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
Summilux-SL 50mm f/1.4 ASPH.
Leica L Mount
Summilux-SL 50mm f/1.4 ASPH. — 50mm f/1.4 for Leica L, a popular choice in the leica lineup.
$5,195
Launch priceReleased Sep 2015
RF 24-70mm F2.8L IS USM is 3.9 years newer.
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Wins
RF 24-70mm F2.8L IS USM
Wins
Summilux-SL 50mm f/1.4 ASPH.
1 categories tied
TL;DR — Key differences
- ARF 24-70mm F2.8L IS USM has higher OIS effectiveness (5 stops vs 0 stops)
- ARF 24-70mm F2.8L IS USM has lower Min focus distance (21 cm vs 60 cm)
- ARF 24-70mm F2.8L IS USM has higher Max magnification (0.3 × vs 0.14 ×)
- BSummilux-SL 50mm f/1.4 ASPH. has lower Max aperture (Wide) (f/1.4 vs f/2.8)
- BSummilux-SL 50mm f/1.4 ASPH. has lower Max aperture (Tele) (f/1.4 vs f/2.8)
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
Summilux-SL 50mm f/1.4 ASPH.
⌀88 × 108 mm
680 g (1.50 lb / 23.99 oz)
RF 24-70mm F2.8L IS USM is 17mm longer than Summilux-SL 50mm f/1.4 ASPH..
RF 24-70mm F2.8L IS USM is 220 g heavier than Summilux-SL 50mm f/1.4 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
- ✓
Min focus distance
21 cm vs 60 cm — lower is better
- ✓
Optical stabilization
Only RF 24-70mm F2.8L IS USM supports it
- ✓
Max magnification
0.3 × vs 0.14 × — higher is better
Reasons to choose the Summilux-SL 50mm f/1.4 ASPH.
- ✓
Special elements
Adds 2 Aspherical, 2 ED
- ✓
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
- ✓
Custom function button
Only Summilux-SL 50mm f/1.4 ASPH. supports it
- ✓
Weight
680 g vs 900 g — lower is better
- ✓
Length
108 mm vs 125 mm — lower is better
Shared specifications
Internal focus
Both support internal focus
Diameter
Both 88 mm
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
Summilux-SL 50mm f/1.4 ASPH.
Pros
- ✓Bright f/1.4 aperture for low light and subject separation
- ✓Prime design typically delivers strong sharpness and lighter weight
- ✓Weather-sealed construction for outdoor shooting
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 Summilux-SL 50mm f/1.4 ASPH. at major authorized retailers.
Canon RF 24-70mm F2.8L IS USM
Leica Summilux-SL 50mm f/1.4 ASPH.
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Full specifications
✓ = category winner
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.