Canon
EOS R1
Flagship 24.2MP full-frame BSI stacked RF body with 40fps burst, Dual Pixel Intelligent AF, 6K RAW, and 9.44M-dot EVF.
$6,299
Released Jul 2024
Sony
Alpha 7 III
Classic 24MP hybrid that defined the modern full-frame value proposition.
$1,999
Released Feb 2018
EOS R1 is 6.4 years newer.
Wins
EOS R1
Wins
Alpha 7 III
3 categories tied
TL;DR — Key differences
- AEOS R1 has higher EVF resolution (9,440,000 vs 2,359,296)
- AEOS R1 has higher Burst (electronic) (40 fps vs 10 fps)
- AEOS R1 has higher 4K max frame rate (120 fps vs 30 fps)
- AEOS R1 has higher ISO max (native) (102,400 vs 51,200)
- BAlpha 7 III has lower Weight (650 g vs 1115 g)
Key specs at a glance
Size and weight, to scale
EOS R1
158 × 150 × 87 mm
1115 g (2.46 lb / 39.33 oz)
Alpha 7 III
127 × 96 × 74 mm
650 g (1.43 lb / 22.93 oz)
EOS R1 is 31mm wider, 54mm taller, and 14mm thicker than Alpha 7 III.
EOS R1 is 465 g heavier than Alpha 7 III.
Depth (front-to-back): 87mm EOS R1 · 74mm Alpha 7 III
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R1
158 × 150 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 R1
158 × 87 mm
Alpha 7 III
127 × 74 mm
Sensor size, to scale
EOS R1
36 × 24 mm · Full Frame
864 mm² area
Alpha 7 III
35.6 × 23.8 mm · Full Frame
847 mm² area
Lens ecosystem
Native lens selection
EOS R1
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 R1
AF low-light limit
-7.5 EV vs -3 EV — lower is better
Subject recognition
Adds People, Dogs, Cats…
Dimensions (W×H×D mm)
Adds 157.6, 149.5, 87.3
Card types
Adds CFexpress Type B, CFexpress Type B
Codecs
Adds RAW, XF-HEVC S, XF-AVC S…
EVF resolution
9,440,000 vs 2,359,296 — higher is better
Burst (electronic)
40 fps vs 10 fps — higher is better
4K max frame rate
120 fps vs 30 fps — higher is better
Reasons to choose
Alpha 7 III
Subject recognition
Adds Human, Animal
Dimensions (W×H×D mm)
Adds 126.9, 95.6, 73.7
Card types
Adds SD UHS-II, SD UHS-I
Codecs
Adds XAVC S, AVCHD
Weight
650 g vs 1115 g — lower 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 R1
Pros
- ✓40fps electronic burst
- ✓24.2MP BSI stacked full-frame sensor
- ✓Dual Pixel Intelligent AF
- ✓6K RAW and 4K 120p video
- ✓Dual CFexpress Type B slots
Cons
- –24MP resolution
- –Very expensive
- –Large integrated-grip body
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 R1 or Alpha 7 III?
EOS R1 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 R1 and Alpha 7 III?
Both cameras share the same 24.2 MP resolution.
Do the EOS R1 and Alpha 7 III have in-body image stabilization?
EOS R1 has 8.5-stop in-body image stabilization, while alpha 7 III has 5-stop in-body image stabilization.
Which shoots faster bursts — the EOS R1 or the Alpha 7 III?
EOS R1 reaches 40 fps electronic. Alpha 7 III reaches 10 fps electronic.
What's the weight difference between the EOS R1 and Alpha 7 III?
EOS R1 weighs 1115 g and Alpha 7 III weighs 650 g, so the Alpha 7 III is 465 g lighter.
Do the EOS R1 and Alpha 7 III record 4K video?
EOS R1: 6K RAW (max), 4K up to 120p. Alpha 7 III: 4K up to 30p.
Are the EOS R1 and Alpha 7 III weather sealed?
EOS R1: Yes. Alpha 7 III: Yes.
How much does each cost?
EOS R1 launched at $6,299 and Alpha 7 III at $1,999. The Alpha 7 III is $4,300 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Canon and Sony press materials.