Sony Alpha A7 III vs Sony Alpha A7 IV
Sony Alpha A7 III has the edge on paper, but the right choice depends on what you shoot. The Alpha A7 III is the better pick for astrophotography; the Alpha A7 IV is better for travel, sports, vlogging.
Choose the Alpha A7 III for
- better low-light performance
- a lighter body (650g vs 658g)
- a lower price (from £339)
Choose the Alpha A7 IV for
- more resolution (33MP vs 24MP)
- a newer design (2021)
Specs side by side
| Spec | Alpha A7 III | Alpha A7 IV |
|---|---|---|
| Sensor | Full frame, 24MP | Full frame, 33MP |
| Mount | Sony FE (full frame) | Sony FE (full frame) |
| Released | 2018 | 2021 |
| Burst | 10 fps | 10 fps |
| Readout | ≈65 ms | ≈65 ms |
| Max ISO | 51,200 | 51,200 |
| Stabilisation | In-body | In-body |
| Video | 4K 30p | 4K 60p (crop) |
| Weather sealed | Yes | Yes |
| Viewfinder | Electronic | Electronic |
| Weight | 650 g | 658 g |
| Battery | Sony NP-FZ100 | Sony NP-FZ100 |
| Card slots | 2× SD (UHS-II) | CFexpress A/SD + SD |
| New price | No longer sold new | £1,799 |
| Used at MPB | £339–904 | £1,059–1,249 |
| Native lenses in our database | 105 (82 third-party) | 105 (82 third-party) |
Which is better for…
| Use | Better choice |
|---|---|
| Beginner-friendly | About equal |
| Everyday & travel | Alpha A7 IV |
| Portraits | About equal |
| Landscape | About equal |
| Wildlife & animals | About equal |
| Sports & action | Alpha A7 IV |
| Astrophotography | Alpha A7 III |
| Vlogging & video | Alpha A7 IV |
| Vintage / film look | About equal |
Based on the specs that matter most for each type of photography: burst and readout for action, resolution for landscapes, sensor size and low light for portraits and astro, video and weight for vlogging.
Lenses and running costs
Both cameras use the Sony E / FE mount, so lenses move between them. They share the same battery (Sony NP-FZ100).
Alpha A7 III compatible lenses → · Alpha A7 IV compatible lenses → ·
Frequently asked questions
Is the Sony Alpha A7 III better than the Sony Alpha A7 IV?
It depends on your priorities. The Alpha A7 III offers better low-light performance, a lighter body (650g vs 658g), a lower price (from £339); the Alpha A7 IV offers more resolution (33MP vs 24MP), a newer design (2021).
Which is better for video, the Alpha A7 III or the Alpha A7 IV?
They are closely matched for video (4K 30p vs 4K 60p (crop)); stabilisation and lens choice will decide it.
Which is cheaper, the Alpha A7 III or the Alpha A7 IV?
The Alpha A7 III costs No longer sold new new and from £339 used at MPB; the Alpha A7 IV costs £1,799 new and from £1,059 used (checked 5 November 2026).
Can I use Sony Alpha A7 III lenses on the Alpha A7 IV?
Yes. Both use the Sony E / FE mount.