Between the FDR-AX700 and FX3, the FDR-AX700 comes out ahead in optical zoom, while the FX3 wins on xlr input and max video. Overall, the FDR-AX700 scores 66.2 and the FX3 scores 35 on our Mars Score.
Which should you buy?
The FDR-AX700 is the clear pick on raw spec strength, leading by 31.2 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the FDR-AX700 if you care most about optical zoom. The biggest gaps in its favor are optical zoom.
Pick the FX3 if you care most about xlr input and max video. Its strongest claims are xlr input, max video, sensor size.
There are no meaningful ties on the headline specs — every popular-comparison metric has a winner.
Bottom line: the FDR-AX700 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Sony - FDR-AX700 wins
- ▲Optical zoom: 12 vs 0.
Why Sony - FX3 wins
- ▲Has XLR input.
- ▲Max video: 4K120 (vs 4K30).
- ▲Sensor size: Full Frame (vs 1").
Spec comparison
Video
| Spec | Sony - FDR-AX700 | Sony - FX3 |
|---|---|---|
| Max video | 4K30 | 4K120lead |
| Optical zoom | 12lead | 0 |
| Sensor sizeⓘ | 1" | Full Framelead |
Audio
| Spec | Sony - FDR-AX700 | Sony - FX3 |
|---|---|---|
| XLR input | false | truelead |
| Headphone jack | true | true |
Design
| Spec | Sony - FDR-AX700 | Sony - FX3 |
|---|---|---|
| Weight | 934 g | 715 glead |
| Articulating screen | true | true |
Frequently asked
Spec-level deep dives
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