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KFvs FX3

GearFrame · Updated March 2026

Pentax KF Pentax KF (2022) Starting from £700 new Best for Landscape & Outdoor View KF
VS
Sony FX3 Sony FX3 (2021) Starting from £3799 new Best for Professional video, documentary & cinematic filmmaking View FX3

GearScore™ Verdict — Which should you buy?

Landscape & Outdoor — KF (2022): The Pentax KF is a rare thing — a weather-sealed DSLR with in-body stabilisation and an articulating screen at an accessible price. Video is modest at 1080p/60p, but for outdoor and landscape photographers who prefer optical viewfinders and want real weather sealing, the KF delivers in a format that is increasingly hard to find.

Professional Video, Documentary & Cinematic Filmmaking — FX3 (2021): The definitive run-and-gun cinema camera — A7S III sensor quality in a body built specifically for video professionals.

↓ Full specifications below

KF (2022)

  • Outdoor and landscape photographers who want weather sealing at an accessible price
  • DSLR users who want IBIS and an articulating screen without switching systems
  • Pentax K-mount lens collectors who want a modern body for their glass
  • Photographers who prefer the natural feel of an optical viewfinder

FX3 (2021)

  • Professional videographers and filmmakers who need cinema-quality colour science in a compact body
  • Documentary and run-and-gun shooters who need 4K/120p and built-in XLR audio
  • Sony A7S III owners who want a purpose-built video body alongside their stills camera
  • Gimbal and drone operators who need a compact full-frame cinema camera

Quick take: The kf has the highest resolution at 24mp; the kf is the most affordable. Scroll down for the full spec breakdown.

Full specifications

Specification KF (2022)FX3 (2021)
Price £700 £3,799
Sensor 24.2MP APS-C CMOS 12.1MP full-frame BSI Exmor R CMOS (same as A7S III)
Resolution 24.2MP 12.1MP
Video 1080p/60p 4K/120p, 4K/60p 10-bit, 12-bit RAW output, S-Log3, S-Cinetone
Autofocus SAFOX 13 phase-detect AF with 11 points Real-time tracking with subject recognition (human, animal)
Stabilisation In-body Shake Reduction (SR II), up to 5.5 stops 5-axis IBIS — 5 stops
Burst Rate 6fps 10fps mechanical, 10fps electronic
Battery Life ~410 shots (CIPA) ~640 shots (CIPA)
Weight 643g (body only) 715g body only (with XLR handle)
Dimensions 131.0 × 101.0 × 76.0mm 129.7 × 78.0 × 84.5mm
Weather Sealed Yes Yes
Viewfinder Optical pentamirror, 0.95× magnification, ~100% coverage None — monitor/external EVF use only
Screen 3.0" fully articulating touchscreen, 1.04M dots 3.0" touchscreen, fully articulating
Mount Pentax KF-mount Sony FE mount (full-frame E-mount)
Memory Cards Single SD UHS-I slot Dual CFexpress Type A / SD UHS-II slots
Connectivity USB, Wi-Fi, Bluetooth USB-C (10Gbps), full-size HDMI, XLR via handle, Bluetooth, Wi-Fi
Genre KFFX3
Landscape
8.5
Travel
8.0
4.0
Portrait
7.5
7.0
Wildlife
7.5
Casual
7.5
Street
6.0
4.0
Vlogging & Video
4.5
9.0
Sports & Action
6.0
Low Light
9.0
Wedding
7.0

GearScore™ suitability scores are based on aggregated purchaser reviews weighted by photography genre. See how scores are calculated →

⚡ Compare specs side by side KF prices → FX3 prices →

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