Pentax
Pentax K-3 Mark III 2021
Best for DSLR enthusiasts & outdoor photographers
£1699
list price · used from £856 at eBay
Decision tools · Compare
Pentax K-3 Mark III vs A6300
Quick take: The Pentax K-3 Mark III has the highest resolution at 26MP; the A6300 is the most affordable.
16 specs side by side·14 genres scored·UK prices from Wex Photo Video and Clifton Cameras
How to read this page. Highlighted cells win that row on the spec alone. Genre scores are the engine's base scores (enthusiast, photo and video); Camera Match re-weights them for your level and priorities. Price buttons are affiliate links; the price you pay is the same.
Sony
A6300 2016
Best for Travel, street, wildlife & 4K video
£449
list price · used from £240 at eBay
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Verdictwhich should you buy?
Pentax K-3 Mark III — Dslr Enthusiasts & Outdoor Photographers: The finest APS-C DSLR ever made — class-leading weather sealing, optical viewfinder, 5-axis IBIS, and extraordinary build for photographers committed to DSLR.
A6300 — Travel, Street, Wildlife & 4k Video: The camera that proved Sony APS-C was serious — world's fastest AF at launch, uncropped 4K, and 11fps in a compact weather-sealed body.
Who should buy what
Pentax K-3 Mark III (2021)
is the right camera for you if…
- DSLR photographers who want the finest APS-C optical viewfinder experience
- Outdoor and weather photographers who need robust all-weather sealing
- Pentax lens owners who want to use their existing K-mount glass
- Photographers who prefer optical viewfinders and refuse to switch to mirrorless
A6300 (2016)
is the right camera for you if…
- Travel and street photographers who want compact weather-sealed performance
- Wildlife photographers who need fast phase-detect AF in a lightweight body
- Content creators who want uncropped 4K in a compact E-mount body
- Sony E-mount users looking for an affordable used body with excellent image quality
Full specificationsthe better value in each row is highlighted
| Specification | Pentax K-3 Mark IIIPentax · 2021 | A6300Sony · 2016 |
|---|---|---|
| Price | £1,699 | £449Best |
| Sensor | 25.7MP APS-C BSI CMOS (AA-filterless) | 24.2MP APS-C Exmor CMOS |
| Resolution | 25.7MPBest | 24.2MP |
| Video | 4K/30p, 1080p/60p | 4K/30p (full pixel readout, no crop), 1080p/120p |
| Autofocus | SAFOX 13 phase-detect, 101-point (25 cross-type) | 425 phase-detect + 169 contrast-detect AF points — world's fastest at launch (0.05s) |
| Stabilisation | 5.5-stop 5-axis IBIS (Shake Reduction III) | No stabilisation |
| Burst Rate | 12fpsBest | 11fps |
| Battery Life | 800 shots (CIPA)Best | ~400 shots (CIPA) |
| Weight | 820g (body only) | 361g (with battery and card)Best |
| Dimensions | 134.5 × 103.5 × 73.5mm | 120.0 × 66.9 × 48.8mm |
| Weather Sealed | Yes | Yes |
| Viewfinder | Optical pentaprism, 100% coverage, 1.05× magnification | EVF, OLED 2.36M dots, 0.70× magnification |
| Screen | 3.2" fixed touchscreen | 3.0" tilting LCD, 921k dots (no touch) |
| Mount | Pentax KF-mount | Sony E-mount |
| Memory Cards | Dual SD UHS-II | Single SD UHS-I slot |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB, Wi-Fi, NFC |
Wins the row — price, resolution, burst, battery, weight and sealing are compared; text specs aren't ranked.
How they score by genreengine base scores out of 10
Genre
Pentax K-3 Mark III
A6300
Portrait
6.6/10
6.2/10
Street
5.2/10
7.0/10
Travel
5.5/10
6.6/10
Wedding & Events
7.0/10
5.1/10
Filmmaking
5.4/10
4.8/10
Documentary
6.4/10
5.7/10
Sports & Action
6.8/10
6.6/10
Landscape
6.2/10
5.4/10
Wildlife
6.8/10
7.2/10
Casual
4.3/10
4.1/10
Food
5.4/10
5.4/10
Macro
4.9/10
4.9/10
Architecture
6.0/10
5.2/10
Astrophotography
6.5/10
4.6/10
Scores come from the same engine as Camera Match: verified specifications weighted by what each genre needs, with documented adjustments. The product page and this table show the enthusiast base score. See how scores are calculated →
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