OM System
OM-3
Retro-styled MFT body with modern AF and creator-friendly design.
$1,699
Launch priceReleased 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
Launch priceReleased Jul 2025
OM-3 ASTRO is 5 months newer.
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Wins
OM-3
Wins
OM-3 ASTRO
10 categories tied
Which would you choose?
TL;DR — Key differences
- BOM-3 ASTRO has higher 1080p max frame rate (240 fps vs 59.94 fps)
- BOM-3 ASTRO has higher ISO max (native) (102,400 vs 25,600)
- BOM-3 ASTRO has lower ISO min (native) (80 vs 200)
- AOM-3 has higher EVF magnification (1.23 × vs 0.78 ×)
- AOM-3 has higher Max video bit rate (205 Mbps vs 150 Mbps)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to share
OM-3
139 × 89 × 46 mm
413 g (0.91 lb / 14.57 oz)
Credit card
85.6 × 54 mm
for scale
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 is 83 g lighter than OM-3 ASTRO.
Depth (front-to-back): 46mm OM-3 · 46mm OM-3 ASTRO
Back view, to scale
Width × Height — same proportions as the front of the body.
OM-3
139 × 89 mm
Credit card
85.6 × 54 mm
OM-3 ASTRO
139 × 89 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
OM-3
139 × 46 mm
Credit card
85.6 × 54 mm
OM-3 ASTRO
139 × 46 mm
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
Card types
Adds SD, SDHC, SDXC
Headphone jack (3.5mm)
Only OM-3 supports it
EVF magnification
1.23 × vs 0.78 × — higher is better
Max video bit rate
205 Mbps vs 150 Mbps — higher is better
Codecs
Adds MPEG-4 AVC
Weight
413 g vs 496 g — lower is better
Reasons to choose
OM-3 ASTRO
AF low-light limit
-8 EV vs -5.5 EV — lower is better
Card types
Adds SD UHS-II, SD UHS-I
1080p max frame rate
240 fps vs 59.94 fps — higher is better
ISO max (native)
102,400 vs 25,600 — higher is better
ISO min (native)
80 vs 200 — lower is better
4K max frame rate
60 fps vs 59.94 fps — higher is better
Both cameras share
- ✓Resolution — Both 20.4 MP
- ✓AF points / zones — Both 1053
- ✓AF frame coverage — Both 100 %
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Burst (mechanical) — Both 10 fps
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
Decided which one is right for you?
Compare live prices for the OM-3 and OM-3 ASTRO at major authorized retailers.
OM System OM-3
OM System OM-3 ASTRO
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for video, OM-3 or OM-3 ASTRO?
OM-3 ASTRO scores 5.5/10 versus 3.5/10 for OM-3 — 4K recording.
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?
OM-3 weighs 413 g and OM-3 ASTRO weighs 496 g, so the OM-3 is 83 g lighter.
Do the OM-3 and OM-3 ASTRO record 4K video?
OM-3: 4K up to 59.94p. 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.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way OM-3 vs OM-3 ASTRO vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed July 2026.
Product images courtesy of OM System press materials.