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 6400
Popular APS-C body with fast AF and 11fps burst for enthusiasts.
$899
Released Feb 2019
EOS R6 Mark II is 3.8 years newer.
Wins
EOS R6 Mark II
Wins
Alpha 6400
3 categories tied
TL;DR — Key differences
- AEOS R6 Mark II has higher IBIS effectiveness (8 stops vs 0 stops)
- AEOS R6 Mark II has higher Burst (electronic) (40 fps vs 11 fps)
- AEOS R6 Mark II has higher ISO max (native) (102,400 vs 32,000)
- AEOS R6 Mark II has higher RAW buffer depth (180 frames vs 60 frames)
- AEOS R6 Mark II has higher AF points / zones (1053 vs 425)
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 6400
120 × 67 × 60 mm
403 g (0.89 lb / 14.22 oz)
EOS R6 Mark II is 18mm wider, 32mm taller, and 29mm thicker than Alpha 6400.
EOS R6 Mark II is 277 g heavier than Alpha 6400.
Depth (front-to-back): 88mm EOS R6 Mark II · 60mm Alpha 6400
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R6 Mark II
138 × 98 mm
Alpha 6400
120 × 67 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 6400
120 × 60 mm
Sensor size, to scale
EOS R6 Mark II
35.9 × 23.9 mm · Full Frame
858 mm² area
Alpha 6400
23.5 × 15.6 mm · APS-C
367 mm² area
2.3× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
EOS R6 Mark II
Canon RF
105+
native lenses available
Alpha 6400
✓ 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 -2 EV — lower is better
Subject recognition
Adds People, Dogs, Cats…
IBIS effectiveness
8 stops vs 0 stops — higher is better
Dimensions (W×H×D mm)
Adds 138.4, 98.4, 88.4
Card types
Adds SD UHS-II, SD UHS-II
Burst (electronic)
40 fps vs 11 fps — higher is better
ISO max (native)
102,400 vs 32,000 — higher is better
RAW buffer depth
180 frames vs 60 frames — higher is better
Reasons to choose
Alpha 6400
Subject recognition
Adds Human, Animal
Dimensions (W×H×D mm)
Adds 120, 66.9, 59.7
Card types
Adds SD UHS-I
Codecs
Adds XAVC S, AVCHD
Weight
403 g vs 680 g — lower is better
Both cameras share
- ✓Resolution — Both 24.2 MP
- ✓ISO min (native) — Both 100
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Weather sealing — Both support weather sealing
- ✓EVF refresh rate — Both 120 Hz
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 6400
Pros
- ✓Fast AF
- ✓Compact
- ✓Great value
Cons
- –No IBIS
- –Older design
- –No headphone jack
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, EOS R6 Mark II or Alpha 6400?
EOS R6 Mark II scores 8.5/10 versus 4.0/10 for Alpha 6400 — 40fps burst — pro-level action capture.
What's the resolution difference between the EOS R6 Mark II and Alpha 6400?
Both cameras share the same 24.2 MP resolution.
Do the EOS R6 Mark II and Alpha 6400 have in-body image stabilization?
EOS R6 Mark II has 8-stop in-body image stabilization, while alpha 6400 does not have IBIS.
Which shoots faster bursts — the EOS R6 Mark II or the Alpha 6400?
EOS R6 Mark II reaches 40 fps electronic. Alpha 6400 reaches 11 fps electronic.
What's the weight difference between the EOS R6 Mark II and Alpha 6400?
EOS R6 Mark II weighs 680 g and Alpha 6400 weighs 403 g, so the Alpha 6400 is 277 g lighter.
Do the EOS R6 Mark II and Alpha 6400 record 4K video?
EOS R6 Mark II: 4K up to 60p. Alpha 6400: 4K up to 30p.
Are the EOS R6 Mark II and Alpha 6400 weather sealed?
EOS R6 Mark II: Yes. Alpha 6400: Yes.
Which has better battery life?
Rated battery life is 760 shots (CIPA) for the EOS R6 Mark II and 410 shots for the Alpha 6400, giving the EOS R6 Mark II the edge.
How much does each cost?
EOS R6 Mark II launched at $2,499 and Alpha 6400 at $899. The Alpha 6400 is $1,600 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Canon and Sony press materials.