Pentax
K-70
Weather-sealed APS-C DSLR with IBIS and AA filter simulator.
$649
Launch priceReleased Jun 2016
Sony
Alpha 9 III
Global shutter sports flagship with 120fps and zero rolling shutter for pro action.
$5,999
Launch priceReleased Jan 2024
Alpha 9 III is 7.7 years newer.
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Wins
K-70
Wins
Alpha 9 III
Which would you choose?
TL;DR — Key differences
- AK-70 has higher Burst (mechanical) (6 fps vs 0 fps)
- BAlpha 9 III has higher AF points / zones (759 vs 11)
- BAlpha 9 III has higher RAW buffer depth (200 frames vs 10 frames)
- AK-70 has higher ISO max (native) (204,800 vs 25,600)
- BAlpha 9 III has higher Burst (electronic) (120 fps vs 15 fps)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to share
K-70
126 × 93 × 74 mm
688 g (1.52 lb / 24.27 oz)
Credit card
85.6 × 54 mm
for scale
Alpha 9 III
136 × 97 × 83 mm
703 g (1.55 lb / 24.80 oz)
K-70 is 11mm narrower, 4mm shorter, and 9mm thinner than Alpha 9 III.
K-70 is 15 g lighter than Alpha 9 III.
Depth (front-to-back): 74mm K-70 · 83mm Alpha 9 III
Back view, to scale
Width × Height — same proportions as the front of the body.
K-70
126 × 93 mm
Credit card
85.6 × 54 mm
Alpha 9 III
136 × 97 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
K-70
126 × 74 mm
Credit card
85.6 × 54 mm
Alpha 9 III
136 × 83 mm
Sensor size, to scale
K-70
23.5 × 15.6 mm · APS-C
367 mm² area
Alpha 9 III
35.6 × 23.8 mm · Full Frame
847 mm² area
2.3× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
K-70
Pentax K
70+
native lenses available
Alpha 9 III
✓ more lensesSony E
350+
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-70
Burst (mechanical)
6 fps vs 0 fps — higher is better
Dimensions (W×H×D mm)
Adds 125.5, 93, 74
Card types
Adds SD, SDHC, SDXC
ISO max (native)
204,800 vs 25,600 — higher is better
ISO min (native)
100 vs 250 — lower is better
Subject recognition
Adds Vehicle
AF frame coverage
100 % vs 94 % — higher is better
EVF magnification
0.95 × vs 0.9 × — higher is better
Reasons to choose
Alpha 9 III
AF low-light limit
-5 EV vs -3 EV — lower is better
Dimensions (W×H×D mm)
Adds 136.1, 96.9, 82.9
Card types
Adds CFexpress Type A, SD UHS-II
AF points / zones
759 vs 11 — higher is better
RAW buffer depth
200 frames vs 10 frames — higher is better
Burst (electronic)
120 fps vs 15 fps — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I…
Max video bit rate
600 Mbps vs 150 Mbps — higher is better
Both cameras share
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
- ✓In-body stabilization (IBIS) — Both support in-body stabilization (ibis)
- ✓Weather sealing — Both support weather sealing
- ✓Wi-Fi — Both support wi-fi
Pros & cons at a glance
Editorially curated highlights and trade-offs.
K-70
Pros
- ✓Weather sealed entry
- ✓IBIS in DSLR
- ✓Unique features
Cons
- –DSLR
- –24MP dated
- –Limited video
Alpha 9 III
Pros
- ✓Global shutter 120fps
- ✓Zero rolling shutter
- ✓Pro sports AF
- ✓Pre-capture buffer
Cons
- –24.6MP only
- –Premium price
- –Battery drain at max speed
Decided which one is right for you?
Compare live prices for the K-70 and Alpha 9 III at major authorized retailers.
Pentax K-70
Sony Alpha 9 III
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, K-70 or Alpha 9 III?
Alpha 9 III scores 10.0/10 versus 6.5/10 for K-70 — 120fps burst — pro-level action capture.
What's the resolution difference between the K-70 and Alpha 9 III?
K-70 is 24.2 MP and Alpha 9 III is 24.6 MP, so the Alpha 9 III captures more detail for cropping and large prints.
Do the K-70 and Alpha 9 III have in-body image stabilization?
K-70 has 6-stop in-body image stabilization, while Alpha 9 III has 8-stop in-body image stabilization.
Which shoots faster bursts — the K-70 or the Alpha 9 III?
K-70 reaches 15 fps electronic. Alpha 9 III reaches 120 fps electronic.
What's the weight difference between the K-70 and Alpha 9 III?
K-70 weighs 688 g and Alpha 9 III weighs 703 g, so the K-70 is 15 g lighter.
Do the K-70 and Alpha 9 III record 4K video?
K-70: 4K up to 60p. Alpha 9 III: 4K up to 120p.
Are the K-70 and Alpha 9 III weather sealed?
K-70: Yes. Alpha 9 III: Yes.
How much does each cost?
K-70 launched at $649 and Alpha 9 III at $5,999. The K-70 is $5,350 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way K-70 vs Alpha 9 III vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed July 2026.
Product images courtesy of Pentax and Sony press materials.