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
Launch priceReleased Nov 2025
Canon
EOS Ra
Astrophotography full-frame RF body with Ha-filter enhancement for nebula and deep-sky imaging.
$2,499
Launch priceReleased Nov 2019
EOS R6 Mark III is 6 years newer.
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Wins
EOS R6 Mark III
Wins
EOS Ra
7 categories tied
Which would you choose?
TL;DR — Key differences
- AEOS R6 Mark III has higher Max video bit rate (2600 Mbps vs 150 Mbps)
- AEOS R6 Mark III has higher Burst (electronic) (40 fps vs 15 fps)
- AEOS R6 Mark III has higher ISO max (native) (64,000 vs 25,600)
- AEOS R6 Mark III has higher RAW buffer depth (150 frames vs 60 frames)
- AEOS R6 Mark III has higher Burst (mechanical) (12 fps vs 6 fps)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to share
EOS R6 Mark III
138 × 98 × 88 mm
699 g (1.54 lb / 24.66 oz)
Credit card
85.6 × 54 mm
for scale
EOS Ra
136 × 98 × 84 mm
660 g (1.46 lb / 23.28 oz)
EOS R6 Mark III is 3mm wider and 4mm thicker than EOS Ra.
EOS R6 Mark III is 39 g heavier than EOS Ra.
Depth (front-to-back): 88mm EOS R6 Mark III · 84mm EOS Ra
Back view, to scale
Width × Height — same proportions as the front of the body.
EOS R6 Mark III
138 × 98 mm
Credit card
85.6 × 54 mm
EOS Ra
136 × 98 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
Credit card
85.6 × 54 mm
EOS Ra
136 × 84 mm
Sensor size, to scale
EOS R6 Mark III
35.9 × 23.9 mm · Full Frame
858 mm² area
EOS Ra
36 × 24 mm · Full Frame
864 mm² area
Lens ecosystem
Native lens selection
EOS R6 Mark III
✓ more lensesCanon RF
105+
native lenses available
EOS Ra
✓ more lensesCanon RF
105+
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 150 Mbps — higher is better
Burst (electronic)
40 fps vs 15 fps — higher is better
ISO max (native)
64,000 vs 25,600 — higher is better
RAW buffer depth
150 frames vs 60 frames — higher is better
Codecs
Adds CRM, XF-HEVC S, XF-AVC S
Burst (mechanical)
12 fps vs 6 fps — higher is better
Reasons to choose
EOS Ra
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 135.8, 98.3, 84.4
Weight
660 g vs 699 g — lower is better
EVF magnification
0.78 × vs 0.76 × — higher is better
Both cameras share
- ✓AA filter — Both support aa filter
- ✓ISO min (native) — Both 100
- ✓AF points / zones — Both 1053
- ✓AF frame coverage — Both 100 %
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
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
EOS Ra
Pros
- ✓Ha-filter enhanced
- ✓30MP full-frame
- ✓RF mount
- ✓Built for astro
Cons
- –Niche use case
- –Not ideal for general photography
- –Discontinued
Decided which one is right for you?
Compare live prices for the EOS R6 Mark III and EOS Ra at major authorized retailers.
Canon EOS R6 Mark III
Canon EOS Ra
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, EOS R6 Mark III or EOS Ra?
EOS R6 Mark III scores 10.0/10 versus 8.5/10 for EOS Ra — 40fps burst — pro-level action capture.
What's the resolution difference between the EOS R6 Mark III and EOS Ra?
EOS R6 Mark III is 32.5 MP and EOS Ra is 30.3 MP, so the EOS R6 Mark III captures more detail for cropping and large prints.
Do the EOS R6 Mark III and EOS Ra have in-body image stabilization?
EOS R6 Mark III has 8.5-stop in-body image stabilization, while EOS Ra has 6-stop in-body image stabilization.
Which shoots faster bursts — the EOS R6 Mark III or the EOS Ra?
EOS R6 Mark III reaches 40 fps electronic. EOS Ra reaches 15 fps electronic.
What's the weight difference between the EOS R6 Mark III and EOS Ra?
EOS R6 Mark III weighs 699 g and EOS Ra weighs 660 g, so the EOS Ra is 39 g lighter.
Do the EOS R6 Mark III and EOS Ra record 4K video?
EOS R6 Mark III: 4K up to 120p. EOS Ra: 4K up to 60p.
Are the EOS R6 Mark III and EOS Ra weather sealed?
EOS R6 Mark III: Yes. EOS Ra: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the EOS R6 Mark III and 640 shots for the EOS Ra, giving the EOS Ra the edge.
How much does each cost?
EOS R6 Mark III launched at $2,799 and EOS Ra at $2,499. The EOS Ra is $300 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way EOS R6 Mark III vs EOS Ra vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.
Product images courtesy of Canon press materials.