Fujifilm GFX 100S IIvs Pentax K-3 Mark IIIvs Sigma fp L

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
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
VS
Sigma Sigma fp L Sigma Sigma fp L (2021) From £1999 Best for High-resolution creative & documentary shooters View Sigma fp L

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.

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.

High-Resolution Creative & Documentary Shooters — Sigma fp L (2021): 61MP and phase-detect AF in the world's smallest full-frame body — the fp L is the most capable iteration of Sigma's extraordinary compact.

↓ 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

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 L (2021)

  • You need the highest resolution available in the smallest possible full-frame mirrorless
  • You shoot architecture, landscape, or commercial work where fine detail is absolutely critical
  • You want the cinematic flexibility of the fp platform paired with maximum megapixel count

Quick take: The fujifilm gfx 100s ii has the highest resolution at 102mp; the pentax k-3 mark iii is the most affordable; only the fujifilm gfx 100s ii, pentax k-3 mark iii are weather sealed. Scroll down for the full spec breakdown.

Full specifications

Specification Fujifilm GFX 100S II (2024)Pentax K-3 Mark III (2021)Sigma fp L (2021)
Price £4,499 £1,699 £1,999
Sensor 102MP medium-format BSI CMOS (43.8 × 32.9mm) 25.7MP APS-C BSI CMOS (AA-filterless) 61MP full-frame BSI CMOS
Resolution 102.0MP 25.7MP 61.0MP
Video 4K/30p, 1080p/60p 4K/30p, 1080p/60p 12-bit Cinema DNG RAW, 4K/24p
Autofocus Phase-detect AF with subject/face/eye detection SAFOX 13 phase-detect, 101-point (25 cross-type) Phase-detect AF with face/eye detection
Stabilisation 8-stop IBIS 5.5-stop 5-axis IBIS (Shake Reduction III) None (lens-based only)
Burst Rate 7fps 12fps 18fps electronic
Battery Life 460 shots (CIPA) 800 shots (CIPA) 200 shots (CIPA)
Weight 883g body only 820g body only 427g body only
Dimensions 150.0 × 104.2 × 87.2mm 134.5 × 103.5 × 73.5mm 112.6 × 69.9 × 45.3mm
Weather Sealed Yes Yes No
Viewfinder 0.5" OLED EVF, 5.76M dots Optical pentaprism, 100% coverage, 1.05× magnification None (optional clip-on EVF available)
Screen 3.2" tilting touchscreen 3.2" tilting touchscreen 3.15" fixed touchscreen
Mount Fujifilm GFX (G-mount) Pentax KF-mount Leica L-mount
Memory Cards Dual SD UHS-II Dual SD UHS-II Single SD UHS-II
Connectivity USB-C 3.2, Wi-Fi, Bluetooth USB-C, Wi-Fi, Bluetooth USB-C 3.1, Wi-Fi, Bluetooth
⚡ Compare specs side by side Fujifilm GFX 100S II prices → Pentax K-3 Mark III prices → Sigma fp L prices →

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