OM System
OM-1 II
Flagship MFT with stacked sensor, 120fps, and pro wildlife features.
$2,399
Launch priceReleased Feb 2024
Pentax
K-1
Original 36MP full-frame Pentax DSLR with 5-axis SR, AA filter simulator, and weather sealing.
$1,799
Launch priceReleased Apr 2016
OM-1 II is 7.8 years newer.
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Wins
OM-1 II
Wins
K-1
5 categories tied
Which would you choose?
TL;DR — Key differences
- AOM-1 II has higher AF points / zones (1053 vs 101)
- AOM-1 II has higher Burst (electronic) (120 fps vs 20 fps)
- AOM-1 II has higher ISO max (native) (102,400 vs 25,600)
- BK-1 has higher Card slots (2 vs 1)
- BK-1 has higher Resolution (36.4 MP vs 20.4 MP)
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
K-1
137 × 111 × 87 mm
1010 g (2.23 lb / 35.63 oz)
OM-1 II is 2mm narrower, 19mm shorter, and 14mm thinner than K-1.
OM-1 II is 411 g lighter than K-1.
Depth (front-to-back): 73mm OM-1 II · 87mm K-1
Sensor size, to scale
OM-1 II
17.4 × 13 mm · Compact / large-type
226 mm² area
K-1
35.9 × 24 mm · Full Frame
862 mm² area
3.8× 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
K-1
Pentax K
70+
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-1 II
AF low-light limit
-8 EV vs -3 EV — lower is better
Subject recognition
Adds People, Birds, Animals…
Dimensions (W×H×D mm)
Adds 134.8, 91.6, 72.7
AF points / zones
1053 vs 101 — higher is better
Burst (electronic)
120 fps vs 20 fps — higher is better
ISO max (native)
102,400 vs 25,600 — higher is better
Card types
Adds SD UHS-I
IBIS effectiveness
8.5 stops vs 5 stops — higher is better
Reasons to choose
K-1
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 137, 110.5, 86.5
AA filter
Only K-1 supports it
Card slots
2 vs 1 — higher is better
Headphone jack (3.5mm)
Only K-1 supports it
Resolution
36.4 MP vs 20.4 MP — higher is better
Battery life (CIPA)
640 shots vs 520 shots — higher is better
Both cameras share
- ✓AF frame coverage — Both 100 %
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
- ✓4K max frame rate — Both 60 fps
- ✓Max video bit rate — Both 150 Mbps
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
K-1
Pros
- ✓36MP full-frame
- ✓IBIS in DSLR
- ✓AA filter simulator
- ✓Weather sealed
Cons
- –Slow AF vs mirrorless
- –Heavy
- –Superseded by K-1 II
Decided which one is right for you?
Compare live prices for the OM-1 II and K-1 at major authorized retailers.
OM System OM-1 II
Pentax K-1
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for landscape, OM-1 II or K-1?
K-1 scores 7.5/10 versus 2.5/10 for OM-1 II — 36.4MP — ample resolution.
What's the resolution difference between the OM-1 II and K-1?
OM-1 II is 20.4 MP and K-1 is 36.4 MP, so the K-1 captures more detail for cropping and large prints.
Do the OM-1 II and K-1 have in-body image stabilization?
OM-1 II has 8.5-stop in-body image stabilization, while K-1 has 5-stop in-body image stabilization.
Which shoots faster bursts — the OM-1 II or the K-1?
OM-1 II reaches 120 fps electronic. K-1 reaches 20 fps electronic.
What's the weight difference between the OM-1 II and K-1?
OM-1 II weighs 599 g and K-1 weighs 1010 g, so the OM-1 II is 411 g lighter.
Do the OM-1 II and K-1 record 4K video?
OM-1 II: 4K up to 60p. K-1: 4K up to 60p.
Are the OM-1 II and K-1 weather sealed?
OM-1 II: Yes. K-1: Yes.
Which has better battery life?
Rated battery life is 520 shots (CIPA) for the OM-1 II and 640 shots for the K-1, giving the K-1 the edge.
How much does each cost?
OM-1 II launched at $2,399 and K-1 at $1,799. The K-1 is $600 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way OM-1 II vs K-1 vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.