Sony
Alpha 9 III
Global shutter sports flagship with 120fps and zero rolling shutter for pro action.
$5,999
Launch priceReleased Jan 2024
Sony
RX10 IV
1-inch bridge with 24–600mm f/2.4–4 zoom, 24fps AF tracking, and pro video features.
$1,699
Launch priceReleased Sep 2017
Alpha 9 III is 6.3 years newer.
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Wins
Alpha 9 III
Wins
RX10 IV
4 categories tied
Which would you choose?
TL;DR — Key differences
- BRX10 IV has higher Burst (mechanical) (6 fps vs 0 fps)
- AAlpha 9 III has higher Burst (electronic) (120 fps vs 15 fps)
- AAlpha 9 III has higher Max video bit rate (600 Mbps vs 150 Mbps)
- AAlpha 9 III has higher RAW buffer depth (200 frames vs 60 frames)
- BRX10 IV has lower ISO min (native) (100 vs 250)
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
RX10 IV
133 × 94 × 131 mm
1095 g (2.41 lb / 38.63 oz)
Alpha 9 III is 48mm thinner than RX10 IV but it is also 3mm wider and 3mm taller.
Alpha 9 III is 392 g lighter than RX10 IV.
Depth (front-to-back): 83mm Alpha 9 III · 131mm RX10 IV
Sensor size, to scale
Alpha 9 III
35.6 × 23.8 mm · Full Frame
847 mm² area
RX10 IV
13.2 × 8.8 mm · 1-inch
116 mm² area
7.3× 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
RX10 IV: 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
Alpha 9 III
AF low-light limit
-5 EV vs -4 EV — lower is better
Dimensions (W×H×D mm)
Adds 136.1, 96.9, 82.9
Burst (electronic)
120 fps vs 15 fps — higher is better
Max video bit rate
600 Mbps vs 150 Mbps — higher is better
RAW buffer depth
200 frames vs 60 frames — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I
Subject recognition
Adds Insect, Car/Train, Airplane
4K max frame rate
120 fps vs 60 fps — higher is better
Reasons to choose
RX10 IV
Burst (mechanical)
6 fps vs 0 fps — higher is better
Dimensions (W×H×D mm)
Adds 133.1, 94.1, 131.2
ISO min (native)
100 vs 250 — lower is better
Battery life (CIPA)
640 shots vs 400 shots — higher is better
Subject recognition
Adds Vehicle
Both cameras share
- ✓AA filter — Both support aa filter
- ✓ISO max (native) — Both 25,600
- ✓AF points / zones — Both 759
- ✓AF frame coverage — Both 94 %
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
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
RX10 IV
Pros
- ✓24–600mm reach
- ✓24fps with AF
- ✓Weather sealed
- ✓Strong all-in-one travel camera
Cons
- –1-inch sensor
- –Large bridge body
- –Expensive for sensor size
Decided which one is right for you?
Compare live prices for the Alpha 9 III and RX10 IV at major authorized retailers.
Sony Alpha 9 III
Sony RX10 IV
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for portraits, Alpha 9 III or RX10 IV?
Alpha 9 III scores 7.5/10 versus 4.0/10 for RX10 IV — 24.6MP — solid resolution.
What's the resolution difference between the Alpha 9 III and RX10 IV?
Alpha 9 III is 24.6 MP and RX10 IV is 20.1 MP, so the Alpha 9 III captures more detail for cropping and large prints.
Do the Alpha 9 III and RX10 IV have in-body image stabilization?
Alpha 9 III has 8-stop in-body image stabilization, while RX10 IV has 6-stop in-body image stabilization.
Which shoots faster bursts — the Alpha 9 III or the RX10 IV?
Alpha 9 III reaches 120 fps electronic. RX10 IV reaches 15 fps electronic.
What's the weight difference between the Alpha 9 III and RX10 IV?
Alpha 9 III weighs 703 g and RX10 IV weighs 1095 g, so the Alpha 9 III is 392 g lighter.
Do the Alpha 9 III and RX10 IV record 4K video?
Alpha 9 III: 4K up to 120p. RX10 IV: 4K up to 60p.
Are the Alpha 9 III and RX10 IV weather sealed?
Alpha 9 III: Yes. RX10 IV: Yes.
Which has better battery life?
Rated battery life is 400 shots (CIPA) for the Alpha 9 III and 640 shots for the RX10 IV, giving the RX10 IV the edge.
How much does each cost?
Alpha 9 III launched at $5,999 and RX10 IV at $1,699. The RX10 IV is $4,300 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way Alpha 9 III vs RX10 IV vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.