Nikon
Z9
Flagship stacked mirrorless with 45MP, 8K video, and no mechanical shutter.
$5,499
Launch priceReleased Oct 2021
Sony
Alpha 9
First stacked-sensor mirrorless sports camera with 20fps blackout-free shooting.
$4,499
Launch priceReleased Apr 2017
Z9 is 4.5 years newer.
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Wins
Z9
Wins
Alpha 9
1 categories tied
TL;DR — Key differences
- BAlpha 9 has higher Burst (mechanical) (5 fps vs 0 fps)
- AZ9 has higher Burst (electronic) (120 fps vs 20 fps)
- AZ9 has higher RAW buffer depth (1000 frames vs 200 frames)
- AZ9 has higher 4K max frame rate (120 fps vs 30 fps)
- BAlpha 9 has higher ISO max (native) (51,200 vs 25,600)
Key specs at a glance
Size and weight, to scale
Z9
149 × 150 × 91 mm
1160 g (2.56 lb / 40.92 oz)
Alpha 9
127 × 96 × 63 mm
673 g (1.48 lb / 23.74 oz)
Z9 is 22mm wider, 54mm taller, and 28mm thicker than Alpha 9.
Z9 is 487 g heavier than Alpha 9.
Depth (front-to-back): 91mm Z9 · 63mm Alpha 9
Back view, to scale
Width × Height — same proportions as the front of the body.
Z9
149 × 150 mm
Alpha 9
127 × 96 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
Z9
149 × 91 mm
Alpha 9
127 × 63 mm
Sensor size, to scale
Z9
35.9 × 23.9 mm · Full Frame
858 mm² area
Alpha 9
35.6 × 23.8 mm · Full Frame
847 mm² area
Lens ecosystem
Native lens selection
Z9
Nikon Z
90+
native lenses available
Alpha 9
✓ 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
Z9
AF low-light limit
-8.5 EV vs -3 EV — lower is better
Subject recognition
Adds People, Birds, Dogs…
Codecs
Adds N-RAW, ProRes RAW HQ, ProRes 422 HQ…
Dimensions (W×H×D mm)
Adds 149, 149.5, 90.5
Card types
Adds CFexpress Type B / XQD, CFexpress Type B / XQD
Burst (electronic)
120 fps vs 20 fps — higher is better
RAW buffer depth
1000 frames vs 200 frames — higher is better
4K max frame rate
120 fps vs 30 fps — higher is better
Reasons to choose
Alpha 9
Subject recognition
Adds Human, Animal
Burst (mechanical)
5 fps vs 0 fps — higher is better
Codecs
Adds XAVC S, AVCHD, H.264
Dimensions (W×H×D mm)
Adds 126.9, 95.6, 63
Card types
Adds SD UHS-II, SD UHS-I
AA filter
Only Alpha 9 supports it
ISO max (native)
51,200 vs 25,600 — higher is better
Weight
673 g vs 1160 g — lower is better
Both cameras share
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓In-body stabilization — Both support in-body stabilization
- ✓Weather sealing — Both support weather sealing
- ✓Card slots — Both 2
- ✓Touchscreen — Both support touchscreen
Pros & cons at a glance
Editorially curated highlights and trade-offs.
Z9
Pros
- ✓45MP stacked
- ✓8K 60p internal
- ✓120fps stills
- ✓Pro build
Cons
- –Heavy body
- –Expensive
- –Large files
Alpha 9
Pros
- ✓Stacked sensor pioneer
- ✓20fps silent burst
- ✓Pro sports AF
Cons
- –Superseded by A9 II/III
- –24MP
- –Expensive when new
Decided which one is right for you?
Compare live prices for the Z9 and Alpha 9 at major authorized retailers.
Sony Alpha 9
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for video, Z9 or Alpha 9?
Z9 scores 9.5/10 versus 5.0/10 for Alpha 9 — 8K recording for future-proof footage.
What's the resolution difference between the Z9 and Alpha 9?
Z9 is 45.7 MP and Alpha 9 is 24.2 MP, so the Z9 captures more detail for cropping and large prints.
Do the Z9 and Alpha 9 have in-body image stabilization?
Z9 has 6-stop in-body image stabilization, while alpha 9 has 5-stop in-body image stabilization.
Which shoots faster bursts — the Z9 or the Alpha 9?
Z9 reaches 120 fps electronic. Alpha 9 reaches 20 fps electronic.
What's the weight difference between the Z9 and Alpha 9?
Z9 weighs 1160 g and Alpha 9 weighs 673 g, so the Alpha 9 is 487 g lighter.
Do the Z9 and Alpha 9 record 4K video?
Z9: 8K UHD (max), 4K up to 120p. Alpha 9: 4K up to 30p.
Are the Z9 and Alpha 9 weather sealed?
Z9: Yes. Alpha 9: Yes.
Which has better battery life?
Rated battery life is 740 shots (CIPA) for the Z9 and 650 shots for the Alpha 9, giving the Z9 the edge.
How much does each cost?
Z9 launched at $5,499 and Alpha 9 at $4,499. The Alpha 9 is $1,000 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Nikon and Sony press materials.