Canon
EOS R3
Pro 24MP full-frame stacked-sensor body built for sports, news, wildlife, and high-speed hybrid capture.
$5,999
Launch priceReleased Sep 2021
Sony
Alpha 6700
26MP APS-C flagship with AI subject tracking, 4K 120p, and 5-stop IBIS.
$1,399
Launch priceReleased Jul 2023
Alpha 6700 is 1.8 years newer.
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Wins
EOS R3
Wins
Alpha 6700
2 categories tied
Which would you choose?
TL;DR — Key differences
- AEOS R3 has higher Max video bit rate (2600 Mbps vs 280 Mbps)
- AEOS R3 has higher ISO max (native) (102,400 vs 32,000)
- AEOS R3 has higher Burst (electronic) (30 fps vs 11 fps)
- AEOS R3 has higher RAW buffer depth (150 frames vs 59 frames)
- AEOS R3 has higher EVF resolution (5,760,000 vs 2,359,296)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to shareEOS R3
150 × 143 × 87 mm
1015 g (2.24 lb / 35.80 oz)
Credit card
85.6 × 54 mm
for scale
Alpha 6700
122 × 69 × 75 mm
493 g (1.09 lb / 17.39 oz)
EOS R3 is 28mm wider, 74mm taller, and 12mm thicker than Alpha 6700.
EOS R3 is 522 g heavier than Alpha 6700.
Depth (front-to-back): 87mm EOS R3 · 75mm Alpha 6700
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R3
150 × 143 mm
Credit card
85.6 × 54 mm
Alpha 6700
122 × 69 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
EOS R3
150 × 87 mm
Credit card
85.6 × 54 mm
Alpha 6700
122 × 75 mm
Sensor size, to scale
EOS R3
36 × 24 mm · Full Frame
864 mm² area
Alpha 6700
23.3 × 15.5 mm · APS-C
361 mm² area
2.4× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
EOS R3
Canon RF
105+
native lenses available
Alpha 6700
✓ 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 R3
AF low-light limit
-7.5 EV vs -3 EV — lower is better
Subject recognition
Adds People, Dogs, Cats…
Codecs
Adds RAW, H.265, H.264
Dimensions (W×H×D mm)
Adds 150, 142.6, 87.2
Card types
Adds CFexpress Type B, SD UHS-II
Max video bit rate
2600 Mbps vs 280 Mbps — higher is better
ISO max (native)
102,400 vs 32,000 — higher is better
Burst (electronic)
30 fps vs 11 fps — higher is better
Reasons to choose
Alpha 6700
Subject recognition
Adds Human, Animal, Bird…
Codecs
Adds XAVC HS, XAVC S, XAVC S-I
Dimensions (W×H×D mm)
Adds 122, 69, 75.1
Card types
Adds SD, SDHC, SDXC
Weight
493 g vs 1015 g — lower is better
EVF magnification
1.07 × vs 0.76 × — higher is better
Resolution
26 MP vs 24.1 MP — higher is better
Both cameras share
- ✓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
- ✓In-body stabilization (IBIS) — Both support in-body stabilization (ibis)
- ✓Weather sealing — Both support weather sealing
Pros & cons at a glance
Editorially curated highlights and trade-offs.
EOS R3
Pros
- ✓30fps electronic burst from a stacked full-frame sensor
- ✓Exceptional low-light AF down to -7.5 EV
- ✓Integrated pro body with large LP-E19 battery
- ✓6K RAW video and 4K 120p
- ✓Rugged weather-sealed construction
Cons
- –24MP resolution trails higher-detail rivals
- –Large integrated-grip body
- –Expensive compared with enthusiast full-frame bodies
Alpha 6700
Pros
- ✓AI-based subject recognition from A7R V
- ✓4K 120p Super35 — outstanding slow-motion
- ✓5-stop IBIS in a compact APS-C body
- ✓10-bit 4:2:2 internal recording
Cons
- –Single card slot
- –APS-C sensor — narrower DR vs. full-frame
- –LCD resolution 1.03M dots — below competitors
- –No headphone jack
Decided which one is right for you?
Compare live prices for the EOS R3 and Alpha 6700 at major authorized retailers.
Canon EOS R3
Sony Alpha 6700
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for video, EOS R3 or Alpha 6700?
EOS R3 scores 9.0/10 versus 5.0/10 for Alpha 6700 — 6K video for oversampled 4K.
What's the resolution difference between the EOS R3 and Alpha 6700?
EOS R3 is 24.1 MP and Alpha 6700 is 26 MP, so the Alpha 6700 captures more detail for cropping and large prints.
Do the EOS R3 and Alpha 6700 have in-body image stabilization?
EOS R3 has 8-stop in-body image stabilization, while Alpha 6700 has 5-stop in-body image stabilization.
Which shoots faster bursts — the EOS R3 or the Alpha 6700?
EOS R3 reaches 30 fps electronic. Alpha 6700 reaches 11 fps electronic.
What's the weight difference between the EOS R3 and Alpha 6700?
EOS R3 weighs 1015 g and Alpha 6700 weighs 493 g, so the Alpha 6700 is 522 g lighter.
Do the EOS R3 and Alpha 6700 record 4K video?
EOS R3: 6K RAW (max), 4K up to 120p. Alpha 6700: 4K up to 120p.
Are the EOS R3 and Alpha 6700 weather sealed?
EOS R3: Yes. Alpha 6700: Yes.
Which has better battery life?
Rated battery life is 620 shots (CIPA) for the EOS R3 and 550 shots for the Alpha 6700, giving the EOS R3 the edge.
How much does each cost?
EOS R3 launched at $5,999 and Alpha 6700 at $1,399. The Alpha 6700 is $4,600 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way EOS R3 vs Alpha 6700 vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed July 2026.
Product images courtesy of Canon and Sony press materials.