Nikon
Z9
Flagship stacked mirrorless with 45MP, 8K video, and no mechanical shutter.
$5,899
Released Oct 2021
Sony
Alpha 9 II
24MP sports body with 20fps and proven pro workflow.
$4,499
Released Oct 2019
Z9 is 2.1 years newer.
Wins
Z9
Wins
Alpha 9 II
1 categories tied
TL;DR — Key differences
- BAlpha 9 II has higher Burst (mechanical) (10 fps vs 0 fps)
- AZ9 has higher RAW buffer depth (1000 frames vs 120 frames)
- AZ9 has higher Burst (electronic) (120 fps vs 20 fps)
- AZ9 has higher 4K max frame rate (120 fps vs 30 fps)
- BAlpha 9 II 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
1340 g (2.95 lb / 47.27 oz)
Alpha 9 II
129 × 96 × 78 mm
678 g (1.49 lb / 23.92 oz)
Z9 is 20mm wider, 53mm taller, and 13mm thicker than Alpha 9 II.
Z9 is 662 g heavier than Alpha 9 II.
Depth (front-to-back): 91mm Z9 · 78mm Alpha 9 II
Back view, to scale
Width × Height — same proportions as the front of the body.
Z9
149 × 150 mm
Alpha 9 II
129 × 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 II
129 × 78 mm
Sensor size, to scale
Z9
35.9 × 23.9 mm · Full Frame
858 mm² area
Alpha 9 II
35.6 × 23.8 mm · Full Frame
847 mm² area
Lens ecosystem
Native lens selection
Z9
Nikon Z
90+
native lenses available
Alpha 9 II
✓ 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
RAW buffer depth
1000 frames vs 120 frames — higher is better
Burst (electronic)
120 fps vs 20 fps — higher is better
4K max frame rate
120 fps vs 30 fps — higher is better
Reasons to choose
Alpha 9 II
Subject recognition
Adds Human, Animal
Burst (mechanical)
10 fps vs 0 fps — higher is better
Codecs
Adds XAVC S, AVCHD, H.264
Dimensions (W×H×D mm)
Adds 128.9, 96.4, 77.5
Card types
Adds SD UHS-II, SD UHS-II
AA filter
Only Alpha 9 II supports it
ISO max (native)
51,200 vs 25,600 — higher is better
Weight
678 g vs 1340 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 II
Pros
- ✓20fps silent burst
- ✓Sports AF
- ✓Dual slots
Cons
- –24MP resolution
- –Older than A9 III
- –No global shutter
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for video, Z9 or Alpha 9 II?
Z9 scores 9.5/10 versus 5.0/10 for Alpha 9 II — 8K recording for future-proof footage.
What's the resolution difference between the Z9 and Alpha 9 II?
Z9 is 45.7 MP and Alpha 9 II is 24.2 MP, so the Z9 captures more detail for cropping and large prints.
Do the Z9 and Alpha 9 II have in-body image stabilization?
Z9 has 6-stop in-body image stabilization, while alpha 9 II has 5.5-stop in-body image stabilization.
Which shoots faster bursts — the Z9 or the Alpha 9 II?
Z9 reaches 120 fps electronic. Alpha 9 II reaches 20 fps electronic.
What's the weight difference between the Z9 and Alpha 9 II?
Z9 weighs 1340 g and Alpha 9 II weighs 678 g, so the Alpha 9 II is 662 g lighter.
Do the Z9 and Alpha 9 II record 4K video?
Z9: 8K UHD (max), 4K up to 120p. Alpha 9 II: 4K up to 30p.
Are the Z9 and Alpha 9 II weather sealed?
Z9: Yes. Alpha 9 II: Yes.
Which has better battery life?
Rated battery life is 740 shots (CIPA) for the Z9 and 690 shots for the Alpha 9 II, giving the Z9 the edge.
How much does each cost?
Z9 launched at $5,899 and Alpha 9 II at $4,499. The Alpha 9 II is $1,400 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Nikon and Sony press materials.