Fujifilm X-T4vs 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?
Hybrid Shooters & Enthusiasts — Fujifilm X-T4 (2020): The X-T series reached hybrid maturity with the X-T4 — IBIS, 4K/60p, and Fujifilm colour science in the most complete X-T package.
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
Fujifilm X-T4 (2020)
- You want a capable hybrid camera for both stills and video shooting
- You're considering a mirrorless upgrade from a DSLR
- Note: the X-T5 offers better resolution for stills — consider it if video is secondary
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 fujifilm x-t4 has the highest resolution at 26mp; the fujifilm x-t4 is the most affordable; only the fujifilm x-t4, pentax k-3 mark iii are weather sealed. Scroll down for the full spec breakdown.
Full specifications
| Specification | Fujifilm X-T4 (2020) | Pentax K-3 Mark III (2021) | Sigma fp (2019) |
|---|---|---|---|
| Price | £999 | £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/60p, 1080p/240p, F-Log | 4K/30p, 1080p/60p | 12-bit Cinema DNG RAW, 4K/24p, 1080p/120p |
| Autofocus | Hybrid phase/contrast AF with face/eye detection | SAFOX 13 phase-detect, 101-point (25 cross-type) | Contrast-detect AF with face/eye detection |
| Stabilisation | 6.5-stop IBIS | 5.5-stop 5-axis IBIS (Shake Reduction III) | None (lens-based only) |
| Burst Rate | 15fps mechanical / 30fps electronic | 12fps | 18fps electronic |
| Battery Life | 600 shots (CIPA) | 800 shots (CIPA) | 200 shots (CIPA) |
| Weight | 607g body only | 820g body only | 422g body only |
| Dimensions | 134.6 × 92.8 × 63.8mm | 134.5 × 103.5 × 73.5mm | 112.6 × 69.9 × 45.3mm |
| Weather Sealed | Yes | Yes | No |
| Viewfinder | 0.5" OLED EVF, 3.69M dots, 100fps | Optical pentaprism, 100% coverage, 1.05× magnification | None |
| Screen | 3.0" fully articulating touchscreen | 3.2" tilting touchscreen | 3.15" fixed touchscreen |
| Mount | Fujifilm X-mount | Pentax KF-mount | Leica L-mount |
| Memory Cards | Dual SD UHS-I | Dual SD UHS-II | Single SD UHS-II + CFexpress Type B (via adapter) |
| Connectivity | USB-C, Wi-Fi, Bluetooth | USB-C, Wi-Fi, Bluetooth | USB-C 3.1, Wi-Fi, Bluetooth |
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