Insta360
Luna Ultra
Flagship dual-lens 3-axis gimbal camera with Leica Summicron 1-inch 8K main lens, 1/1.3-inch telephoto, detachable 2-inch OLED screen, 8K30 / 4K120 video, and 37MP UltraPhoto.
$770
Launch priceReleased Jun 2026
Pentax
K-3 Mark III
APS-C DSLR flagship with optical viewfinder and weather sealing.
$1,999
Launch priceReleased Apr 2021
Luna Ultra is 5.2 years newer.
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Wins
Luna Ultra
Wins
K-3 Mark III
1 categories tied
Which would you choose?
TL;DR — Key differences
- BK-3 Mark III has higher ISO max (native) (25,600 vs 6,400)
- ALuna Ultra has lower Weight (233 g vs 520 g)
- ALuna Ultra has higher 4K max frame rate (120 fps vs 60 fps)
- BK-3 Mark III has higher Card slots (2 vs 1)
- ALuna Ultra has higher Resolution (37 MP vs 25.7 MP)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to share
Luna Ultra
52 × 170 × 39 mm
233 g (0.51 lb / 8.22 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)
Luna Ultra is 86mm narrower and 50mm thinner than K-3 Mark III but it is also 72mm taller.
Luna Ultra is 287 g lighter than K-3 Mark III.
Depth (front-to-back): 39mm Luna Ultra · 88mm K-3 Mark III
Back view, to scale
Width × Height — same proportions as the front of the body.
Luna Ultra
52 × 170 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.
Luna Ultra
52 × 39 mm
Credit card
85.6 × 54 mm
K-3 Mark III
138 × 88 mm
Sensor size, to scale
Luna Ultra
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
Luna Ultra: 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
Luna Ultra
Dimensions (W×H×D mm)
Adds 52.4, 169.9, 38.5
Card types
Adds microSD
Weight
233 g vs 520 g — lower is better
4K max frame rate
120 fps vs 60 fps — higher is better
Resolution
37 MP vs 25.7 MP — higher is better
IBIS effectiveness
8 stops vs 7 stops — higher is better
Reasons to choose
K-3 Mark III
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 138, 98, 88
Card types
Adds SD UHS-II
ISO max (native)
25,600 vs 6,400 — higher is better
Eye AF
Only K-3 Mark III supports it
Animal / bird AF
Only K-3 Mark III supports it
Pre-Capture / Pre-Release
Only K-3 Mark III supports it
Codecs
Adds H.264
Both cameras share
- ✓ISO min (native) — Both 100
- ✓Touchscreen — Both support touchscreen
- ✓Wi-Fi — Both support wi-fi
- ✓Bluetooth — Both support bluetooth
Pros & cons at a glance
Editorially curated highlights and trade-offs.
Luna Ultra
Pros
- ✓Dual Leica lenses (1" + tele)
- ✓8K30 with 4K120 & 1080p240
- ✓Detachable 2" OLED screen
- ✓3-axis gimbal + Deep Track 5.0
Cons
- –Premium vs Pocket 3
- –No waterproofing
- –Tele reach capped at 240mm equiv
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 Luna Ultra and K-3 Mark III at major authorized retailers.
Insta360 Luna Ultra
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, Luna Ultra or K-3 Mark III?
K-3 Mark III scores 10.0/10 versus 0.0/10 for Luna Ultra — 20fps burst captures fleeting moments.
What's the resolution difference between the Luna Ultra and K-3 Mark III?
Luna Ultra is 37 MP and K-3 Mark III is 25.7 MP, so the Luna Ultra captures more detail for cropping and large prints.
Do the Luna Ultra and K-3 Mark III have in-body image stabilization?
Luna Ultra uses a 3-axis mechanical gimbal, while K-3 Mark III has 7-stop in-body image stabilization.
What's the weight difference between the Luna Ultra and K-3 Mark III?
Luna Ultra weighs 233 g and K-3 Mark III weighs 520 g, so the Luna Ultra is 287 g lighter.
Do the Luna Ultra and K-3 Mark III record 4K video?
Luna Ultra: 8K (7680×4320) (max), 4K up to 120p. K-3 Mark III: 4K up to 60p.
Are the Luna Ultra and K-3 Mark III weather sealed?
Luna Ultra: No. K-3 Mark III: Yes.
How much does each cost?
Luna Ultra launched at $770 and K-3 Mark III at $1,999. The Luna Ultra is $1,229 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way Luna Ultra 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 Insta360 and Pentax press materials.