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 7 III
Classic 24MP hybrid that defined the modern full-frame value proposition.
$1,999
Released Feb 2018
EOS R6 Mark II is 4.8 years newer.
Wins
EOS R6 Mark II
Wins
Alpha 7 III
4 categories tied
TL;DR — Key differences
- AEOS R6 Mark II has higher Burst (electronic) (40 fps vs 10 fps)
- AEOS R6 Mark II has higher Max video bit rate (340 Mbps vs 100 Mbps)
- AEOS R6 Mark II has higher RAW buffer depth (180 frames vs 89 frames)
- AEOS R6 Mark II has higher ISO max (native) (102,400 vs 51,200)
- AEOS R6 Mark II has higher 4K max frame rate (60 fps vs 30 fps)
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 7 III
127 × 96 × 74 mm
650 g (1.43 lb / 22.93 oz)
EOS R6 Mark II is 12mm wider, 3mm taller, and 15mm thicker than Alpha 7 III.
EOS R6 Mark II is 30 g heavier than Alpha 7 III.
Depth (front-to-back): 88mm EOS R6 Mark II · 74mm Alpha 7 III
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R6 Mark II
138 × 98 mm
Alpha 7 III
127 × 96 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 7 III
127 × 74 mm
Sensor size, to scale
EOS R6 Mark II
35.9 × 23.9 mm · Full Frame
858 mm² area
Alpha 7 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 7 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 -3 EV — lower is better
Subject recognition
Adds People, Dogs, Cats…
Dimensions (W×H×D mm)
Adds 138.4, 98.4, 88.4
Burst (electronic)
40 fps vs 10 fps — higher is better
Max video bit rate
340 Mbps vs 100 Mbps — higher is better
RAW buffer depth
180 frames vs 89 frames — higher is better
ISO max (native)
102,400 vs 51,200 — higher is better
Pre-Capture / Pre-Release
Only EOS R6 Mark II supports it
Reasons to choose
Alpha 7 III
Subject recognition
Adds Human, Animal
Dimensions (W×H×D mm)
Adds 126.9, 95.6, 73.7
Codecs
Adds XAVC S, AVCHD
Card types
Adds SD UHS-I
Weight
650 g vs 680 g — lower is better
EVF magnification
0.78 × vs 0.76 × — higher is better
Both cameras share
- ✓Resolution — Both 24.2 MP
- ✓AA filter — Both support aa filter
- ✓ISO min (native) — Both 100
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓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 7 III
Pros
- ✓Proven reliability
- ✓Great battery life
- ✓Strong value used
- ✓Dual card slots
Cons
- –Older AF vs newer bodies
- –4K 30p only
- –No 10-bit internal
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, EOS R6 Mark II or Alpha 7 III?
EOS R6 Mark II scores 8.5/10 versus 4.0/10 for Alpha 7 III — 40fps burst — pro-level action capture.
What's the resolution difference between the EOS R6 Mark II and Alpha 7 III?
Both cameras share the same 24.2 MP resolution.
Do the EOS R6 Mark II and Alpha 7 III have in-body image stabilization?
EOS R6 Mark II has 8-stop in-body image stabilization, while alpha 7 III has 5-stop in-body image stabilization.
Which shoots faster bursts — the EOS R6 Mark II or the Alpha 7 III?
EOS R6 Mark II reaches 40 fps electronic. Alpha 7 III reaches 10 fps electronic.
What's the weight difference between the EOS R6 Mark II and Alpha 7 III?
EOS R6 Mark II weighs 680 g and Alpha 7 III weighs 650 g, so the Alpha 7 III is 30 g lighter.
Do the EOS R6 Mark II and Alpha 7 III record 4K video?
EOS R6 Mark II: 4K up to 60p. Alpha 7 III: 4K up to 30p.
Are the EOS R6 Mark II and Alpha 7 III weather sealed?
EOS R6 Mark II: Yes. Alpha 7 III: Yes.
Which has better battery life?
Rated battery life is 760 shots (CIPA) for the EOS R6 Mark II and 710 shots for the Alpha 7 III, giving the EOS R6 Mark II the edge.
How much does each cost?
EOS R6 Mark II launched at $2,499 and Alpha 7 III at $1,999. The Alpha 7 III is $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.