Upgrade Guide
Pentax Pentax 17→Pentax Pentax K-3 Mark III
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
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Worthwhile
Clear improvements over the Pentax 17. Whether it justifies the cost depends on which upgrades matter most to your shooting.
What's new in the Pentax K-3 Mark III
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Weather sealingAdded — fully sealed body
-
StabilisationIBIS added — significant for handheld and video
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Battery life800 shots (CIPA) vs 2× CR2 lithium batteries
Suitability by genre
| Genre | Pentax 17 | Pentax K-3 Mark III | |
|---|---|---|---|
| Street | — | ||
| Travel | -2.0 | ||
| Portrait | — | ||
| Everyday | — | ||
| Landscape | +2.0 | ||
| Low Light | — | ||
| Wildlife | — | ||
| Sports & Action | — | ||
| Vlogging & Video | — |
Full spec comparison
| Spec | Pentax 17 | Pentax K-3 Mark III | |
|---|---|---|---|
| Price | £400 | £1,699 | |
| Released | 2024 | 2021 | ↓ |
| Sensor | 35mm half-frame (18 × 24mm) | 25.7MP APS-C BSI CMOS (AA-filterless) | |
| Resolution | — | 26MP | |
| Video | N/A — film camera | 4K/30p, 1080p/60p | |
| Autofocus | Zone focus (0.35m / 1m / 3m / ∞) | SAFOX 13 phase-detect, 101-point (25 cross-type) | |
| Stabilisation | N/A — film camera | 5.5-stop 5-axis IBIS (Shake Reduction III) | |
| Burst Rate | Manual wind-on | 12fps | |
| Battery Life | 2× CR2 lithium batteries | 800 shots (CIPA) | ↑ |
| Weight | ~165g (without batteries) | 820g body only | ↓ |
| Weather Sealed | No | Yes | ↑ |
| Viewfinder | Optical viewfinder with half-frame framelines | Optical pentaprism, 100% coverage, 1.05× magnification | |
| Screen | N/A | 3.2" tilting touchscreen | |
| Mount | 35mm film (ISO 25–3200 via DX coding + manual dial) | Pentax KF-mount | |
| Memory Cards | 35mm 135-format film cartridge | Dual SD UHS-II |
Compare side-by-side
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