Side-by-side comparison based on expert reviews and community consensus.
Panasonic S5 IIX
Best for Video & Hybrid ShootersSony a9 III
Best for Sports & ActionPrice
$1,799–$2,200
$6,798–$7,000
Summary
Reddit's top recommendation for full-frame video under $2,000, with phase-detect AF finally fixed, 6K open-gate recording, and ProRes internal recording that rivals cameras costing twice as much.
The world's first full-frame global shutter camera eliminates rolling shutter entirely and shoots at 120fps with zero blackout — Reddit and PCMag both call it the best sports/action camera money can buy.
Pros
- Reddit consensus pick for 'best full-frame for under $2000, especially for video'
- Internal ProRes recording and 6K open-gate — features usually found on cinema cameras
- Phase-detect AF finally added, fixing the biggest weakness of previous Panasonic bodies
- Excellent IBIS and dual native ISO for clean low-light footage
- World's first full-frame global shutter sensor — zero rolling shutter distortion
- 120fps continuous shooting with full AF/AE tracking and no blackout
- Flash sync at any shutter speed, a game-changer for studio and outdoor sports work
- Reddit consensus: 'Sony A9iii hands down' for best action/sports full-frame
Cons
- Photo performance and autofocus still trail Sony and Canon for stills-first shooters
- L-mount lens ecosystem is smaller than Sony E-mount or Canon RF
- Body design is bulkier than Sony a7-series competitors
- ~$6,800 body-only price puts it out of reach for most photographers
- Global shutter sensor has slightly lower dynamic range than Sony's best stacked sensors
- Overkill for anything other than fast-action or professional sports work
Our take
Panasonic finally cracked phase-detect AF with the S5 IIX, and now it's the video-first full-frame camera that hybrid shooters have been waiting for — especially if you're coming from a filmmaking background.
If you shoot sports, wildlife, or anything that moves fast, the a9 III is in a class by itself. The global shutter is a genuine technological leap, not a marketing gimmick.
Buy
