Compare cameras
Sony a7 III vs Sony a7 IV
The Sony a7 III and the Sony a7 IV side by side, computed from this guide's catalogue.
Which to pick
Pick the Sony a7 IV if you want more resolution, for cropping and big prints (33 against 24.2 MP) and a newer model (2021 against 2018), which usually means better autofocus and video. On these specs the Sony a7 III has no clear advantage: choose it if the price, the handling or a lens you own decides it.
Still torn? Ask the guide about the Sony a7 III and the Sony a7 IV
Specs side by side
| Spec | Sony a7 III | Sony a7 IV |
|---|---|---|
| Maker | Sony | Sony |
| Mount | Sony E | Sony E |
| Sensor | Full frame, 36 x 24 mm | Full frame, 36 x 24 mm |
| Crop factor | 1× | 1× |
| Resolution | 24.2 MP | 33 MPmore detail |
| Stabilisation | in the body | in the body |
| Announced | 2018 | 2021 |
| Type | mirrorless camera | mirrorless camera |
| Weight | 650 g | 659 g |
| Lenses in this guide | 278 for its sensor, 125 more with a crop | 278 for its sensor, 125 more with a crop |
Sensor size
Crop factors: Sony a7 III 1×, Sony a7 IV 1×.
What a 50mm frames like
Both have the same sensor size, so a 50mm lens frames the same on each: like 50mm on full frame.
Lenses
Both take Sony E lenses, so a lens bought for one works on the other: 278 lenses in this guide cover both sensors.
The Sony a7 III: 278 Sony E lenses in this guide cover its sensor. The Sony a7 IV: 278 Sony E lenses in this guide cover its sensor.