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
Ricoh
GR IIIx
GR III with a tighter 40mm equivalent GR lens for a natural street, travel, and documentary perspective.
$999
Released Sep 2021
EOS R6 Mark III is 4.1 years newer.
Wins
EOS R6 Mark III
Wins
GR IIIx
1 categories tied
TL;DR — Key differences
- AEOS R6 Mark III has higher AF points / zones (1053 vs 49)
- AEOS R6 Mark III has higher Burst (electronic) (40 fps vs 4 fps)
- AEOS R6 Mark III has higher Battery life (CIPA) (640 shots vs 200 shots)
- AEOS R6 Mark III has higher Burst (mechanical) (12 fps vs 4 fps)
- BGR IIIx has lower Weight (262 g vs 699 g)
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)
GR IIIx
109 × 62 × 35 mm
262 g (0.58 lb / 9.24 oz)
EOS R6 Mark III is 29mm wider, 37mm taller, and 53mm thicker than GR IIIx.
EOS R6 Mark III is 437 g heavier than GR IIIx.
Depth (front-to-back): 88mm EOS R6 Mark III · 35mm GR IIIx
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R6 Mark III
138 × 98 mm
GR IIIx
109 × 62 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
GR IIIx
109 × 35 mm
Sensor size, to scale
EOS R6 Mark III
35.9 × 23.9 mm · Full Frame
858 mm² area
GR IIIx
23.5 × 15.6 mm · APS-C
367 mm² area
2.3× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
EOS R6 Mark III
✓ more lensesCanon RF
105+
native lenses available
GR IIIx: mount data unavailable
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…
Codecs
Adds CRM, XF-HEVC S, XF-AVC S…
Dimensions (W×H×D mm)
Adds 138.4, 98.4, 88.4
Card types
Adds CFexpress Type B, SD UHS-II
AF points / zones
1053 vs 49 — higher is better
Burst (electronic)
40 fps vs 4 fps — higher is better
Battery life (CIPA)
640 shots vs 200 shots — higher is better
Burst (mechanical)
12 fps vs 4 fps — higher is better
Reasons to choose
GR IIIx
Subject recognition
Adds Face, Eye
Codecs
Adds MPEG-4 AVC/H.264, MOV
Dimensions (W×H×D mm)
Adds 109.4, 61.9, 35.2
Card types
Adds SD, SDHC, SDXC UHS-I
Weight
262 g vs 699 g — lower is better
ISO max (native)
102,400 vs 64,000 — higher is better
Both cameras share
- ✓ISO min (native) — Both 100
- ✓Eye AF — Both support eye af
- ✓In-body stabilization — Both support in-body stabilization
- ✓Touchscreen — Both support touchscreen
- ✓Wi-Fi — Both support wi-fi
- ✓Bluetooth — Both support bluetooth
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
GR IIIx
Pros
- ✓40mm equivalent GR lens
- ✓Pocketable APS-C
- ✓3-axis SR
- ✓Snap focus street shooting
Cons
- –Fixed lens
- –No built-in EVF
- –Full HD video only
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, EOS R6 Mark III or GR IIIx?
EOS R6 Mark III scores 8.5/10 versus 0.5/10 for GR IIIx — 40fps burst — pro-level action capture.
What's the resolution difference between the EOS R6 Mark III and GR IIIx?
EOS R6 Mark III is 32.5 MP and GR IIIx is 24.24 MP, so the EOS R6 Mark III captures more detail for cropping and large prints.
Do the EOS R6 Mark III and GR IIIx have in-body image stabilization?
EOS R6 Mark III has 8.5-stop in-body image stabilization, while gR IIIx has in-body image stabilization.
Which shoots faster bursts — the EOS R6 Mark III or the GR IIIx?
EOS R6 Mark III reaches 40 fps electronic. GR IIIx reaches 4 fps electronic.
What's the weight difference between the EOS R6 Mark III and GR IIIx?
EOS R6 Mark III weighs 699 g and GR IIIx weighs 262 g, so the GR IIIx is 437 g lighter.
Do the EOS R6 Mark III and GR IIIx record 4K video?
EOS R6 Mark III: 4K up to 120p. GR IIIx: 4K up to 60p.
Are the EOS R6 Mark III and GR IIIx weather sealed?
EOS R6 Mark III: Yes. GR IIIx: No.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the EOS R6 Mark III and 200 shots for the GR IIIx, giving the EOS R6 Mark III the edge.
How much does each cost?
EOS R6 Mark III launched at $2,799 and GR IIIx at $999. The GR IIIx is $1,800 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Canon and Ricoh press materials.