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 1
Original 50MP stacked flagship for sports and wildlife pros.
$6,499
Released Jan 2021
EOS R6 Mark III is 4.8 years newer.
Wins
EOS R6 Mark III
Wins
Alpha 1
3 categories tied
Check current prices
Search these camera bodies at major authorized retailers to check current discounts, bundled lenses, and certified refurbished deals:
TL;DR — Key differences
- AEOS R6 Mark III has higher Max video bit rate (2600 Mbps vs 150 Mbps)
- BAlpha 1 has higher EVF resolution (9,437,184 vs 3,690,000)
- AEOS R6 Mark III has higher ISO max (native) (64,000 vs 32,000)
- BAlpha 1 has higher EVF refresh rate (240 Hz vs 120 Hz)
- AEOS R6 Mark III has higher IBIS effectiveness (8.5 stops vs 5.5 stops)
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 1
129 × 97 × 81 mm
737 g (1.62 lb / 26.00 oz)
EOS R6 Mark III is 10mm wider, 2mm taller, and 8mm thicker than Alpha 1.
EOS R6 Mark III is 38 g lighter than Alpha 1.
Depth (front-to-back): 88mm EOS R6 Mark III · 81mm Alpha 1
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R6 Mark III
138 × 98 mm
Alpha 1
129 × 97 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 1
129 × 81 mm
Sensor size, to scale
EOS R6 Mark III
35.9 × 23.9 mm · Full Frame
858 mm² area
Alpha 1
35.9 × 24 mm · Full Frame
862 mm² area
Lens ecosystem
Native lens selection
EOS R6 Mark III
Canon RF
105+
native lenses available
Alpha 1
✓ 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
Max video bit rate
2600 Mbps vs 150 Mbps — higher is better
Codecs
Adds CRM, XF-HEVC S, XF-AVC S
ISO max (native)
64,000 vs 32,000 — higher is better
Pre-Capture / Pre-Release
Only EOS R6 Mark III supports it
Card types
Adds CFexpress Type B
Reasons to choose
Alpha 1
Subject recognition
Adds Human, Animal, Bird
Dimensions (W×H×D mm)
Adds 128.9, 96.9, 80.8
EVF resolution
9,437,184 vs 3,690,000 — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I
Card types
Adds CFexpress Type A
EVF refresh rate
240 Hz vs 120 Hz — higher is better
Resolution
50.1 MP vs 32.5 MP — higher is better
RAW buffer depth
200 frames vs 150 frames — higher is better
Both cameras share
- ✓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
- ✓4K max frame rate — Both 120 fps
- ✓Internal RAW video — Both support internal raw video
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 1
Pros
- ✓50MP stacked
- ✓30fps burst
- ✓8K video
- ✓Pro AF
Cons
- –Superseded by A1 II
- –Very expensive
- –Large files
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for video, EOS R6 Mark III or Alpha 1?
Alpha 1 scores 9.5/10 versus 6.5/10 for EOS R6 Mark III — 8K recording for future-proof footage.
What's the resolution difference between the EOS R6 Mark III and Alpha 1?
EOS R6 Mark III is 32.5 MP and Alpha 1 is 50.1 MP, so the Alpha 1 captures more detail for cropping and large prints.
Do the EOS R6 Mark III and Alpha 1 have in-body image stabilization?
EOS R6 Mark III has 8.5-stop in-body image stabilization, while alpha 1 has 5.5-stop in-body image stabilization.
Which shoots faster bursts — the EOS R6 Mark III or the Alpha 1?
EOS R6 Mark III reaches 40 fps electronic. Alpha 1 reaches 30 fps electronic.
What's the weight difference between the EOS R6 Mark III and Alpha 1?
EOS R6 Mark III weighs 699 g and Alpha 1 weighs 737 g, so the EOS R6 Mark III is 38 g lighter.
Do the EOS R6 Mark III and Alpha 1 record 4K video?
EOS R6 Mark III: 4K up to 120p. Alpha 1: 8K (max), 4K up to 120p.
Are the EOS R6 Mark III and Alpha 1 weather sealed?
EOS R6 Mark III: Yes. Alpha 1: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the EOS R6 Mark III and 530 shots for the Alpha 1, giving the EOS R6 Mark III the edge.
How much does each cost?
EOS R6 Mark III launched at $2,799 and Alpha 1 at $6,499. The EOS R6 Mark III is $3,700 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Canon and Sony press materials.