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OM System OM-3 Astro vs OM System OM-5 Mark II

The OM System OM-3 Astro and the OM System OM-5 Mark II side by side, computed from this guide's catalogue.

Which to pick

On these specs they are close to even: hold both if you can, and let the price, the handling and the lenses you want decide.

Still torn? Ask the guide about the OM System OM-3 Astro and the OM System OM-5 Mark II

Specs side by side

Rows that differ are in full colour; the better value is marked where one is better by any measure.
Spec	OM System OM-3 Astro	OM System OM-5 Mark II
Maker	OM System	OM System
Mount	Micro Four Thirds	Micro Four Thirds
Sensor	Micro Four Thirds, 17.3 x 13 mm	Micro Four Thirds, 17.3 x 13 mm
Crop factor	2×	2×
Resolution	20.4 MP	20.4 MP
Stabilisation	in the body	in the body
Announced	2026	2025
Type	mirrorless camera	mirrorless camera
Weight	not listed	414 g
Lenses in this guide	125 for its sensor	125 for its sensor

Sensor size

Both sensors drawn to the same scale.

Crop factors: OM System OM-3 Astro 2×, OM System OM-5 Mark II 2×.

What a 50mm frames like

Both have the same sensor size, so a 50mm lens frames the same on each: like 100mm on full frame.

Horizontal angle of view on each.

Lenses

Both take Micro Four Thirds lenses, so a lens bought for one works on the other: 125 lenses in this guide cover both sensors.

The OM System OM-3 Astro: 125 Micro Four Thirds lenses in this guide cover its sensor. The OM System OM-5 Mark II: 125 Micro Four Thirds lenses in this guide cover its sensor.