Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Panasonic - Lumix S5IIX | Sony - FDR-AX700 |
|---|---|---|
| Max video | 6K | 4K30 |
| Sensor size | Full Frame | 1" |
| Optical zoom | 0 | 12 |
Between the Lumix S5IIX and FDR-AX700, the Lumix S5IIX comes out ahead in max video / sensor size, while the FDR-AX700 wins on optical zoom. Overall, the Lumix S5IIX scores 67.2 and the FDR-AX700 scores 62.6 on our Mars Score.
Which should you buy?
The Lumix S5IIX edges ahead on the Mars Score (67.2 vs 62.6), but the 4.6-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Lumix S5IIX if you care most about max video / sensor size. The biggest gaps in its favor are max video, sensor size. The single most decisive one: Max video: 6K (vs 4K30).
Pick the FDR-AX700 if you care most about optical zoom. Its strongest claims are optical zoom. The single most decisive one: Optical zoom: 12 vs 0.
Both ship with comparable xlr input, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Panasonic - Lumix S5IIX or Sony - FDR-AX700?
Panasonic - Lumix S5IIX leads the current Mars Score by 4.6 points.The more useful decision is the trade-off behind that result: compare max video, optical zoom, sensor size against the way you will actually use the product.
Choose Panasonic - Lumix S5IIX if…
Panasonic - Lumix S5IIX has the measurable edge on max video, sensor size.
Choose Sony - FDR-AX700 if…
Sony - FDR-AX700 has the measurable edge on optical zoom.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Panasonic - Lumix S5IIX wins
- ▲Max video: 6K (vs 4K30).
- ▲Sensor size: Full Frame (vs 1").
Why Sony - FDR-AX700 wins
- ▲Optical zoom: 12 vs 0.
Spec comparison
Video
| Spec | Panasonic - Lumix S5IIX | Sony - FDR-AX700 |
|---|---|---|
| Max video | 6Klead | 4K30 |
| Optical zoom | 0 | 12lead |
| Sensor sizeⓘ | Full Framelead | 1" |
Audio
| Spec | Panasonic - Lumix S5IIX | Sony - FDR-AX700 |
|---|---|---|
| XLR input | false | false |
| Headphone jack | true | true |
Design
| Spec | Panasonic - Lumix S5IIX | Sony - FDR-AX700 |
|---|---|---|
| Weight | 740 glead | 934 g |
| Articulating screen | true | true |