70mm F2.8L IS USM
Wins
Summicron-SL 35mm f/2 ASPH.
TL;DR — Key differences
- ARF 24-70mm F2.8L IS USM has higher OIS effectiveness (5 stops vs 0 stops)
- BSummicron-SL 35mm f/2 ASPH. has lower Weight (538 g vs 900 g)
- ARF 24-70mm F2.8L IS USM has lower Min focus distance (21 cm vs 35 cm)
- ARF 24-70mm F2.8L IS USM has higher Max magnification (0.3 × vs 0.2 ×)
- BSummicron-SL 35mm f/2 ASPH. has lower Length (89 mm vs 125 mm)
Key specs at a glance
Size and weight, to scale
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
Summicron-SL 35mm f/2 ASPH.
⌀73 × 89 mm
538 g (1.19 lb / 18.98 oz)
RF 24-70mm F2.8L IS USM is 36mm longer and 15mm wider than Summicron-SL 35mm f/2 ASPH..
RF 24-70mm F2.8L IS USM is 362 g heavier than Summicron-SL 35mm f/2 ASPH..
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
- ✓
Special elements
Adds 3 Aspherical, 3 UD
- ✓
OIS effectiveness
5 stops vs 0 stops — higher is better
- ✓
Optical stabilization
Only RF 24-70mm F2.8L IS USM supports it
- ✓
Min focus distance
21 cm vs 35 cm — lower is better
- ✓
Max magnification
0.3 × vs 0.2 × — higher is better
Reasons to choose the Summicron-SL 35mm f/2 ASPH.
- ✓
Special elements
Adds 2 Aspherical
- ✓
Custom function button
Only Summicron-SL 35mm f/2 ASPH. supports it
- ✓
Weight
538 g vs 900 g — lower is better
- ✓
Length
89 mm vs 125 mm — lower is better
- ✓
Max aperture (Wide)
f/2 vs f/2.8 — lower is better
- ✓
Max aperture (Tele)
f/2 vs f/2.8 — lower is better
- ✓
Diameter
73 mm vs 88 mm — 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
Summicron-SL 35mm f/2 ASPH.
Pros
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Weather-sealed construction for outdoor shooting
- ✓Native Leica L mount compatibility
Cons
- –Premium price point
- –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 Summicron-SL 35mm f/2 ASPH. at major authorized retailers.
Canon RF 24-70mm F2.8L IS USM
Leica Summicron-SL 35mm f/2 ASPH.
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.