PowerShot G7X Mark IIIvs Pentax K-3 Mark III

GearFrame · Updated March 2026

Canon PowerShot G7X Mark III Canon PowerShot G7X Mark III (2019) Starting from £749 new Best for Vlogging, content creation & travel video View PowerShot G7X Mark III
VS
Pentax Pentax K-3 Mark III Pentax Pentax K-3 Mark III (2021) Starting from £1699 new Best for DSLR enthusiasts & outdoor photographers View Pentax K-3 Mark III

GearScore™ Verdict — Which should you buy?

Vlogging, Content Creation & Travel Video — PowerShot G7X Mark III (2019): The finest vlogging compact available — pocket-sized 4K, a flip screen, mic input, and USB live streaming in one remarkably capable 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

PowerShot G7X Mark III (2019)

  • Vloggers and content creators who need 4K video, a flip screen, and a mic input in a pocket-sized camera
  • Travellers who want the best possible compact video quality without carrying an interchangeable-lens system
  • Live streamers who want USB streaming capability built into a compact camera
  • Smartphone upgraders who want significantly better video quality in something nearly as pocketable

Pentax K-3 Mark III (2021)

  • DSLR photographers who want the finest APS-C optical viewfinder experience
  • Outdoor and weather photographers who need robust all-weather sealing
  • Pentax lens owners who want to use their existing K-mount glass
  • Photographers who prefer optical viewfinders and refuse to switch to mirrorless

Quick take: The pentax k-3 mark iii has the highest resolution at 26mp; the powershot g7x mark iii is the most affordable; only the pentax k-3 mark iii is weather sealed. Scroll down for the full spec breakdown.

Full specifications

Specification PowerShot G7X Mark III (2019)Pentax K-3 Mark III (2021)
Price £749 £1,699
Sensor 20.1MP 1-inch BSI-CMOS 25.7MP APS-C BSI CMOS (AA-filterless)
Resolution 20.1MP 25.7MP
Video 4K/30p, 1080p/120p — no crop in 4K 4K/30p, 1080p/60p
Autofocus Dual Pixel CMOS AF — fast, reliable, with Eye AF SAFOX 13 phase-detect, 101-point (25 cross-type)
Stabilisation Optical IS — lens-based 5.5-stop 5-axis IBIS (Shake Reduction III)
Burst Rate 20fps (with fixed AF/AE) 12fps
Battery Life ~235 shots (CIPA) 800 shots (CIPA)
Weight 304g 820g body only
Dimensions 105.5 × 60.9 × 41.4mm 134.5 × 103.5 × 73.5mm
Weather Sealed No Yes
Viewfinder None Optical pentaprism, 100% coverage, 1.05× magnification
Screen 3.0" fully tilting touchscreen (180° flip for self-facing) 3.2" tilting touchscreen
Mount Fixed 24-100mm equivalent f/1.8-2.8 lens Pentax KF-mount
Memory Cards Single SD UHS-I slot Dual SD UHS-II
Connectivity USB-C, Bluetooth, Wi-Fi, 3.5mm mic jack, USB live streaming USB-C, Wi-Fi, Bluetooth
Genre PowerShot G7X Mark IIIPentax K-3 Mark III
Vlogging & Video
9.0
4.0
Travel
9.0
7.0
Street
7.0
Portrait
7.0
7.0
Landscape
7.0
9.0
Sports
4.0
Wildlife
9.0
Sports & Action
9.0
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