Canon
EOS R6 Mark III
Hybrid 32.5MP full-frame RF body with 7K RAW video, 40fps electronic burst, 8.5-stop IBIS, and Dual Pixel CMOS AF II.
$2,799
Released Nov 2025
Sony
Alpha 7S II
12MP low-light video pioneer before the A7S III revolution.
$2,999
Released Sep 2015
EOS R6 Mark III is 10.2 years newer.
Wins
EOS R6 Mark III
Wins
Alpha 7S II
2 categories tied
Check current prices
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TL;DR — Key differences
- AEOS R6 Mark III has higher Max video bit rate (2600 Mbps vs 200 Mbps)
- AEOS R6 Mark III has higher Burst (electronic) (40 fps vs 5 fps)
- AEOS R6 Mark III has higher AF points / zones (1053 vs 169)
- AEOS R6 Mark III has higher 4K max frame rate (120 fps vs 30 fps)
- AEOS R6 Mark III has higher Resolution (32.5 MP vs 12.2 MP)
Key specs at a glance
Size and weight, to scale
EOS R6 Mark III
138 × 98 × 88 mm
699 g (1.54 lb / 24.66 oz)
Alpha 7S II
127 × 96 × 60 mm
627 g (1.38 lb / 22.12 oz)
EOS R6 Mark III is 12mm wider, 3mm taller, and 28mm thicker than Alpha 7S II.
EOS R6 Mark III is 72 g heavier than Alpha 7S II.
Depth (front-to-back): 88mm EOS R6 Mark III · 60mm Alpha 7S II
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R6 Mark III
138 × 98 mm
Alpha 7S II
127 × 96 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
EOS R6 Mark III
138 × 88 mm
Alpha 7S II
127 × 60 mm
Sensor size, to scale
EOS R6 Mark III
35.9 × 23.9 mm · Full Frame
858 mm² area
Alpha 7S II
35.6 × 23.8 mm · Full Frame
847 mm² area
Lens ecosystem
Native lens selection
EOS R6 Mark III
Canon RF
105+
native lenses available
Alpha 7S 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
EOS R6 Mark III
AF low-light limit
-6.5 EV vs -4 EV — lower is better
Subject recognition
Adds People, Dogs, Cats…
Dimensions (W×H×D mm)
Adds 138.4, 98.4, 88.4
Card types
Adds CFexpress Type B, SD UHS-II
Max video bit rate
2600 Mbps vs 200 Mbps — higher is better
Burst (electronic)
40 fps vs 5 fps — higher is better
AF points / zones
1053 vs 169 — higher is better
Codecs
Adds CRM, XF-HEVC S, XF-AVC S…
Reasons to choose
Alpha 7S II
Subject recognition
Adds Human
Dimensions (W×H×D mm)
Adds 126.9, 95.7, 60.3
Card types
Adds SD UHS-I
Codecs
Adds XAVC S, AVCHD, MP4
ISO max (native)
102,400 vs 64,000 — higher is better
Weight
627 g vs 699 g — lower is better
EVF magnification
0.78 × vs 0.76 × — higher is better
Both cameras share
- ✓AA filter — Both support aa filter
- ✓ISO min (native) — Both 100
- ✓Eye AF — Both support eye af
- ✓In-body stabilization — Both support in-body stabilization
- ✓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 III
Pros
- ✓32.5MP full-frame sensor
- ✓7K RAW video & 4K 120p
- ✓40fps electronic burst with Pre-Continuous
- ✓8.5-stop IBIS
Cons
- –Single CFexpress Type B + SD slot
- –Smaller LCD than R5 II
- –LP-E6P required for full features
Alpha 7S II
Pros
- ✓Legendary low light
- ✓4K internal
- ✓Compact files
Cons
- –12MP stills limit
- –Old AF
- –8-bit 4K
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, EOS R6 Mark III or Alpha 7S II?
EOS R6 Mark III scores 8.5/10 versus 1.5/10 for Alpha 7S II — 40fps burst — pro-level action capture.
What's the resolution difference between the EOS R6 Mark III and Alpha 7S II?
EOS R6 Mark III is 32.5 MP and Alpha 7S II is 12.2 MP, so the EOS R6 Mark III captures more detail for cropping and large prints.
Do the EOS R6 Mark III and Alpha 7S II have in-body image stabilization?
EOS R6 Mark III has 8.5-stop in-body image stabilization, while alpha 7S II has 4.5-stop in-body image stabilization.
Which shoots faster bursts — the EOS R6 Mark III or the Alpha 7S II?
EOS R6 Mark III reaches 40 fps electronic. Alpha 7S II reaches 5 fps electronic.
What's the weight difference between the EOS R6 Mark III and Alpha 7S II?
EOS R6 Mark III weighs 699 g and Alpha 7S II weighs 627 g, so the Alpha 7S II is 72 g lighter.
Do the EOS R6 Mark III and Alpha 7S II record 4K video?
EOS R6 Mark III: 4K up to 120p. Alpha 7S II: 4K up to 30p.
Are the EOS R6 Mark III and Alpha 7S II weather sealed?
EOS R6 Mark III: Yes. Alpha 7S II: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the EOS R6 Mark III and 310 shots for the Alpha 7S II, giving the EOS R6 Mark III the edge.
How much does each cost?
EOS R6 Mark III launched at $2,799 and Alpha 7S II at $2,999. The EOS R6 Mark III is $200 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Canon and Sony press materials.