X100Svs Pentax K-3 Mark III
Pentax
Pentax K-3 Mark III (2021)
Starting from £1699 new
Best for DSLR enthusiasts & outdoor photographers
View Pentax K-3 Mark III
GearScore™ Verdict — Which should you buy?
Street & Travel — X100S (2013): The X100S was the moment the X100 series became legendary. Dramatically faster phase-detect AF, X-Trans II image quality, Fujifilm's film simulations, and the iconic hybrid viewfinder in a pocketable fixed-lens body — the blueprint every subsequent X100 has built on. A brilliant used-market buy for street and travel photographers who want the Fujifilm experience at an accessible price.
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.
Who should buy what
X100S (2013)
- Street photographers who want the Fujifilm X100 experience on a budget
- Travel photographers who love a fixed focal length
- Film photography enthusiasts who want digital film simulations
- Used-market buyers stepping into the X100 series
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
Quick take: The pentax k-3 mark iii has the highest resolution at 26mp; the x100s is the most affordable; only the pentax k-3 mark iii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | X100S (2013) | Pentax K-3 Mark III (2021) |
|---|---|---|
| Price | £250 | £1,699 |
| Sensor | 16.3MP APS-C X-Trans CMOS II | 25.7MP APS-C BSI CMOS (AA-filterless) |
| Resolution | 16.3MP | 25.7MP |
| Video | 1080p/60p | 4K/30p, 1080p/60p |
| Autofocus | Hybrid AF with sensor-embedded phase-detect + contrast-detect | SAFOX 13 phase-detect, 101-point (25 cross-type) |
| Stabilisation | — | 5.5-stop 5-axis IBIS (Shake Reduction III) |
| Burst Rate | 6fps | 12fps |
| Battery Life | ~330 shots (CIPA) | 800 shots (CIPA) |
| Weight | 445g (with battery and card) | 820g body only |
| Dimensions | 126.5 × 74.4 × 52.4mm | 134.5 × 103.5 × 73.5mm |
| Weather Sealed | No | Yes |
| Viewfinder | Hybrid optical/electronic viewfinder | Optical pentaprism, 100% coverage, 1.05× magnification |
| Screen | 2.8" fixed LCD, 460k dots | 3.2" tilting touchscreen |
| Mount | Fixed Fujinon 23mm f/2 (35mm equivalent) | Pentax KF-mount |
| Memory Cards | Single SD UHS-I slot | Dual SD UHS-II |
| Connectivity | USB, Wi-Fi (via optional adapter) | USB-C, Wi-Fi, Bluetooth |
Suitability by genre
| Genre | X100S | Pentax K-3 Mark III |
|---|---|---|
| Street | — | |
| Travel | ||
| Casual | — | |
| Portrait | ||
| Landscape | ||
| Vlogging & Video | ||
| Wildlife | — | |
| Sports & Action | — |
GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →
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Camera family history