Sony
Alpha 9 III
Global shutter sports flagship with 120fps and zero rolling shutter for pro action.
$5,999
Launch priceReleased Jan 2024
Sony
FX9
Full-frame 6K XDCAM camcorder with Dual Base ISO, S-Cinetone, Fast Hybrid AF, variable ND, and oversampled DCI 4K up to 60p.
$10,998
Launch priceReleased Sep 2019
Alpha 9 III is 4.4 years newer.
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Wins
Alpha 9 III
Wins
FX9
3 categories tied
Which would you choose?
TL;DR — Key differences
- AAlpha 9 III has higher Burst (electronic) (120 fps vs 0 fps)
- AAlpha 9 III has higher IBIS effectiveness (8 stops vs 0 stops)
- AAlpha 9 III has higher ISO max (native) (25,600 vs 4,000)
- AAlpha 9 III has lower ISO min (native) (250 vs 800)
- AAlpha 9 III has lower Weight (703 g vs 2000 g)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to shareAlpha 9 III
136 × 97 × 83 mm
703 g (1.55 lb / 24.80 oz)
Credit card
85.6 × 54 mm
for scale
FX9
146 × 143 × 229 mm
2000 g (4.41 lb / 70.55 oz)
Alpha 9 III is 10mm narrower, 46mm shorter, and 146mm thinner than FX9.
Alpha 9 III is 1297 g lighter than FX9.
Depth (front-to-back): 83mm Alpha 9 III · 229mm FX9
Sensor size, to scale
Alpha 9 III
35.6 × 23.8 mm · Full Frame
847 mm² area
FX9
35.7 × 18.8 mm · Full Frame
671 mm² area
1.3× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
Alpha 9 III
✓ more lensesSony E
350+
native lenses available
FX9
✓ 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
Alpha 9 III
Burst (electronic)
120 fps vs 0 fps — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I…
IBIS effectiveness
8 stops vs 0 stops — higher is better
Dimensions (W×H×D mm)
Adds 136.1, 96.9, 82.9
ISO max (native)
25,600 vs 4,000 — higher is better
ISO min (native)
250 vs 800 — lower is better
Subject recognition
Adds Bird, Insect, Car/Train…
Weight
703 g vs 2000 g — lower is better
Reasons to choose
FX9
AF low-light limit
-6 EV vs -5 EV — lower is better
Codecs
Adds XAVC-I, XAVC-L, MPEG HD422
Dimensions (W×H×D mm)
Adds 146, 142.5, 229
Card types
Adds XQD
Both cameras share
- ✓AA filter — Both support aa filter
- ✓AF frame coverage — Both 94 %
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Weather sealing — Both support weather sealing
- ✓Card slots — Both 2
Pros & cons at a glance
Editorially curated highlights and trade-offs.
Alpha 9 III
Pros
- ✓Global shutter 120fps
- ✓Zero rolling shutter
- ✓Pro sports AF
- ✓Pre-capture buffer
Cons
- –24.6MP only
- –Premium price
- –Battery drain at max speed
FX9
Pros
- ✓Full-frame 6K Exmor R oversampling
- ✓Dual Base ISO 800 / 4000
- ✓S-Cinetone + S-Log3
- ✓Built-in variable ND (1/4–1/128)
- ✓12G-SDI + dual XQD slots
Cons
- –Large shoulder-cam form factor
- –Body-only is 2 kg
- –XQD media (not CFexpress)
- –6K not recorded natively (oversampled 4K)
Decided which one is right for you?
Compare live prices for the Alpha 9 III and FX9 at major authorized retailers.
Sony Alpha 9 III
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for wildlife, Alpha 9 III or FX9?
Alpha 9 III scores 9.5/10 versus 3.0/10 for FX9 — 120fps burst captures fleeting moments.
What's the resolution difference between the Alpha 9 III and FX9?
Alpha 9 III is 24.6 MP and FX9 is 20.5 MP, so the Alpha 9 III captures more detail for cropping and large prints.
Do the Alpha 9 III and FX9 have in-body image stabilization?
Alpha 9 III has 8-stop in-body image stabilization, while FX9 does not have IBIS.
What's the weight difference between the Alpha 9 III and FX9?
Alpha 9 III weighs 703 g and FX9 weighs 2000 g, so the Alpha 9 III is 1297 g lighter.
Do the Alpha 9 III and FX9 record 4K video?
Alpha 9 III: 4K up to 120p. FX9: 6K oversampled → DCI 4K / UHD 4K (max), 4K up to 60p.
Are the Alpha 9 III and FX9 weather sealed?
Alpha 9 III: Yes. FX9: Yes.
How much does each cost?
Alpha 9 III launched at $5,999 and FX9 at $10,998. The Alpha 9 III is $4,999 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way Alpha 9 III vs FX9 vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.