Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Nikon - Z f | Sony - α9 III |
|---|---|---|
| AF points | 299 | 759 |
| Weight | 710 g | 703 g |
| Max video | 4K60 | 4K120 |
Between the Z f and α9 III, the Z f comes out ahead in several specs, while the α9 III wins on af points / weight. Overall, the Z f scores 64.3 and the α9 III scores 71.7 on our Mars Score.
Which should you buy?
The α9 III edges ahead on the Mars Score (64.3 vs 71.7), but the 7.4-point gap is small enough that the right pick comes down to which spec advantages matter to you.
The Z f does not pull ahead on any single popular-comparison spec — its strengths sit in the spec-table groups rather than the headline advantages.
Pick the α9 III if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are af points, weight, max video. The single most decisive one: AF points — 153.85% more. 759 vs 299.
Both ship with comparable sensor size, megapixels, in-body stabilization, so those specs do not separate the two — focus on the differences below.
Bottom line: the α9 III is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Nikon - Z f or Sony - α9 III?
Sony - α9 III leads the current Mars Score by 7.4 points.The more useful decision is the trade-off behind that result: compare max video, weight against the way you will actually use the product.
Choose Nikon - Z f if…
Nikon - Z f does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
Choose Sony - α9 III if…
Sony - α9 III has the measurable edge on af points, weight g, max video.
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 Nikon - Z f wins
- No decisive advantages.
Why Sony - α9 III wins
- ▲AF points — 153.85% more. 759 vs 299.
- ▲Weight — 7.00 g less. 703 vs 710.
- ▲Max video: 4K120 (vs 4K60).
Spec comparison
Sensor
| Spec | Nikon - Z f | Sony - α9 III |
|---|---|---|
| Sensor sizeⓘ | Full Frame | Full Frame |
| Megapixels | 24 MP | 24 MP |
| Max ISO | 64000lead | 51200 |
Video
| Spec | Nikon - Z f | Sony - α9 III |
|---|---|---|
| Max video | 4K60 | 4K120lead |
| RAW video | false | truelead |
| Log profileⓘ | true | true |
Autofocus
| Spec | Nikon - Z f | Sony - α9 III |
|---|---|---|
| AF pointsⓘ | 299 | 759lead |
| Eye AFⓘ | true | true |
| In-body stabilizationⓘ | true | true |
Body & Controls
| Spec | Nikon - Z f | Sony - α9 III |
|---|---|---|
| Weight | 710 g | 703 glead |
| Weather sealedⓘ | true | true |
| Dual card slotsⓘ | false | truelead |