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
Sony
Alpha 7R
36MP no-AA-filter full-frame mirrorless for landscape and studio — launched the high-res mirrorless era.
$2,299
Launch priceReleased Oct 2013
EOS R6 Mark III is 12.1 years newer.
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Wins
EOS R6 Mark III
Wins
Alpha 7R
5 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 ISO max (native) (64,000 vs 25,600)
- AEOS R6 Mark III has higher Burst (electronic) (40 fps vs 20 fps)
- AEOS R6 Mark III has higher 4K max frame rate (120 fps vs 60 fps)
- BAlpha 7R has lower Weight (465 g vs 699 g)
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
Alpha 7R
127 × 94 × 48 mm
465 g (1.03 lb / 16.40 oz)
EOS R6 Mark III is 12mm wider, 4mm taller, and 40mm thicker than Alpha 7R.
EOS R6 Mark III is 234 g heavier than Alpha 7R.
Depth (front-to-back): 88mm EOS R6 Mark III · 48mm Alpha 7R
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
Alpha 7R
127 × 94 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
Alpha 7R
127 × 48 mm
Sensor size, to scale
EOS R6 Mark III
35.9 × 23.9 mm · Full Frame
858 mm² area
Alpha 7R
35.9 × 24 mm · Full Frame
862 mm² area
Lens ecosystem
Native lens selection
EOS R6 Mark III
Canon RF
105+
native lenses available
Alpha 7R
✓ 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 -4 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 150 Mbps — higher is better
ISO max (native)
64,000 vs 25,600 — higher is better
Codecs
Adds CRM, XF-HEVC S, XF-AVC S
AA filter
Only EOS R6 Mark III supports it
Burst (electronic)
40 fps vs 20 fps — higher is better
Reasons to choose
Alpha 7R
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 126.9, 94.4, 48.2
Weight
465 g vs 699 g — lower is better
Resolution
36.4 MP vs 32.5 MP — higher is better
EVF magnification
0.78 × vs 0.76 × — 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
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
- ✓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 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 7R
Pros
- ✓36MP no AA filter
- ✓Compact high-res body
- ✓Historic significance
- ✓Great used value
Cons
- –Slow AF
- –No IBIS
- –Very dated ergonomics
Decided which one is right for you?
Compare live prices for the EOS R6 Mark III and Alpha 7R at major authorized retailers.
Canon EOS R6 Mark III
Sony Alpha 7R
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for wildlife, EOS R6 Mark III or Alpha 7R?
Alpha 7R scores 9.0/10 versus 6.5/10 for EOS R6 Mark III — 20fps burst captures fleeting moments.
What's the resolution difference between the EOS R6 Mark III and Alpha 7R?
EOS R6 Mark III is 32.5 MP and Alpha 7R is 36.4 MP, so the Alpha 7R captures more detail for cropping and large prints.
Do the EOS R6 Mark III and Alpha 7R have in-body image stabilization?
EOS R6 Mark III has 8.5-stop in-body image stabilization, while Alpha 7R has 7-stop in-body image stabilization.
Which shoots faster bursts — the EOS R6 Mark III or the Alpha 7R?
EOS R6 Mark III reaches 40 fps electronic. Alpha 7R reaches 20 fps electronic.
What's the weight difference between the EOS R6 Mark III and Alpha 7R?
EOS R6 Mark III weighs 699 g and Alpha 7R weighs 465 g, so the Alpha 7R is 234 g lighter.
Do the EOS R6 Mark III and Alpha 7R record 4K video?
EOS R6 Mark III: 4K up to 120p. Alpha 7R: 4K up to 60p.
Are the EOS R6 Mark III and Alpha 7R weather sealed?
EOS R6 Mark III: Yes. Alpha 7R: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the EOS R6 Mark III and 640 shots for the Alpha 7R, giving the Alpha 7R the edge.
How much does each cost?
EOS R6 Mark III launched at $2,799 and Alpha 7R at $2,299. The Alpha 7R is $500 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way EOS R6 Mark III vs Alpha 7R vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.
Product images courtesy of Canon and Sony press materials.