OM System
OM-3
Retro-styled MFT body with modern AF and creator-friendly design.
$1,699
Released Jan 2025
OM System
OM-3 ASTRO
Astrophotography-focused OM-3 variant with 20.4MP stacked sensor, H-alpha-friendly filter tuning, IP53 sealing, and 7.5-stop Sync IS.
$2,499
Released Jul 2025
OM-3 ASTRO is 5 months newer.
Wins
OM-3
Wins
OM-3 ASTRO
17 categories tied
Key specs at a glance
Size and weight, to scale
OM-3
139 × 89 × 46 mm
496 g (1.09 lb / 17.50 oz)
OM-3 ASTRO
139 × 89 × 46 mm
496 g (1.09 lb / 17.50 oz)
OM-3 and OM-3 ASTRO share virtually identical body dimensions.
OM-3 and OM-3 ASTRO weigh the same.
Depth (front-to-back): 46mm OM-3 · 46mm OM-3 ASTRO
Sensor size, to scale
OM-3
17.4 × 13 mm · Compact / large-type
226 mm² area
OM-3 ASTRO
17.4 × 13 mm · Compact / large-type
226 mm² area
Lens ecosystem
Native lens selection
OM-3
✓ more lensesMicro Four Thirds
130+
native lenses available
OM-3 ASTRO
✓ more lensesMicro Four Thirds
130+
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-3
No major advantages on measured specs.
Reasons to choose
OM-3 ASTRO
No major advantages on measured specs.
Both cameras share
- ✓Resolution — Both 20.4 MP
- ✓ISO min (native) — Both 80
- ✓ISO max (native) — Both 102,400
- ✓AF points / zones — Both 1053
- ✓AF frame coverage — Both 100 %
- ✓Eye AF — Both support eye af
Pros & cons at a glance
Editorially curated highlights and trade-offs.
OM-3
Pros
- ✓Retro design
- ✓Modern AF
- ✓Compact
Cons
- –MFT sensor
- –Premium for MFT
- –Smaller lens selection
OM-3 ASTRO
Pros
- ✓Astro-tuned sensor filter
- ✓20.4MP stacked BSI Live MOS
- ✓IP53 weather sealing
- ✓7.5-stop Sync IS
Cons
- –Specialized astro variant
- –Micro Four Thirds sensor
- –Premium price
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, OM-3 or OM-3 ASTRO?
OM-3 scores 8.5/10 versus 8.5/10 for OM-3 ASTRO — 120fps burst — pro-level action capture.
What's the resolution difference between the OM-3 and OM-3 ASTRO?
Both cameras share the same 20.4 MP resolution.
Do the OM-3 and OM-3 ASTRO have in-body image stabilization?
OM-3 has 6.5-stop in-body image stabilization, while oM-3 ASTRO has 6.5-stop in-body image stabilization.
Which shoots faster bursts — the OM-3 or the OM-3 ASTRO?
OM-3 reaches 120 fps electronic. OM-3 ASTRO reaches 120 fps electronic.
What's the weight difference between the OM-3 and OM-3 ASTRO?
Both bodies weigh roughly 496 g.
Do the OM-3 and OM-3 ASTRO record 4K video?
OM-3: 4K up to 60p. OM-3 ASTRO: 4K up to 60p.
Are the OM-3 and OM-3 ASTRO weather sealed?
OM-3: Yes. OM-3 ASTRO: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the OM-3 and 640 shots for the OM-3 ASTRO, giving the OM-3 ASTRO the edge.
How much does each cost?
OM-3 launched at $1,699 and OM-3 ASTRO at $2,499. The OM-3 is $800 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.