OM System
OM-D E-M10 Mark IV
Entry MFT body with IBIS and approachable controls.
$699
Released Aug 2020
Sony
Alpha 1 II
50MP stacked flagship with 30fps RAW, 8K video, and Sony's fastest hybrid performance.
$6,499
Released Nov 2024
Alpha 1 II is 4.3 years newer.
Wins
OM-D E-M10 Mark IV
Wins
Alpha 1 II
1 categories tied
TL;DR — Key differences
- BAlpha 1 II has higher AF points / zones (759 vs 121)
- BAlpha 1 II has higher 4K max frame rate (120 fps vs 30 fps)
- BAlpha 1 II has higher EVF resolution (9,437,184 vs 2,360,000)
- BAlpha 1 II has higher Resolution (50.1 MP vs 20.3 MP)
- BAlpha 1 II has lower ISO min (native) (100 vs 200)
Key specs at a glance
Size and weight, to scale
OM-D E-M10 Mark IV
122 × 85 × 49 mm
383 g (0.84 lb / 13.51 oz)
Alpha 1 II
136 × 97 × 83 mm
743 g (1.64 lb / 26.21 oz)
OM-D E-M10 Mark IV is 14mm narrower, 12mm shorter, and 34mm thinner than Alpha 1 II.
OM-D E-M10 Mark IV is 360 g lighter than Alpha 1 II.
Depth (front-to-back): 49mm OM-D E-M10 Mark IV · 83mm Alpha 1 II
Sensor size, to scale
OM-D E-M10 Mark IV
17.4 × 13 mm · Compact / large-type
226 mm² area
Alpha 1 II
35.9 × 24 mm · Full Frame
862 mm² area
3.8× 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 1 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
OM-D E-M10 Mark IV
Subject recognition
Adds Face, Eye
Dimensions (W×H×D mm)
Adds 121.7, 84.6, 49
Card types
Adds SD UHS-I
Codecs
Adds MOV
Weight
383 g vs 743 g — lower is better
Battery life (CIPA)
640 shots vs 520 shots — higher is better
Reasons to choose
Alpha 1 II
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
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
EVF resolution
9,437,184 vs 2,360,000 — higher is better
Resolution
50.1 MP vs 20.3 MP — higher is better
Both cameras share
- ✓Eye AF — Both support eye af
- ✓Max video bit rate — Both 150 Mbps
- ✓In-body stabilization — Both support in-body stabilization
- ✓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 1 II
Pros
- ✓50MP stacked sensor
- ✓30fps blackout-free burst
- ✓8K 30p video
- ✓Best Sony AF
Cons
- –Very expensive
- –Complex menus
- –Large files
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for landscape, OM-D E-M10 Mark IV or Alpha 1 II?
Alpha 1 II scores 9.0/10 versus 1.0/10 for OM-D E-M10 Mark IV — 50.1MP — massive detail for large prints.
What's the resolution difference between the OM-D E-M10 Mark IV and Alpha 1 II?
OM-D E-M10 Mark IV is 20.3 MP and Alpha 1 II is 50.1 MP, so the Alpha 1 II captures more detail for cropping and large prints.
Do the OM-D E-M10 Mark IV and Alpha 1 II have in-body image stabilization?
OM-D E-M10 Mark IV has 4.5-stop in-body image stabilization, while alpha 1 II has 8.5-stop in-body image stabilization.
Which shoots faster bursts — the OM-D E-M10 Mark IV or the Alpha 1 II?
OM-D E-M10 Mark IV reaches 15 fps electronic. Alpha 1 II reaches 30 fps electronic.
What's the weight difference between the OM-D E-M10 Mark IV and Alpha 1 II?
OM-D E-M10 Mark IV weighs 383 g and Alpha 1 II weighs 743 g, so the OM-D E-M10 Mark IV is 360 g lighter.
Do the OM-D E-M10 Mark IV and Alpha 1 II record 4K video?
OM-D E-M10 Mark IV: 4K up to 30p. Alpha 1 II: 8K (max), 4K up to 120p.
Are the OM-D E-M10 Mark IV and Alpha 1 II weather sealed?
OM-D E-M10 Mark IV: No. Alpha 1 II: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the OM-D E-M10 Mark IV and 520 shots for the Alpha 1 II, 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 1 II at $6,499. The OM-D E-M10 Mark IV is $5,800 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of OM System and Sony press materials.