OM System
OM-1 II
Flagship MFT with stacked sensor, 120fps, and pro wildlife features.
$2,399
Launch priceReleased Feb 2024
Ricoh
GR III
Street photography icon with 24.24MP APS-C, 28mm equivalent GR lens, 3-axis SR, and snap-focus in a pocket body.
$899
Launch priceReleased Mar 2019
OM-1 II is 4.9 years newer.
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Wins
OM-1 II
Wins
GR III
3 categories tied
Which would you choose?
TL;DR — Key differences
- AOM-1 II has higher Burst (electronic) (120 fps vs 4 fps)
- AOM-1 II has higher AF points / zones (1053 vs 49)
- AOM-1 II has higher 1080p max frame rate (240 fps vs 60 fps)
- AOM-1 II has higher Battery life (CIPA) (520 shots vs 200 shots)
- AOM-1 II has higher Burst (mechanical) (10 fps vs 4 fps)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to shareOM-1 II
135 × 92 × 73 mm
599 g (1.32 lb / 21.13 oz)
Credit card
85.6 × 54 mm
for scale
GR III
109 × 62 × 33 mm
257 g (0.57 lb / 9.07 oz)
OM-1 II is 25mm wider, 30mm taller, and 40mm thicker than GR III.
OM-1 II is 342 g heavier than GR III.
Depth (front-to-back): 73mm OM-1 II · 33mm GR III
Sensor size, to scale
OM-1 II
17.4 × 13 mm · Compact / large-type
226 mm² area
GR III
23.5 × 15.6 mm · APS-C
367 mm² area
1.6× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
OM-1 II
✓ more lensesMicro Four Thirds
130+
native lenses available
GR III: mount data unavailable
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-1 II
Subject recognition
Adds People, Birds, Animals…
Dimensions (W×H×D mm)
Adds 134.8, 91.6, 72.7
Card types
Adds SD UHS-II, SD UHS-I
Burst (electronic)
120 fps vs 4 fps — higher is better
AF points / zones
1053 vs 49 — higher is better
1080p max frame rate
240 fps vs 60 fps — higher is better
Codecs
Adds H.264, H.265
Battery life (CIPA)
520 shots vs 200 shots — higher is better
Reasons to choose
GR III
Subject recognition
Adds Face, Eye
Dimensions (W×H×D mm)
Adds 109.4, 61.9, 33.2
Card types
Adds SD, SDHC, SDXC UHS-I
Weight
257 g vs 599 g — lower is better
Codecs
Adds MPEG-4 AVC/H.264
Resolution
24.24 MP vs 20.4 MP — higher is better
Both cameras share
- ✓ISO max (native) — Both 102,400
- ✓Eye AF — Both support eye af
- ✓4K max frame rate — Both 60 fps
- ✓In-body stabilization (IBIS) — Both support in-body stabilization (ibis)
- ✓Card slots — Both 1
- ✓Touchscreen — Both support touchscreen
Pros & cons at a glance
Editorially curated highlights and trade-offs.
OM-1 II
Pros
- ✓120fps stills
- ✓Stacked MFT
- ✓IP53 weather sealing
- ✓Computational features
Cons
- –MFT sensor size
- –Smaller ecosystem
- –Menu complexity
GR III
Pros
- ✓Pocketable APS-C
- ✓28mm equivalent GR lens
- ✓3-axis sensor-shift SR
- ✓Snap focus street shooting
Cons
- –Fixed lens
- –No built-in EVF
- –Full HD video only
Decided which one is right for you?
Compare live prices for the OM-1 II and GR III at major authorized retailers.
OM System OM-1 II
Ricoh GR III
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, OM-1 II or GR III?
OM-1 II scores 10.0/10 versus 1.5/10 for GR III — 120fps burst — pro-level action capture.
What's the resolution difference between the OM-1 II and GR III?
OM-1 II is 20.4 MP and GR III is 24.24 MP, so the GR III captures more detail for cropping and large prints.
Do the OM-1 II and GR III have in-body image stabilization?
OM-1 II has 8.5-stop in-body image stabilization, while GR III has in-body image stabilization.
Which shoots faster bursts — the OM-1 II or the GR III?
OM-1 II reaches 120 fps electronic. GR III reaches 4 fps electronic.
What's the weight difference between the OM-1 II and GR III?
OM-1 II weighs 599 g and GR III weighs 257 g, so the GR III is 342 g lighter.
Do the OM-1 II and GR III record 4K video?
OM-1 II: 4K up to 60p. GR III: 4K up to 60p.
Are the OM-1 II and GR III weather sealed?
OM-1 II: Yes. GR III: No.
Which has better battery life?
Rated battery life is 520 shots (CIPA) for the OM-1 II and 200 shots for the GR III, giving the OM-1 II the edge.
How much does each cost?
OM-1 II launched at $2,399 and GR III at $899. The GR III is $1,500 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way OM-1 II vs GR III vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed July 2026.