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 99 II
42MP A-mount flagship with translucent mirror, 12fps, and 5-axis IBIS for Sony/Minolta lenses.
$3,199
Launch priceReleased Nov 2016
EOS R6 Mark III is 9 years newer.
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Wins
EOS R6 Mark III
Wins
Alpha 99 II
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)
- AEOS R6 Mark III has higher IBIS effectiveness (8.5 stops vs 4.5 stops)
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 99 II
143 × 105 × 82 mm
849 g (1.87 lb / 29.95 oz)
EOS R6 Mark III is 4mm narrower and 6mm shorter than Alpha 99 II but it is also 7mm thicker.
EOS R6 Mark III is 150 g lighter than Alpha 99 II.
Depth (front-to-back): 88mm EOS R6 Mark III · 82mm Alpha 99 II
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 99 II
143 × 105 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 99 II
143 × 82 mm
Sensor size, to scale
EOS R6 Mark III
35.9 × 23.9 mm · Full Frame
858 mm² area
Alpha 99 II
35.9 × 24 mm · Full Frame
862 mm² area
Lens ecosystem
Native lens selection
EOS R6 Mark III
✓ more lensesCanon RF
105+
native lenses available
Alpha 99 II: 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
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
Burst (electronic)
40 fps vs 20 fps — higher is better
4K max frame rate
120 fps vs 60 fps — higher is better
Reasons to choose
Alpha 99 II
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 142.6, 104.8, 81.6
Resolution
42.4 MP vs 32.5 MP — higher 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
- ✓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)
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 99 II
Pros
- ✓42MP A-mount
- ✓5-axis IBIS
- ✓12fps
- ✓Huge Minolta lens library
Cons
- –A-mount declining
- –Translucent mirror system
- –Large body
Decided which one is right for you?
Compare live prices for the EOS R6 Mark III and Alpha 99 II at major authorized retailers.
Canon EOS R6 Mark III
Sony Alpha 99 II
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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 99 II?
Alpha 99 II 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 99 II?
EOS R6 Mark III is 32.5 MP and Alpha 99 II is 42.4 MP, so the Alpha 99 II captures more detail for cropping and large prints.
Do the EOS R6 Mark III and Alpha 99 II have in-body image stabilization?
EOS R6 Mark III has 8.5-stop in-body image stabilization, while Alpha 99 II has 4.5-stop in-body image stabilization.
Which shoots faster bursts — the EOS R6 Mark III or the Alpha 99 II?
EOS R6 Mark III reaches 40 fps electronic. Alpha 99 II reaches 20 fps electronic.
What's the weight difference between the EOS R6 Mark III and Alpha 99 II?
EOS R6 Mark III weighs 699 g and Alpha 99 II weighs 849 g, so the EOS R6 Mark III is 150 g lighter.
Do the EOS R6 Mark III and Alpha 99 II record 4K video?
EOS R6 Mark III: 4K up to 120p. Alpha 99 II: 4K up to 60p.
Are the EOS R6 Mark III and Alpha 99 II weather sealed?
EOS R6 Mark III: Yes. Alpha 99 II: 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 99 II, giving the Alpha 99 II the edge.
How much does each cost?
EOS R6 Mark III launched at $2,799 and Alpha 99 II at $3,199. The EOS R6 Mark III is $400 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way EOS R6 Mark III vs Alpha 99 II 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.