Fujifilm X-Pro3vs Fujifilm X-T4vs Pentax K-3 Mark III

GearFrame · Updated March 2026

Fujifilm Fujifilm X-Pro3 Fujifilm Fujifilm X-Pro3 (2019) From £1599 Best for Street, documentary & rangefinder enthusiasts View Fujifilm X-Pro3
VS
Fujifilm Fujifilm X-T4 Fujifilm Fujifilm X-T4 (2020) From £999 Best for Hybrid shooters & enthusiasts View Fujifilm X-T4
VS
Pentax Pentax K-3 Mark III Pentax Pentax K-3 Mark III (2021) From £1699 Best for DSLR enthusiasts & outdoor photographers View Pentax K-3 Mark III

Which should you buy?

Street, Documentary & Rangefinder Enthusiasts — Fujifilm X-Pro3 (2019): The most opinionated camera Fujifilm makes — a hidden screen and hybrid OVF enforce deliberate photography, rewarding photographers who slow down.

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.

↓ Full specifications below

Fujifilm X-Pro3 (2019)

  • You shoot street or documentary photography and value a minimal shooting workflow
  • You want a rangefinder experience with modern digital image quality
  • You love Fujifilm film simulations and prioritise stills over video

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

Quick take: The fujifilm x-pro3 has the highest resolution at 26mp; the fujifilm x-t4 is the most affordable. Scroll down for the full spec breakdown.

Full specifications

Specification Fujifilm X-Pro3 (2019)Fujifilm X-T4 (2020)Pentax K-3 Mark III (2021)
Price £1,599 £999 £1,699
Sensor 26.1MP APS-C X-Trans CMOS IV 26.1MP APS-C X-Trans CMOS IV 25.7MP APS-C BSI CMOS (AA-filterless)
Resolution 26.1MP 26.1MP 25.7MP
Video 4K/30p, 1080p/120p 4K/60p, 1080p/240p, F-Log 4K/30p, 1080p/60p
Autofocus Hybrid phase/contrast AF with face/eye detection Hybrid phase/contrast AF with face/eye detection SAFOX 13 phase-detect, 101-point (25 cross-type)
Stabilisation None (lens-based only) 6.5-stop IBIS 5.5-stop 5-axis IBIS (Shake Reduction III)
Burst Rate 11fps mechanical / 20fps electronic 15fps mechanical / 30fps electronic 12fps
Battery Life 440 shots (CIPA) 600 shots (CIPA) 800 shots (CIPA)
Weight 497g body only 607g body only 820g body only
Dimensions 140.5 × 82.8 × 46.1mm 134.6 × 92.8 × 63.8mm 134.5 × 103.5 × 73.5mm
Weather Sealed Yes Yes Yes
Viewfinder Hybrid OVF/EVF — 0.5" OLED, 3.69M dots 0.5" OLED EVF, 3.69M dots, 100fps Optical pentaprism, 100% coverage, 1.05× magnification
Screen 3.0" hidden sub-LCD (opens down only) 3.0" fully articulating touchscreen 3.2" tilting touchscreen
Mount Fujifilm X-mount Fujifilm X-mount Pentax KF-mount
Memory Cards Single SD UHS-I Dual SD UHS-I Dual SD UHS-II
Connectivity USB-C, Wi-Fi, Bluetooth USB-C, Wi-Fi, Bluetooth USB-C, Wi-Fi, Bluetooth
⚡ Compare specs side by side Fujifilm X-Pro3 prices → Fujifilm X-T4 prices → Pentax K-3 Mark III prices →

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