Fujifilm GFX 100S IIvs Fujifilm X-Pro3vs Pentax K-3 Mark III

GearFrame · Updated March 2026

Fujifilm Fujifilm GFX 100S II Fujifilm Fujifilm GFX 100S II (2024) From £4499 Best for Commercial, studio & landscape professionals View Fujifilm GFX 100S II
VS
Fujifilm Fujifilm X-Pro3 Fujifilm Fujifilm X-Pro3 (2019) From £1599 Best for Street, documentary & rangefinder enthusiasts View Fujifilm X-Pro3
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?

Commercial, Studio & Landscape Professionals — Fujifilm GFX 100S II (2024): 102MP medium-format quality in the most accessible GFX body — the best entry point to the Fujifilm GFX system.

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.

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 GFX 100S II (2024)

  • You need the highest resolution available outside of a Phase One system
  • You shoot studio, fashion, landscape, or architecture at a professional level
  • You want medium format quality without the bulk of a traditional large-format system

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

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 gfx 100s ii has the highest resolution at 102mp; the fujifilm x-pro3 is the most affordable. Scroll down for the full spec breakdown.

Full specifications

Specification Fujifilm GFX 100S II (2024)Fujifilm X-Pro3 (2019)Pentax K-3 Mark III (2021)
Price £4,499 £1,599 £1,699
Sensor 102MP medium-format BSI CMOS (43.8 × 32.9mm) 26.1MP APS-C X-Trans CMOS IV 25.7MP APS-C BSI CMOS (AA-filterless)
Resolution 102.0MP 26.1MP 25.7MP
Video 4K/30p, 1080p/60p 4K/30p, 1080p/120p 4K/30p, 1080p/60p
Autofocus Phase-detect AF with subject/face/eye detection Hybrid phase/contrast AF with face/eye detection SAFOX 13 phase-detect, 101-point (25 cross-type)
Stabilisation 8-stop IBIS None (lens-based only) 5.5-stop 5-axis IBIS (Shake Reduction III)
Burst Rate 7fps 11fps mechanical / 20fps electronic 12fps
Battery Life 460 shots (CIPA) 440 shots (CIPA) 800 shots (CIPA)
Weight 883g body only 497g body only 820g body only
Dimensions 150.0 × 104.2 × 87.2mm 140.5 × 82.8 × 46.1mm 134.5 × 103.5 × 73.5mm
Weather Sealed Yes Yes Yes
Viewfinder 0.5" OLED EVF, 5.76M dots Hybrid OVF/EVF — 0.5" OLED, 3.69M dots Optical pentaprism, 100% coverage, 1.05× magnification
Screen 3.2" tilting touchscreen 3.0" hidden sub-LCD (opens down only) 3.2" tilting touchscreen
Mount Fujifilm GFX (G-mount) Fujifilm X-mount Pentax KF-mount
Memory Cards Dual SD UHS-II Single SD UHS-I Dual SD UHS-II
Connectivity USB-C 3.2, Wi-Fi, Bluetooth USB-C, Wi-Fi, Bluetooth USB-C, Wi-Fi, Bluetooth
⚡ Compare specs side by side Fujifilm GFX 100S II prices → Fujifilm X-Pro3 prices → Pentax K-3 Mark III prices →

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