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
FX3
Compact full-frame cinema line camera with S-Cinetone and pro video ergonomics.
$3,899
Released Feb 2021
EOS R6 Mark III is 4.7 years newer.
Wins
EOS R6 Mark III
Wins
FX3
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 10 fps)
- AEOS R6 Mark III has higher Resolution (32.5 MP vs 12.1 MP)
- AEOS R6 Mark III has higher AF points / zones (1053 vs 627)
- BFX3 has higher ISO max (native) (102,400 vs 64,000)
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)
FX3
130 × 78 × 85 mm
715 g (1.58 lb / 25.22 oz)
EOS R6 Mark III is 9mm wider, 21mm taller, and 4mm thicker than FX3.
EOS R6 Mark III is 16 g lighter than FX3.
Depth (front-to-back): 88mm EOS R6 Mark III · 85mm FX3
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R6 Mark III
138 × 98 mm
FX3
130 × 78 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
FX3
130 × 85 mm
Sensor size, to scale
EOS R6 Mark III
35.9 × 23.9 mm · Full Frame
858 mm² area
FX3
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
FX3
✓ 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
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 10 fps — higher is better
Resolution
32.5 MP vs 12.1 MP — higher is better
Codecs
Adds CRM, XF-HEVC S, XF-AVC S
AF low-light limit
-6.5 EV vs -6 EV — lower is better
Pre-Capture / Pre-Release
Only EOS R6 Mark III supports it
Reasons to choose
FX3
Subject recognition
Adds Human, Animal
Dimensions (W×H×D mm)
Adds 129.7, 77.8, 84.5
Codecs
Adds XAVC HS, XAVC S, XAVC S-I
Card types
Adds CFexpress Type A
ISO max (native)
102,400 vs 64,000 — higher is better
ISO min (native)
80 vs 100 — lower is better
Both cameras share
- ✓AA filter — Both support aa filter
- ✓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
- ✓In-body stabilization — Both support in-body stabilization
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
FX3
Pros
- ✓Cinema form factor
- ✓S-Log3 / S-Cinetone
- ✓Compact for gimbals
- ✓Full-frame sensor
Cons
- –No EVF
- –Still photo ergonomics limited
- –Single card slot
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, EOS R6 Mark III or FX3?
EOS R6 Mark III scores 8.5/10 versus 4.0/10 for FX3 — 40fps burst — pro-level action capture.
What's the resolution difference between the EOS R6 Mark III and FX3?
EOS R6 Mark III is 32.5 MP and FX3 is 12.1 MP, so the EOS R6 Mark III captures more detail for cropping and large prints.
Do the EOS R6 Mark III and FX3 have in-body image stabilization?
EOS R6 Mark III has 8.5-stop in-body image stabilization, while fX3 has 5.5-stop in-body image stabilization.
Which shoots faster bursts — the EOS R6 Mark III or the FX3?
EOS R6 Mark III reaches 40 fps electronic. FX3 reaches 10 fps electronic.
What's the weight difference between the EOS R6 Mark III and FX3?
EOS R6 Mark III weighs 699 g and FX3 weighs 715 g, so the EOS R6 Mark III is 16 g lighter.
Do the EOS R6 Mark III and FX3 record 4K video?
EOS R6 Mark III: 4K up to 120p. FX3: 4K up to 120p.
Are the EOS R6 Mark III and FX3 weather sealed?
EOS R6 Mark III: Yes. FX3: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the EOS R6 Mark III and 580 shots for the FX3, giving the EOS R6 Mark III the edge.
How much does each cost?
EOS R6 Mark III launched at $2,799 and FX3 at $3,899. The EOS R6 Mark III is $1,100 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Canon and Sony press materials.