Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Sony - α7 IV | Sony - α7C II |
|---|---|---|
| Weight | 658 g | 514 g |
Between the α7 IV and α7C II, the α7 IV comes out ahead in several specs, while the α7C II wins on weight. Overall, the α7 IV scores 70.4 and the α7C II scores 71.7 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (70.4 vs 71.7). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
The α7 IV 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 α7C II if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are weight. The single most decisive one: Weight — 144.00 g less. 514 vs 658.
Both ship with comparable sensor size, megapixels, max video, 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: Sony - α7 IV or Sony - α7C II?
Sony - α7C II leads the current Mars Score by 1.3 points.The more useful decision is the trade-off behind that result: compare weight against the way you will actually use the product.
Choose Sony - α7 IV if…
Sony - α7 IV 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 - α7C II if…
Sony - α7C II has the measurable edge on weight g.
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 Sony - α7 IV wins
- No decisive advantages.
Why Sony - α7C II wins
- ▲Weight — 144.00 g less. 514 vs 658.
Spec comparison
Sensor
| Spec | Sony - α7 IV | Sony - α7C II |
|---|---|---|
| Sensor sizeⓘ | Full Frame | Full Frame |
| Megapixels | 33 MP | 33 MP |
| Max ISO | 51200 | 51200 |
Video
| Spec | Sony - α7 IV | Sony - α7C II |
|---|---|---|
| Max video | 4K60 | 4K60 |
| RAW video | false | false |
| Log profileⓘ | true | true |
Autofocus
| Spec | Sony - α7 IV | Sony - α7C II |
|---|---|---|
| AF pointsⓘ | 759 | 759 |
| Eye AFⓘ | true | true |
| In-body stabilizationⓘ | true | true |
Body & Controls
| Spec | Sony - α7 IV | Sony - α7C II |
|---|---|---|
| Weight | 658 g | 514 glead |
| Weather sealedⓘ | true | true |
| Dual card slotsⓘ | truelead | false |