Decision tools · Compare
1 J5 vs Pentax K-3 Mark III
Quick take: The Pentax K-3 Mark III has the highest resolution at 26MP; the 1 J5 is the most affordable; only the Pentax K-3 Mark III is weather sealed.
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.
Pentax
Pentax K-3 Mark III 2021
Best for DSLR enthusiasts & outdoor photographers
£1048
used today 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.
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
Full specificationsthe better value in each row is highlighted
| Specification | 1 J5Nikon · 2015 | Pentax K-3 Mark IIIPentax · 2021 |
|---|---|---|
| Price | — | £1,048 used |
| Sensor | 20.8MP 1-inch (CX) BSI CMOS | 25.7MP APS-C BSI CMOS (AA-filterless) |
| Resolution | 20.8MP | 25.7MPBest |
| Video | 4K UHD/15p, 1080p/60 | 4K/30p, 1080p/60p |
| Autofocus | Hybrid AF: 171 areas, 105 with phase detection; face detection, subject tracking | SAFOX 13 phase-detect, 101-point (25 cross-type) |
| Stabilisation | No IBIS (lens-based stabilisation only) | 5.5-stop 5-axis IBIS (Shake Reduction III) |
| Burst Rate | 20fpsBest | 12fps |
| Battery Life | ~250 shots (CIPA) | 800 shots (CIPA)Best |
| Weight | 265g (with battery)Best | 820g (body only) |
| Dimensions | 98.3 × 59.7 × 31.5mm | 134.5 × 103.5 × 73.5mm |
| Weather Sealed | Not weather sealed | YesBest |
| Viewfinder | None (rear screen only) | Optical pentaprism, 100% coverage, 1.05× magnification |
| Screen | 3.0" tilting touchscreen, 1.04M dots | 3.2" fixed touchscreen |
| Mount | Nikon 1 | Pentax KF-mount |
| Memory Cards | Single microSD slot | Dual SD UHS-II |
| Connectivity | USB, micro HDMI, Wi-Fi, NFC | USB-C, Wi-Fi, Bluetooth |
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
1 J5
Pentax K-3 Mark III
Portrait
4.3/10
6.6/10
Street
6.7/10
5.2/10
Travel
6.1/10
5.3/10
Wedding & Events
2.9/10
7.0/10
Filmmaking
3.2/10
5.4/10
Documentary
4.1/10
6.4/10
Sports & Action
4.9/10
6.8/10
Landscape
3.9/10
6.2/10
Wildlife
5.1/10
6.8/10
Casual
5.0/10
4.1/10
Food
4.8/10
5.4/10
Macro
3.4/10
4.9/10
Architecture
3.9/10
6.0/10
Astrophotography
3.0/10
6.5/10
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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