Pentax
K-3 Mark III
APS-C DSLR flagship with optical viewfinder and weather sealing.
$1,999
Launch priceReleased Apr 2021
Z CAM
E2-S6
Super 35 6K cinema box camera with 14 stops DR, EF mount, ProRes/ZRAW internal recording, and 1Gb Ethernet.
$1,995
Launch priceReleased Jun 2020
K-3 Mark III is 11 months newer.
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Wins
K-3 Mark III
Wins
E2-S6
Which would you choose?
TL;DR — Key differences
- AK-3 Mark III has lower ISO min (native) (100 vs 500)
- BE2-S6 has higher Burst (electronic) (100 fps vs 20 fps)
- AK-3 Mark III has higher ISO max (native) (25,600 vs 6,400)
- AK-3 Mark III has lower Weight (520 g vs 1090 g)
- BE2-S6 has higher Max video bit rate (300 Mbps vs 150 Mbps)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to shareK-3 Mark III
138 × 98 × 88 mm
520 g (1.15 lb / 18.34 oz)
Credit card
85.6 × 54 mm
for scale
E2-S6
91 × 99 × 122 mm
1090 g (2.40 lb / 38.45 oz)
K-3 Mark III is 1mm shorter and 34mm thinner than E2-S6 but it is also 47mm wider.
K-3 Mark III is 570 g lighter than E2-S6.
Depth (front-to-back): 88mm K-3 Mark III · 122mm E2-S6
Sensor size, to scale
K-3 Mark III
23.5 × 15.6 mm · APS-C
367 mm² area
E2-S6
23.4 × 15.67 mm · APS-C
367 mm² area
Lens ecosystem
Native lens selection
K-3 Mark III
Pentax K
70+
native lenses available
E2-S6
✓ more lensesCanon EF
300+
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
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 min (native)
100 vs 500 — lower is better
ISO max (native)
25,600 vs 6,400 — higher is better
Weight
520 g vs 1090 g — lower is better
Eye AF
Only K-3 Mark III supports it
Animal / bird AF
Only K-3 Mark III supports it
Reasons to choose
E2-S6
Dimensions (W×H×D mm)
Adds 91.2, 99.25, 122.25
Card types
Adds CFast 2.0
Burst (electronic)
100 fps vs 20 fps — higher is better
Max video bit rate
300 Mbps vs 150 Mbps — higher is better
Internal RAW video
Only E2-S6 supports it
Codecs
Adds ProRes, ZRAW
4K max frame rate
100 fps vs 60 fps — higher is better
Resolution
26 MP vs 25.7 MP — higher is better
Both cameras share
- ✓Wi-Fi — Both support wi-fi
- ✓Microphone jack (3.5mm) — Both support microphone jack (3.5mm)
- ✓Headphone jack (3.5mm) — Both support headphone jack (3.5mm)
Pros & cons at a glance
Editorially curated highlights and trade-offs.
K-3 Mark III
Pros
- ✓Optical viewfinder
- ✓Weather sealed
- ✓IBIS in DSLR
Cons
- –DSLR system declining
- –APS-C
- –Limited video
E2-S6
Pros
- ✓Super 35 26MP 6K sensor
- ✓6K up to 60fps / 4K up to 100fps
- ✓ProRes + ZRAW internal
- ✓14 stops dynamic range
- ✓1Gb Ethernet + HDMI
Cons
- –Rolling shutter (not global)
- –No built-in ND
- –Requires external monitor for framing
- –EF mount only (adapters for PL/MFT)
Decided which one is right for you?
Compare live prices for the K-3 Mark III and E2-S6 at major authorized retailers.
Pentax K-3 Mark III
Z CAM E2-S6
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for wildlife, K-3 Mark III or E2-S6?
K-3 Mark III scores 10.0/10 versus 2.5/10 for E2-S6 — 20fps burst captures fleeting moments.
What's the resolution difference between the K-3 Mark III and E2-S6?
K-3 Mark III is 25.7 MP and E2-S6 is 26 MP, so the E2-S6 captures more detail for cropping and large prints.
Do the K-3 Mark III and E2-S6 have in-body image stabilization?
K-3 Mark III has 7-stop in-body image stabilization, while E2-S6 does not have IBIS.
Which shoots faster bursts — the K-3 Mark III or the E2-S6?
K-3 Mark III reaches 20 fps electronic. E2-S6 reaches 100 fps electronic.
What's the weight difference between the K-3 Mark III and E2-S6?
K-3 Mark III weighs 520 g and E2-S6 weighs 1090 g, so the K-3 Mark III is 570 g lighter.
Do the K-3 Mark III and E2-S6 record 4K video?
K-3 Mark III: 4K up to 60p. E2-S6: 6K Open Gate (6244 × 4168) (max), 4K up to 100p.
Are the K-3 Mark III and E2-S6 weather sealed?
K-3 Mark III: Yes. E2-S6: No.
How much does each cost?
K-3 Mark III launched at $1,999 and E2-S6 at $1,995. The E2-S6 is $4 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way K-3 Mark III vs E2-S6 vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed June 2026.