Blackmagic
Pocket Cinema Camera 6K Pro
Super 35 cinema box with EF mount, 6K BRAW, built-in ND, and tilting screen.
$2,495
Released Feb 2021
Pentax
K-3 Mark III
APS-C DSLR flagship with optical viewfinder and weather sealing.
$1,999
Released Apr 2021
K-3 Mark III is 2 months newer.
Wins
Pocket Cinema Camera 6K Pro
Wins
K-3 Mark III
13 categories tied
TL;DR — Key differences
- BK-3 Mark III has lower AF low-light limit (-3 EV vs 0 EV)
- BK-3 Mark III has higher AF points / zones (101 vs 0)
- BK-3 Mark III has higher AF frame coverage (100 % vs 0 %)
- APocket Cinema Camera 6K Pro has higher Max video bit rate (200 Mbps vs 150 Mbps)
- BK-3 Mark III has higher Resolution (25.7 MP vs 21.2 MP)
Key specs at a glance
Size and weight, to scale
Pocket Cinema Camera 6K Pro
138 × 98 × 88 mm
520 g (1.15 lb / 18.34 oz)
K-3 Mark III
138 × 98 × 88 mm
520 g (1.15 lb / 18.34 oz)
Pocket Cinema Camera 6K Pro and K-3 Mark III share virtually identical body dimensions.
Pocket Cinema Camera 6K Pro and K-3 Mark III weigh the same.
Depth (front-to-back): 88mm Pocket Cinema Camera 6K Pro · 88mm K-3 Mark III
Sensor size, to scale
Pocket Cinema Camera 6K Pro
23.5 × 15.6 mm · APS-C
367 mm² area
K-3 Mark III
23.5 × 15.6 mm · APS-C
367 mm² area
Lens ecosystem
Native lens selection
Pocket Cinema Camera 6K Pro
✓ more lensesCanon EF
300+
native lenses available
K-3 Mark III
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
Pocket Cinema Camera 6K Pro
Internal RAW video
Only Pocket Cinema Camera 6K Pro supports it
Codecs
Adds ProRes
Max video bit rate
200 Mbps vs 150 Mbps — higher is better
Reasons to choose
K-3 Mark III
AF low-light limit
-3 EV vs 0 EV — lower is better
AF points / zones
101 vs 0 — higher is better
AF frame coverage
100 % vs 0 % — higher is better
Resolution
25.7 MP vs 21.2 MP — higher is better
Both cameras share
- ✓ISO min (native) — Both 100
- ✓ISO max (native) — Both 25,600
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Burst (mechanical) — Both 8 fps
- ✓Burst (electronic) — Both 20 fps
Pros & cons at a glance
Editorially curated highlights and trade-offs.
Pocket Cinema Camera 6K Pro
Pros
- ✓6K BRAW internal
- ✓Built-in ND
- ✓EF mount versatility
Cons
- –Poor stills AF
- –Large for pocket name
- –Battery hungry
K-3 Mark III
Pros
- ✓Optical viewfinder
- ✓Weather sealed
- ✓IBIS in DSLR
Cons
- –DSLR system declining
- –APS-C
- –Limited video
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for video, Pocket Cinema Camera 6K Pro or K-3 Mark III?
Pocket Cinema Camera 6K Pro scores 7.5/10 versus 6.0/10 for K-3 Mark III — 4K recording.
What's the resolution difference between the Pocket Cinema Camera 6K Pro and K-3 Mark III?
Pocket Cinema Camera 6K Pro is 21.2 MP and K-3 Mark III is 25.7 MP, so the K-3 Mark III captures more detail for cropping and large prints.
Do the Pocket Cinema Camera 6K Pro and K-3 Mark III have in-body image stabilization?
Pocket Cinema Camera 6K Pro has 7-stop in-body image stabilization, while k-3 Mark III has 7-stop in-body image stabilization.
Which shoots faster bursts — the Pocket Cinema Camera 6K Pro or the K-3 Mark III?
Pocket Cinema Camera 6K Pro reaches 20 fps electronic. K-3 Mark III reaches 20 fps electronic.
What's the weight difference between the Pocket Cinema Camera 6K Pro and K-3 Mark III?
Both bodies weigh roughly 520 g.
Do the Pocket Cinema Camera 6K Pro and K-3 Mark III record 4K video?
Pocket Cinema Camera 6K Pro: 4K up to 60p. K-3 Mark III: 4K up to 60p.
Are the Pocket Cinema Camera 6K Pro and K-3 Mark III weather sealed?
Pocket Cinema Camera 6K Pro: Yes. K-3 Mark III: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the Pocket Cinema Camera 6K Pro and 640 shots for the K-3 Mark III, giving the K-3 Mark III the edge.
How much does each cost?
Pocket Cinema Camera 6K Pro launched at $2,495 and K-3 Mark III at $1,999. The K-3 Mark III is $496 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.