Decision tools · Compare

A7R III vs Sony FX5

Quick take: The A7R III has the highest resolution at 42MP; the A7R III is the most affordable.

16 specs side by side·15 genres scored·UK prices from Wex Photo Video and Clifton Cameras

How to read this page. Highlighted cells win that row on the spec alone. Genre scores are the engine's base scores (enthusiast, photo and video); Camera Match re-weights them for your level and priorities. Price buttons are affiliate links; the price you pay is the same.

Price buttons are affiliate links — GearFrame may earn a commission at no extra cost to you. It never affects a score. Learn more

Verdictwhich should you buy?

A7R III — Landscape, Studio & Commercial Photography: The camera that converted professionals to mirrorless — 42MP, IBIS, and 10fps in a body that still competes today.

Who should buy what
A7R III (2017)
is the right camera for you if…
  • Landscape and studio photographers who need 42MP resolution at a used-price discount vs A7R IV
  • Canon/Nikon DSLR professionals considering a mirrorless switch at a lower investment
  • Commercial and product photographers who want full-frame resolution with IBIS for handheld work
  • Portrait photographers who want the sharpest possible full-frame files for large print work
Full specificationsthe better value in each row is highlighted
Specification A7R IIISony · 2017Sony FX5Sony · 2026
Price £1,799Best£4,699
Sensor 42.4MP full-frame BSI Exmor R CMOS16.6MP full-frame stacked Exmor RS CMOS
Resolution 42.4MPBest16.6MP
Video 4K/30p (full-frame readout), 1080p/120p5K/60p open-gate, 4K/120p, internal RAW/X-OCN, 10-bit Log, triple base ISO
Autofocus 399 phase-detect + 425 contrast AF points — real-time Eye AFAI-powered hybrid phase-detect AF (759 points) with subject tracking
Stabilisation 5-axis IBIS — 5.5 stopsIBIS with Dynamic Active Mode
Burst Rate 10fps with AF/AE tracking10fps
Battery Life ~650 shots (CIPA)Best~105 min actual recording, ~170 min continuous (LCD)
Weight 650g (body only)Best734g (with battery and card)
Dimensions 126.9 × 95.6 × 73.7mm—
Weather Sealed YesYes
Viewfinder EVF, 3.69M dots, 0.78× magnificationOptional detachable EVF (DVF-EL1), OLED
Screen 3.0" touchscreen, tiltingFully articulating touchscreen (4-axis arm)
Mount Sony FE mount (full-frame E-mount)Sony E-mount
Memory Cards Dual SD slots (one UHS-II)CFexpress Type A + SDXC (dual)
Connectivity USB-C, Bluetooth, Wi-Fi, 3.5mm mic jackUSB-C, full-size HDMI, Wi-Fi, Bluetooth

Wins the row — price, resolution, burst, battery, weight and sealing are compared; text specs aren't ranked.

How they score by genreengine base scores out of 10
Genre
A7R III
Sony FX5
Portrait
7.8/10
6.9/10
Street
6.1/10
5.3/10
Travel
6.2/10
6.2/10
Wedding & Events
7.5/10
7.0/10
Filmmaking
6.3/10
8.7/10
Documentary
6.7/10
8.3/10
Sports & Action
7.3/10
6.8/10
Landscape
7.4/10
5.1/10
Wildlife
7.6/10
6.8/10
Casual
4.7/10
5.1/10
Food
7.0/10
7.4/10
Macro
6.2/10
5.2/10
Architecture
7.5/10
6.1/10
Astrophotography
7.0/10
6.7/10
Vlogging & Video
—
6.1/10

Scores come from the same engine as Camera Match: verified specifications weighted by what each genre needs, with documented adjustments. The product page and this table show the enthusiast base score. See how scores are calculated →

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