OM System
OM-5
Compact weather-sealed MFT for travel and outdoor photography.
$1,199
Released Nov 2022
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 2 years newer.
Wins
OM-5
Wins
Alpha 1 II
3 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)
- AOM-5 has higher ISO max (native) (102,400 vs 32,000)
- BAlpha 1 II has higher Resolution (50.1 MP vs 20.4 MP)
Key specs at a glance
Size and weight, to scale
OM-5
125 × 85 × 50 mm
414 g (0.91 lb / 14.60 oz)
Alpha 1 II
136 × 97 × 83 mm
743 g (1.64 lb / 26.21 oz)
OM-5 is 11mm narrower, 12mm shorter, and 33mm thinner than Alpha 1 II.
OM-5 is 329 g lighter than Alpha 1 II.
Depth (front-to-back): 50mm OM-5 · 83mm Alpha 1 II
Sensor size, to scale
OM-5
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-5
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-5
AF low-light limit
-8 EV vs -4 EV — lower is better
Subject recognition
Adds People, Birds, Animals…
Dimensions (W×H×D mm)
Adds 125.3, 85.2, 49.7
ISO max (native)
102,400 vs 32,000 — higher is better
Card types
Adds SD UHS-I
Weight
414 g vs 743 g — lower is better
Codecs
Adds MOV
ISO min (native)
80 vs 100 — lower 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
AF points / zones
759 vs 121 — higher is better
4K max frame rate
120 fps vs 30 fps — higher is better
EVF resolution
9,437,184 vs 2,360,000 — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I
Resolution
50.1 MP vs 20.4 MP — higher is better
AA filter
Only Alpha 1 II supports it
Both cameras share
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Burst (mechanical) — Both 10 fps
- ✓Burst (electronic) — Both 30 fps
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
- ✓Max video bit rate — Both 150 Mbps
Pros & cons at a glance
Editorially curated highlights and trade-offs.
OM-5
Pros
- ✓Compact
- ✓IP53 sealing
- ✓Computational features
Cons
- –No grip extension
- –MFT sensor
- –Single slot
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-5 or Alpha 1 II?
Alpha 1 II scores 9.0/10 versus 2.5/10 for OM-5 — 50.1MP — massive detail for large prints.
What's the resolution difference between the OM-5 and Alpha 1 II?
OM-5 is 20.4 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-5 and Alpha 1 II have in-body image stabilization?
OM-5 has 6.5-stop in-body image stabilization, while alpha 1 II has 8.5-stop in-body image stabilization.
Which shoots faster bursts — the OM-5 or the Alpha 1 II?
OM-5 reaches 30 fps electronic. Alpha 1 II reaches 30 fps electronic.
What's the weight difference between the OM-5 and Alpha 1 II?
OM-5 weighs 414 g and Alpha 1 II weighs 743 g, so the OM-5 is 329 g lighter.
Do the OM-5 and Alpha 1 II record 4K video?
OM-5: 4K up to 30p. Alpha 1 II: 8K (max), 4K up to 120p.
Are the OM-5 and Alpha 1 II weather sealed?
OM-5: Yes. Alpha 1 II: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the OM-5 and 520 shots for the Alpha 1 II, giving the OM-5 the edge.
How much does each cost?
OM-5 launched at $1,199 and Alpha 1 II at $6,499. The OM-5 is $5,300 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.