X-E4vs Pentax K-3 Mark IIIvs Sigma fp
Pentax
Pentax K-3 Mark III (2021)
From £1699
Best for DSLR enthusiasts & outdoor photographers
View Pentax K-3 Mark III
Sigma
Sigma fp (2019)
From £1499
Best for Creative filmmakers & experimental photographers
View Sigma fp
Which should you buy?
Compact Street & Travel Photography — X-E4 (2021): The X-E4 is for photographers who want the minimum camera that still delivers maximum image quality. If you love shooting from the rear screen and want the smallest possible X-mount body, this is your camera. If you need a viewfinder or IBIS, look at the X-S20 or X-T30 II.
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.
Creative Filmmakers & Experimental Photographers — Sigma fp (2019): The smallest full-frame camera in the world — Cinema DNG RAW and L-mount flexibility in a pocket-sized body that rewards creative shooters.
Who should buy what
X-E4 (2021)
- Street photographers who prioritise portability and discretion
- Travel photographers packing minimally
- Fujifilm fans who shoot primarily from the rear screen
- Anyone who wants the X-Trans sensor in the smallest possible body
Pentax K-3 Mark III (2021)
- You're a committed DSLR photographer with significant investment in Pentax glass
- You shoot in extreme weather conditions and place build quality and reliability above everything
- You prefer optical viewfinder performance and want the best modern APS-C DSLR available
Sigma fp (2019)
- You're a filmmaker building a cinema rig where the smallest full-frame body is essential
- You want L-mount compatibility to pair with Sigma Art or Leica SL lenses
- You prioritise video and cinema colour over stills ergonomics and functionality
Quick take: The x-e4 has the highest resolution at 26mp; the x-e4 is the most affordable; only the pentax k-3 mark iii is weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | X-E4 (2021) | Pentax K-3 Mark III (2021) | Sigma fp (2019) |
|---|---|---|---|
| Price | £699 | £1,699 | £1,499 |
| Sensor | 26.1MP APS-C X-Trans CMOS IV | 25.7MP APS-C BSI CMOS (AA-filterless) | 24.6MP full-frame Bayer CMOS |
| Resolution | 26.1MP | 25.7MP | 24.6MP |
| Video | 4K/30p, 1080p/240p slow-motion, F-Log | 4K/30p, 1080p/60p | 12-bit Cinema DNG RAW, 4K/24p, 1080p/120p |
| Autofocus | Phase-detect, 425 points, face/Eye detection | SAFOX 13 phase-detect, 101-point (25 cross-type) | Contrast-detect AF with face/eye detection |
| Stabilisation | None (no IBIS) | 5.5-stop 5-axis IBIS (Shake Reduction III) | None (lens-based only) |
| Burst Rate | 8fps mechanical, 20fps electronic | 12fps | 18fps electronic |
| Battery Life | ~460 shots (CIPA) | 800 shots (CIPA) | 200 shots (CIPA) |
| Weight | 364g (body only) | 820g body only | 422g body only |
| Dimensions | 121.3 × 72.9 × 32.7mm | 134.5 × 103.5 × 73.5mm | 112.6 × 69.9 × 45.3mm |
| Weather Sealed | No | Yes | No |
| Viewfinder | None — rear screen only (EVF accessory available) | Optical pentaprism, 100% coverage, 1.05× magnification | None |
| Screen | 3.0" fixed touchscreen, 1.62M dots | 3.2" tilting touchscreen | 3.15" fixed touchscreen |
| Mount | Fujifilm X-mount | Pentax KF-mount | Leica L-mount |
| Memory Cards | Single SD UHS-I | Dual SD UHS-II | Single SD UHS-II + CFexpress Type B (via adapter) |
| Connectivity | USB-C, Bluetooth, Wi-Fi | USB-C, Wi-Fi, Bluetooth | USB-C 3.1, Wi-Fi, Bluetooth |
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