DJI
Osmo Pocket 4
Fourth-gen 1-inch pocket gimbal camera with 4K/240fps slow-motion, 14-stop D-Log, ActiveTrack 7.0, 107GB built-in storage, and 240-min battery.
$499
Launch priceReleased Apr 2026
Pentax
K-3 Mark III
APS-C DSLR flagship with optical viewfinder and weather sealing.
$1,999
Launch priceReleased Apr 2021
Osmo Pocket 4 is 5 years newer.
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Wins
Osmo Pocket 4
Wins
K-3 Mark III
5 categories tied
Which would you choose?
TL;DR — Key differences
- BK-3 Mark III has higher Battery life (CIPA) (640 shots vs -1 shots)
- AOsmo Pocket 4 has lower Weight (190.5 g vs 520 g)
- AOsmo Pocket 4 has lower ISO min (native) (50 vs 100)
- BK-3 Mark III has higher ISO max (native) (25,600 vs 12,800)
- BK-3 Mark III has higher Card slots (2 vs 1)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to share
Osmo Pocket 4
34 × 144 × 44 mm
190.5 g (0.42 lb / 6.72 oz)
Credit card
85.6 × 54 mm
for scale
K-3 Mark III
138 × 98 × 88 mm
520 g (1.15 lb / 18.34 oz)
Osmo Pocket 4 is 105mm narrower and 44mm thinner than K-3 Mark III but it is also 46mm taller.
Osmo Pocket 4 is 330 g lighter than K-3 Mark III.
Depth (front-to-back): 44mm Osmo Pocket 4 · 88mm K-3 Mark III
Back view, to scale
Width × Height — same proportions as the front of the body.
Osmo Pocket 4
34 × 144 mm
Credit card
85.6 × 54 mm
K-3 Mark III
138 × 98 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
Osmo Pocket 4
34 × 44 mm
Credit card
85.6 × 54 mm
K-3 Mark III
138 × 88 mm
Sensor size, to scale
Osmo Pocket 4
13.2 × 8.8 mm · 1-inch
116 mm² area
K-3 Mark III
23.5 × 15.6 mm · APS-C
367 mm² area
3.2× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
Osmo Pocket 4: mount data unavailable
K-3 Mark III
✓ more lensesPentax 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
Osmo Pocket 4
Dimensions (W×H×D mm)
Adds 33.5, 144.2, 44.4
Card types
Adds microSD
Weight
190.5 g vs 520 g — lower is better
ISO min (native)
50 vs 100 — lower is better
Subject recognition
Adds Face
Codecs
Adds HEVC (H.265)
Resolution
37 MP vs 25.7 MP — higher is better
Max video bit rate
180 Mbps vs 150 Mbps — higher is better
Reasons to choose
K-3 Mark III
Battery life (CIPA)
640 shots vs -1 shots — higher is better
Dimensions (W×H×D mm)
Adds 138, 98, 88
Card types
Adds SD UHS-II
Subject recognition
Adds Animal, Bird, Vehicle
ISO max (native)
25,600 vs 12,800 — higher is better
Eye AF
Only K-3 Mark III supports it
Animal / bird AF
Only K-3 Mark III supports it
Codecs
Adds H.265
Both cameras share
- ✓Burst (mechanical) — Both 8 fps
- ✓Burst (electronic) — Both 20 fps
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
- ✓RAW buffer depth — Both 120 frames
- ✓4K max frame rate — Both 60 fps
- ✓IBIS effectiveness — Both 7 stops
Pros & cons at a glance
Editorially curated highlights and trade-offs.
Osmo Pocket 4
Pros
- ✓4K/240fps slow-motion
- ✓14-stop dynamic range + 10-bit D-Log
- ✓107GB built-in + 800MB/s transfer
- ✓240-min battery life
Cons
- –No US official sale (FCC pending)
- –No weathersealing
- –Fixed lens
K-3 Mark III
Pros
- ✓Optical viewfinder
- ✓Weather sealed
- ✓IBIS in DSLR
Cons
- –DSLR system declining
- –APS-C
- –Limited video
Decided which one is right for you?
Compare live prices for the Osmo Pocket 4 and K-3 Mark III at major authorized retailers.
DJI Osmo Pocket 4
Pentax K-3 Mark III
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for wildlife, Osmo Pocket 4 or K-3 Mark III?
K-3 Mark III scores 10.0/10 versus 4.0/10 for Osmo Pocket 4 — 20fps burst captures fleeting moments.
What's the resolution difference between the Osmo Pocket 4 and K-3 Mark III?
Osmo Pocket 4 is 37 MP and K-3 Mark III is 25.7 MP, so the Osmo Pocket 4 captures more detail for cropping and large prints.
Do the Osmo Pocket 4 and K-3 Mark III have in-body image stabilization?
Osmo Pocket 4 uses a 3-axis mechanical gimbal, while K-3 Mark III has 7-stop in-body image stabilization.
Which shoots faster bursts — the Osmo Pocket 4 or the K-3 Mark III?
Osmo Pocket 4 reaches 20 fps electronic. K-3 Mark III reaches 20 fps electronic.
What's the weight difference between the Osmo Pocket 4 and K-3 Mark III?
Osmo Pocket 4 weighs 190.5 g and K-3 Mark III weighs 520 g, so the Osmo Pocket 4 is 330 g lighter.
Do the Osmo Pocket 4 and K-3 Mark III record 4K video?
Osmo Pocket 4: 4K up to 60p. K-3 Mark III: 4K up to 60p.
Are the Osmo Pocket 4 and K-3 Mark III weather sealed?
Osmo Pocket 4: No. K-3 Mark III: Yes.
Which has better battery life?
Rated battery life is -1 shots (CIPA) for the Osmo Pocket 4 and 640 shots for the K-3 Mark III, giving the K-3 Mark III the edge.
How much does each cost?
Osmo Pocket 4 launched at $499 and K-3 Mark III at $1,999. The Osmo Pocket 4 is $1,500 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way Osmo Pocket 4 vs K-3 Mark III vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.
Product images courtesy of DJI and Pentax press materials.