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 6700
26MP APS-C flagship with AI subject tracking, 4K 120p, and 5-stop IBIS.
$1,399
Released Jul 2023
EOS R6 Mark III is 2.3 years newer.
Wins
EOS R6 Mark III
Wins
Alpha 6700
2 categories tied
TL;DR — Key differences
- AEOS R6 Mark III has higher Max video bit rate (2600 Mbps vs 600 Mbps)
- AEOS R6 Mark III has higher Burst (electronic) (40 fps vs 11 fps)
- AEOS R6 Mark III has higher RAW buffer depth (150 frames vs 44 frames)
- AEOS R6 Mark III has higher ISO max (native) (64,000 vs 32,000)
- AEOS R6 Mark III has higher Card slots (2 vs 1)
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 6700
122 × 69 × 75 mm
493 g (1.09 lb / 17.39 oz)
EOS R6 Mark III is 16mm wider, 29mm taller, and 13mm thicker than Alpha 6700.
EOS R6 Mark III is 206 g heavier than Alpha 6700.
Depth (front-to-back): 88mm EOS R6 Mark III · 75mm Alpha 6700
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R6 Mark III
138 × 98 mm
Alpha 6700
122 × 69 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 6700
122 × 75 mm
Sensor size, to scale
EOS R6 Mark III
35.9 × 23.9 mm · Full Frame
858 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 R6 Mark III
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 R6 Mark III
AF low-light limit
-6.5 EV vs -3 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 600 Mbps — higher is better
Burst (electronic)
40 fps vs 11 fps — higher is better
RAW buffer depth
150 frames vs 44 frames — higher is better
Codecs
Adds CRM, XF-HEVC S, XF-AVC S
AA filter
Only EOS R6 Mark III supports it
Reasons to choose
Alpha 6700
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 122, 69, 75.1
Codecs
Adds XAVC HS, XAVC S, XAVC S-I
Weight
493 g vs 699 g — lower 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 — Both support in-body stabilization
- ✓Weather sealing — Both support weather sealing
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 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
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for vlogging, EOS R6 Mark III or Alpha 6700?
Alpha 6700 scores 10.0/10 versus 5.5/10 for EOS R6 Mark III — Fully articulating screen — see yourself while filming.
What's the resolution difference between the EOS R6 Mark III and Alpha 6700?
EOS R6 Mark III is 32.5 MP and Alpha 6700 is 26 MP, so the EOS R6 Mark III captures more detail for cropping and large prints.
Do the EOS R6 Mark III and Alpha 6700 have in-body image stabilization?
EOS R6 Mark III has 8.5-stop in-body image stabilization, while alpha 6700 has 5-stop in-body image stabilization.
Which shoots faster bursts — the EOS R6 Mark III or the Alpha 6700?
EOS R6 Mark III reaches 40 fps electronic. Alpha 6700 reaches 11 fps electronic.
What's the weight difference between the EOS R6 Mark III and Alpha 6700?
EOS R6 Mark III weighs 699 g and Alpha 6700 weighs 493 g, so the Alpha 6700 is 206 g lighter.
Do the EOS R6 Mark III and Alpha 6700 record 4K video?
EOS R6 Mark III: 4K up to 120p. Alpha 6700: 4K up to 120p.
Are the EOS R6 Mark III and Alpha 6700 weather sealed?
EOS R6 Mark III: Yes. Alpha 6700: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the EOS R6 Mark III and 570 shots for the Alpha 6700, giving the EOS R6 Mark III the edge.
How much does each cost?
EOS R6 Mark III launched at $2,799 and Alpha 6700 at $1,399. The Alpha 6700 is $1,400 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Canon and Sony press materials.