OM System
OM-D E-M10 Mark IV
Entry MFT body with IBIS and approachable controls.
$699
Launch priceReleased Aug 2020
Sony
Alpha 9 III
Global shutter sports flagship with 120fps and zero rolling shutter for pro action.
$5,999
Launch priceReleased Jan 2024
Alpha 9 III is 3.4 years newer.
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Wins
OM-D E-M10 Mark IV
Wins
Alpha 9 III
1 categories tied
Which would you choose?
TL;DR — Key differences
- AOM-D E-M10 Mark IV has higher Burst (mechanical) (8.7 fps vs 0 fps)
- BAlpha 9 III has higher Burst (electronic) (120 fps vs 15 fps)
- BAlpha 9 III has higher AF points / zones (759 vs 121)
- BAlpha 9 III has higher 4K max frame rate (120 fps vs 30 fps)
- BAlpha 9 III has higher Max video bit rate (600 Mbps vs 150 Mbps)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to shareOM-D E-M10 Mark IV
122 × 85 × 49 mm
383 g (0.84 lb / 13.51 oz)
Credit card
85.6 × 54 mm
for scale
Alpha 9 III
136 × 97 × 83 mm
703 g (1.55 lb / 24.80 oz)
OM-D E-M10 Mark IV is 14mm narrower, 12mm shorter, and 34mm thinner than Alpha 9 III.
OM-D E-M10 Mark IV is 320 g lighter than Alpha 9 III.
Depth (front-to-back): 49mm OM-D E-M10 Mark IV · 83mm Alpha 9 III
Sensor size, to scale
OM-D E-M10 Mark IV
17.4 × 13 mm · Compact / large-type
226 mm² area
Alpha 9 III
35.6 × 23.8 mm · Full Frame
847 mm² area
3.7× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
OM-D E-M10 Mark IV
Micro Four Thirds
130+
native lenses available
Alpha 9 III
✓ 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
OM-D E-M10 Mark IV
Subject recognition
Adds Face, Eye
Burst (mechanical)
8.7 fps vs 0 fps — higher is better
Dimensions (W×H×D mm)
Adds 121.7, 84.6, 49
Card types
Adds SD UHS-I
Codecs
Adds MOV
Weight
383 g vs 703 g — lower is better
Battery life (CIPA)
640 shots vs 400 shots — higher is better
ISO min (native)
200 vs 250 — lower is better
Reasons to choose
Alpha 9 III
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 136.1, 96.9, 82.9
Card types
Adds CFexpress Type A, SD UHS-II
Burst (electronic)
120 fps vs 15 fps — higher is better
AF points / zones
759 vs 121 — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I…
4K max frame rate
120 fps vs 30 fps — higher is better
Max video bit rate
600 Mbps vs 150 Mbps — higher is better
Both cameras share
- ✓ISO max (native) — Both 25,600
- ✓Eye AF — Both support eye af
- ✓In-body stabilization (IBIS) — Both support in-body stabilization (ibis)
- ✓Touchscreen — Both support touchscreen
- ✓Wi-Fi — Both support wi-fi
- ✓Bluetooth — Both support bluetooth
Pros & cons at a glance
Editorially curated highlights and trade-offs.
OM-D E-M10 Mark IV
Pros
- ✓IBIS at entry price
- ✓Compact
- ✓Easy to use
Cons
- –Older sensor
- –No weather sealing
- –MFT limits
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
Decided which one is right for you?
Compare live prices for the OM-D E-M10 Mark IV and Alpha 9 III at major authorized retailers.
OM System OM-D E-M10 Mark IV
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, OM-D E-M10 Mark IV or Alpha 9 III?
Alpha 9 III scores 9.5/10 versus 1.5/10 for OM-D E-M10 Mark IV — 120fps burst captures fleeting moments.
What's the resolution difference between the OM-D E-M10 Mark IV and Alpha 9 III?
OM-D E-M10 Mark IV is 20.3 MP and Alpha 9 III is 24.6 MP, so the Alpha 9 III captures more detail for cropping and large prints.
Do the OM-D E-M10 Mark IV and Alpha 9 III have in-body image stabilization?
OM-D E-M10 Mark IV has 4.5-stop in-body image stabilization, while Alpha 9 III has 8-stop in-body image stabilization.
Which shoots faster bursts — the OM-D E-M10 Mark IV or the Alpha 9 III?
OM-D E-M10 Mark IV reaches 15 fps electronic. Alpha 9 III reaches 120 fps electronic.
What's the weight difference between the OM-D E-M10 Mark IV and Alpha 9 III?
OM-D E-M10 Mark IV weighs 383 g and Alpha 9 III weighs 703 g, so the OM-D E-M10 Mark IV is 320 g lighter.
Do the OM-D E-M10 Mark IV and Alpha 9 III record 4K video?
OM-D E-M10 Mark IV: 4K up to 30p. Alpha 9 III: 4K up to 120p.
Are the OM-D E-M10 Mark IV and Alpha 9 III weather sealed?
OM-D E-M10 Mark IV: No. Alpha 9 III: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the OM-D E-M10 Mark IV and 400 shots for the Alpha 9 III, giving the OM-D E-M10 Mark IV the edge.
How much does each cost?
OM-D E-M10 Mark IV launched at $699 and Alpha 9 III at $5,999. The OM-D E-M10 Mark IV is $5,300 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way OM-D E-M10 Mark IV vs Alpha 9 III vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.