Canon
EOS R6 Mark II
Versatile 24.2MP full-frame hybrid with class-leading AF and 4K 60p video.
$2,499
Released Nov 2022
Sony
Alpha 9 III
Global shutter sports flagship with 120fps and zero rolling shutter for pro action.
$5,999
Released Jan 2024
Alpha 9 III is 1.2 years newer.
Wins
EOS R6 Mark II
Wins
Alpha 9 III
2 categories tied
TL;DR — Key differences
- AEOS R6 Mark II has higher Burst (mechanical) (12 fps vs 0 fps)
- AEOS R6 Mark II has higher ISO max (native) (102,400 vs 25,600)
- BAlpha 9 III has higher Burst (electronic) (120 fps vs 40 fps)
- BAlpha 9 III has higher EVF resolution (9,437,184 vs 3,690,000)
- AEOS R6 Mark II has lower ISO min (native) (100 vs 250)
Key specs at a glance
Size and weight, to scale
EOS R6 Mark II
138 × 98 × 88 mm
680 g (1.50 lb / 23.99 oz)
Alpha 9 III
136 × 97 × 83 mm
703 g (1.55 lb / 24.80 oz)
EOS R6 Mark II is 2mm wider, 2mm taller, and 6mm thicker than Alpha 9 III.
EOS R6 Mark II is 23 g lighter than Alpha 9 III.
Depth (front-to-back): 88mm EOS R6 Mark II · 83mm Alpha 9 III
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R6 Mark II
138 × 98 mm
Alpha 9 III
136 × 97 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
EOS R6 Mark II
138 × 88 mm
Alpha 9 III
136 × 83 mm
Sensor size, to scale
EOS R6 Mark II
35.9 × 23.9 mm · Full Frame
858 mm² area
Alpha 9 III
35.6 × 23.8 mm · Full Frame
847 mm² area
Lens ecosystem
Native lens selection
EOS R6 Mark II
Canon RF
105+
native lenses available
Alpha 9 III
✓ 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
EOS R6 Mark II
AF low-light limit
-6.5 EV vs -5 EV — lower is better
Subject recognition
Adds People, Dogs, Cats…
Burst (mechanical)
12 fps vs 0 fps — higher is better
Dimensions (W×H×D mm)
Adds 138.4, 98.4, 88.4
ISO max (native)
102,400 vs 25,600 — higher is better
ISO min (native)
100 vs 250 — lower is better
Battery life (CIPA)
760 shots vs 400 shots — higher is better
AF points / zones
1053 vs 759 — higher is better
Reasons to choose
Alpha 9 III
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 136.1, 96.9, 82.9
Burst (electronic)
120 fps vs 40 fps — higher is better
EVF resolution
9,437,184 vs 3,690,000 — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I
4K max frame rate
120 fps vs 60 fps — higher is better
Card types
Adds CFexpress Type A
EVF refresh rate
240 Hz vs 120 Hz — higher is better
Both cameras share
- ✓AA filter — Both support aa filter
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
- ✓Internal RAW video — Both support internal raw video
- ✓In-body stabilization — Both support in-body stabilization
Pros & cons at a glance
Editorially curated highlights and trade-offs.
EOS R6 Mark II
Pros
- ✓Up to 40fps electronic burst
- ✓4K 60p oversampled from 6K
- ✓Dual Pixel CMOS AF II — superb subject tracking
- ✓8-stop IBIS
- ✓Fully articulating touchscreen
Cons
- –24.2MP may feel limiting for large prints
- –No CFexpress on base body
- –Short battery life vs. A7 IV
Alpha 9 III
Pros
- ✓Global shutter 120fps
- ✓Zero rolling shutter
- ✓Pro sports AF
- ✓Pre-capture buffer
Cons
- –24.6MP only
- –Premium price
- –Battery drain at max speed
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for wildlife, EOS R6 Mark II or Alpha 9 III?
Alpha 9 III scores 9.5/10 versus 6.5/10 for EOS R6 Mark II — 120fps burst captures fleeting moments.
What's the resolution difference between the EOS R6 Mark II and Alpha 9 III?
EOS R6 Mark II is 24.2 MP and Alpha 9 III is 24.6 MP, so the Alpha 9 III captures more detail for cropping and large prints.
Do the EOS R6 Mark II and Alpha 9 III have in-body image stabilization?
EOS R6 Mark II has 8-stop in-body image stabilization, while alpha 9 III has 8-stop in-body image stabilization.
Which shoots faster bursts — the EOS R6 Mark II or the Alpha 9 III?
EOS R6 Mark II reaches 40 fps electronic. Alpha 9 III reaches 120 fps electronic.
What's the weight difference between the EOS R6 Mark II and Alpha 9 III?
EOS R6 Mark II weighs 680 g and Alpha 9 III weighs 703 g, so the EOS R6 Mark II is 23 g lighter.
Do the EOS R6 Mark II and Alpha 9 III record 4K video?
EOS R6 Mark II: 4K up to 60p. Alpha 9 III: 4K up to 120p.
Are the EOS R6 Mark II and Alpha 9 III weather sealed?
EOS R6 Mark II: Yes. Alpha 9 III: Yes.
Which has better battery life?
Rated battery life is 760 shots (CIPA) for the EOS R6 Mark II and 400 shots for the Alpha 9 III, giving the EOS R6 Mark II the edge.
How much does each cost?
EOS R6 Mark II launched at $2,499 and Alpha 9 III at $5,999. The EOS R6 Mark II is $3,500 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Canon and Sony press materials.