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Panasonic S5 IIX vs Sony a7 IV

Side-by-side comparison based on expert reviews and community consensus.

Panasonic S5 IIX
Best for Video & Hybrid Shooters
Sony a7 IV
Best Overall
Price
$1,799–$2,200
$1,998–$2,700
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 sweet spot of resolution, autofocus, and value in the full-frame mirrorless world. At ~$2,000 it punches well above its price with a 33MP sensor, class-leading AF, and strong hybrid photo/video performance.
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
  • 33MP full-frame sensor with excellent dynamic range and low-light performance
  • Best-in-class real-time eye/subject tracking autofocus
  • Strong hybrid shooter: 4K video with 10-bit color and solid IBIS
  • Massive Sony E-mount lens ecosystem with decades of glass to choose from
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
  • 4K video is cropped at 60fps — not ideal for dedicated videographers
  • Body-only price around $2,000 is a significant investment
  • Menu system can feel overwhelming for newcomers to Sony
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're buying one full-frame mirrorless camera and don't want to think about it again for years, the a7 IV is the answer — it's the camera Reddit and expert reviewers keep circling back to as the sensible default.
Buy
The verdict

Get the Panasonic S5 IIX if you want for video & hybrid shooters performance. Get the Sony a7 IV if you value overall more. Both are excellent choices in full frame mirrorless cameras.