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
Sony
Alpha 7 V
33MP partially stacked Exmor RS hybrid with BIONZ XR2 AI, 30fps blackout-free burst, 7.5-stop IBIS, and 4K 60p oversampled from 7K.
$2,899
Launch priceReleased Dec 2025
Alpha 7 V is 5 months newer.
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Wins
OM-3 ASTRO
Wins
Alpha 7 V
3 categories tied
TL;DR — Key differences
- AOM-3 ASTRO has higher Burst (electronic) (120 fps vs 30 fps)
- BAlpha 7 V has higher Max video bit rate (600 Mbps vs 150 Mbps)
- AOM-3 ASTRO has higher ISO max (native) (102,400 vs 51,200)
- BAlpha 7 V has higher 4K max frame rate (120 fps vs 60 fps)
- BAlpha 7 V has higher Card slots (2 vs 1)
Key specs at a glance
Size and weight, to scale
OM-3 ASTRO
139 × 89 × 46 mm
496 g (1.09 lb / 17.50 oz)
Credit card
85.6 × 54 mm
for scale
Alpha 7 V
130 × 96 × 82 mm
695 g (1.53 lb / 24.52 oz)
OM-3 ASTRO is 8mm shorter and 37mm thinner than Alpha 7 V but it is also 9mm wider.
OM-3 ASTRO is 199 g lighter than Alpha 7 V.
Depth (front-to-back): 46mm OM-3 ASTRO · 82mm Alpha 7 V
Back view, to scale
Width × Height — same proportions as the front of the body.
OM-3 ASTRO
139 × 89 mm
Credit card
85.6 × 54 mm
Alpha 7 V
130 × 96 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
OM-3 ASTRO
139 × 46 mm
Credit card
85.6 × 54 mm
Alpha 7 V
130 × 82 mm
Sensor size, to scale
OM-3 ASTRO
17.4 × 13 mm · Compact / large-type
226 mm² area
Alpha 7 V
35.9 × 23.9 mm · Full Frame
858 mm² area
3.8× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
OM-3 ASTRO
Micro Four Thirds
130+
native lenses available
Alpha 7 V
✓ 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-3 ASTRO
AF low-light limit
-8 EV vs -4 EV — lower is better
Subject recognition
Adds People, Birds, Animals…
Dimensions (W×H×D mm)
Adds 139.3, 88.9, 45.8
Burst (electronic)
120 fps vs 30 fps — higher is better
ISO max (native)
102,400 vs 51,200 — higher is better
Card types
Adds SD UHS-I
Codecs
Adds MOV
Weight
496 g vs 695 g — lower is better
Reasons to choose
Alpha 7 V
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 130.3, 96.4, 82.4
Max video bit rate
600 Mbps vs 150 Mbps — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I
AA filter
Only Alpha 7 V supports it
4K max frame rate
120 fps vs 60 fps — higher is better
Internal RAW video
Only Alpha 7 V supports it
Card slots
2 vs 1 — higher is better
Both cameras share
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Burst (mechanical) — Both 10 fps
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
- ✓In-body stabilization — Both support in-body stabilization
- ✓Weather sealing — Both support weather sealing
Pros & cons at a glance
Editorially curated highlights and trade-offs.
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
Alpha 7 V
Pros
- ✓33MP partially stacked sensor — ~4.5× faster readout than α7 IV
- ✓Blackout-free 30 fps with full AF/AE (electronic shutter)
- ✓7.5-stop central / 6.5-stop peripheral IBIS (CIPA 2024)
- ✓759-point phase-detect AF down to EV -4 with AI subject recognition
- ✓7K oversampled 4K 60p (full-frame, no pixel binning) + 4K 120p
- ✓Pre-Capture and dual USB-C (10 Gbps + USB 2.0)
- ✓Up to 16 stops dynamic range
Cons
- –Premium price vs α7 IV
- –4K 120p typically requires APS-C / Super 35 crop
- –Heavier than α7 IV (695 g vs 659 g with battery)
- –Complex menu and feature set
Decided which one is right for you?
Compare live prices for the OM-3 ASTRO and Alpha 7 V at major authorized retailers.
OM System OM-3 ASTRO
Sony Alpha 7 V
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for landscape, OM-3 ASTRO or Alpha 7 V?
Alpha 7 V scores 7.5/10 versus 2.5/10 for OM-3 ASTRO — 33MP — ample resolution.
What's the resolution difference between the OM-3 ASTRO and Alpha 7 V?
OM-3 ASTRO is 20.4 MP and Alpha 7 V is 33 MP, so the Alpha 7 V captures more detail for cropping and large prints.
Do the OM-3 ASTRO and Alpha 7 V have in-body image stabilization?
OM-3 ASTRO has 6.5-stop in-body image stabilization, while alpha 7 V has 7.5-stop in-body image stabilization.
Which shoots faster bursts — the OM-3 ASTRO or the Alpha 7 V?
OM-3 ASTRO reaches 120 fps electronic. Alpha 7 V reaches 30 fps electronic.
What's the weight difference between the OM-3 ASTRO and Alpha 7 V?
OM-3 ASTRO weighs 496 g and Alpha 7 V weighs 695 g, so the OM-3 ASTRO is 199 g lighter.
Do the OM-3 ASTRO and Alpha 7 V record 4K video?
OM-3 ASTRO: 4K up to 60p. Alpha 7 V: 4K up to 120p.
Are the OM-3 ASTRO and Alpha 7 V weather sealed?
OM-3 ASTRO: Yes. Alpha 7 V: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the OM-3 ASTRO and 630 shots for the Alpha 7 V, giving the OM-3 ASTRO the edge.
How much does each cost?
OM-3 ASTRO launched at $2,499 and Alpha 7 V at $2,899. The OM-3 ASTRO is $400 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.
Product images courtesy of OM System and Sony press materials.