Pentax K-3 Mark IIIvs A6100
Pentax
Pentax K-3 Mark III (2021)
Starting from £1699 new
Best for DSLR enthusiasts & outdoor photographers
View Pentax K-3 Mark III
VS
GearScore™ Verdict — Which should you buy?
Dslr Enthusiasts & Outdoor Photographers — Pentax K-3 Mark III (2021): The finest APS-C DSLR ever made — class-leading weather sealing, optical viewfinder, 5-axis IBIS, and extraordinary build for photographers committed to DSLR.
Beginner, Family, Travel — A6100 (2019): Best autofocus in its class for the price.
Who should buy what
Pentax K-3 Mark III (2021)
- 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
A6100 (2019)
- First-time mirrorless buyers who want solid AF
- Families stepping up from a smartphone
Quick take: The pentax k-3 mark iii has the highest resolution at 26mp; the a6100 is the most affordable; only the pentax k-3 mark iii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | Pentax K-3 Mark III (2021) | A6100 (2019) |
|---|---|---|
| Price | £1,699 | £549 |
| Sensor | 25.7MP APS-C BSI CMOS (AA-filterless) | APS-C Exmor CMOS |
| Resolution | 25.7MP | 24.2MP |
| Video | 4K/30p, 1080p/60p | 4K 30fps |
| Autofocus | SAFOX 13 phase-detect, 101-point (25 cross-type) | 425-point phase-detect, real-time tracking |
| Stabilisation | 5.5-stop 5-axis IBIS (Shake Reduction III) | None |
| Burst Rate | 12fps | 11fps |
| Battery Life | 800 shots (CIPA) | 420 shots (CIPA) |
| Weight | 820g body only | 396g (body only) |
| Dimensions | 134.5 × 103.5 × 73.5mm | 119.9 × 66.9 × 59.4mm |
| Weather Sealed | Yes | No |
| Viewfinder | Optical pentaprism, 100% coverage, 1.05× magnification | EVF 0.39" 1.44M-dot |
| Screen | 3.2" tilting touchscreen | 3.0" tilting touchscreen, 921k-dot |
| Mount | Pentax KF-mount | Sony E-Mount |
| Memory Cards | Dual SD UHS-II | SD UHS-I / Memory Stick |
| Connectivity | USB-C, Wi-Fi, Bluetooth | Wi-Fi, Bluetooth 4.1, Micro USB, Micro HDMI |
Suitability by genre
| Genre | Pentax K-3 Mark III | A6100 |
|---|---|---|
| Landscape | — | |
| Wildlife | — | |
| Sports & Action | — | |
| Portrait | — | |
| Travel | — | |
| Vlogging & Video | — |
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