Leica
SL3-S
Fast 24.6MP L-mount hybrid with 6K open-gate video, 30fps burst, and 5-axis stabilization.
$5,295
Released Jan 2025
Sony
Alpha 1 II
50MP stacked flagship with 30fps RAW, 8K video, and Sony's fastest hybrid performance.
$6,499
Released Nov 2024
SL3-S is 2 months newer.
Wins
SL3-S
Wins
Alpha 1 II
2 categories tied
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TL;DR — Key differences
- ASL3-S has higher ISO max (native) (200,000 vs 32,000)
- BAlpha 1 II has higher Resolution (50.1 MP vs 24.6 MP)
- ASL3-S has lower ISO min (native) (50 vs 100)
- BAlpha 1 II has higher 4K max frame rate (120 fps vs 60 fps)
- BAlpha 1 II has higher EVF refresh rate (240 Hz vs 120 Hz)
Key specs at a glance
Size and weight, to scale
SL3-S
141 × 108 × 83 mm
768 g (1.69 lb / 27.09 oz)
Alpha 1 II
136 × 97 × 83 mm
743 g (1.64 lb / 26.21 oz)
SL3-S is 5mm wider and 11mm taller than Alpha 1 II.
SL3-S is 25 g heavier than Alpha 1 II.
Depth (front-to-back): 83mm SL3-S · 83mm Alpha 1 II
Sensor size, to scale
SL3-S
36 × 24 mm · Full Frame
864 mm² area
Alpha 1 II
35.9 × 24 mm · Full Frame
862 mm² area
Lens ecosystem
Native lens selection
SL3-S
Leica L
80+
native lenses available
Alpha 1 II
✓ more lensesSony E
350+
native lenses available
Counts include current first-party and major third-party native autofocus lenses.
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
SL3-S
Dimensions (W×H×D mm)
Adds 141.2, 108, 82.7
ISO max (native)
200,000 vs 32,000 — higher is better
ISO min (native)
50 vs 100 — lower is better
Card types
Adds CFexpress Type B
Codecs
Adds Apple ProRes
Max video bit rate
200 Mbps vs 150 Mbps — higher is better
AF frame coverage
100 % vs 94 % — higher is better
AF points / zones
779 vs 759 — higher is better
Reasons to choose
Alpha 1 II
Dimensions (W×H×D mm)
Adds 136.1, 96.9, 82.9
Subject recognition
Adds Bird, Insect, Car/Train…
Codecs
Adds XAVC HS, XAVC S, XAVC S-I
Resolution
50.1 MP vs 24.6 MP — higher is better
AA filter
Only Alpha 1 II supports it
Pre-Capture / Pre-Release
Only Alpha 1 II supports it
4K max frame rate
120 fps vs 60 fps — higher is better
Card types
Adds CFexpress Type A
Both cameras share
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Burst (electronic) — Both 30 fps
- ✓Internal RAW video — Both support internal raw video
- ✓In-body stabilization — Both support in-body stabilization
- ✓Weather sealing — Both support weather sealing
Pros & cons at a glance
Editorially curated highlights and trade-offs.
SL3-S
Pros
- ✓6K open-gate video
- ✓30fps electronic burst
- ✓24.6MP full-frame
- ✓CFexpress plus SD
Cons
- –Lower resolution than SL3
- –Large body
- –Premium price
Alpha 1 II
Pros
- ✓50MP stacked sensor
- ✓30fps blackout-free burst
- ✓8K 30p video
- ✓Best Sony AF
Cons
- –Very expensive
- –Complex menus
- –Large files
Decided which one is right for you?
Compare live prices for the SL3-S and Alpha 1 II at major authorized retailers.
Leica SL3-S
Sony Alpha 1 II
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, SL3-S or Alpha 1 II?
Alpha 1 II scores 9.0/10 versus 5.5/10 for SL3-S — 30fps burst — pro-level action capture.
What's the resolution difference between the SL3-S and Alpha 1 II?
SL3-S is 24.6 MP and Alpha 1 II is 50.1 MP, so the Alpha 1 II captures more detail for cropping and large prints.
Do the SL3-S and Alpha 1 II have in-body image stabilization?
SL3-S has 5-stop in-body image stabilization, while alpha 1 II has 8.5-stop in-body image stabilization.
Which shoots faster bursts — the SL3-S or the Alpha 1 II?
SL3-S reaches 30 fps electronic. Alpha 1 II reaches 30 fps electronic.
What's the weight difference between the SL3-S and Alpha 1 II?
SL3-S weighs 768 g and Alpha 1 II weighs 743 g, so the Alpha 1 II is 25 g lighter.
Do the SL3-S and Alpha 1 II record 4K video?
SL3-S: 6K Open Gate (max), 4K up to 60p. Alpha 1 II: 8K (max), 4K up to 120p.
Are the SL3-S and Alpha 1 II weather sealed?
SL3-S: Yes. Alpha 1 II: Yes.
How much does each cost?
SL3-S launched at $5,295 and Alpha 1 II at $6,499. The SL3-S is $1,204 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Leica and Sony press materials.