Sony FE 20-70mm f/4 G vs Samyang AF 24-70mm f/2.8
Sony FE 20-70mm f/4 G has more in its favour on paper. The AF 24-70mm f/2.8 gathers more light for low light and background blur; the FE 20-70mm f/4 G is lighter and the alternative. The Sony lens is the mount maker's own, while the Samyang is a third-party alternative.
Choose the FE 20-70mm f/4 G for
- less weight (488g vs 645g)
- a wider starting focal length (20mm vs 24mm)
Choose the AF 24-70mm f/2.8 for
- a brighter maximum aperture (f/2.8, about 1.0 stops more light)
- a lower price (about £410 vs £810)
| FE 20-70mm f/4 G | AF 24-70mm f/2.8 | |
|---|---|---|
| Brand | Sony | Samyang |
| Focal length | 20-70mm | 24-70mm |
| Maximum aperture | f/4 | f/2.8 |
| Weight | 488 g | 645 g |
| Stabilisation | No | No |
| Weather sealing | Yes | Yes |
| Filter size | 72mm | 82mm |
| Made for | Full frame | Full frame |
| New price | £999 | £899 |
| Used at MPB (Sony E / FE) | £789–£834 | £414–£414 |
More lens comparisons
See all Sony E / FE cameras and lenses.
Frequently asked questions
Is the Sony FE 20-70mm f/4 G better than the Samyang AF 24-70mm f/2.8?
The FE 20-70mm f/4 G offers less weight (488g vs 645g), a wider starting focal length (20mm vs 24mm); the AF 24-70mm f/2.8 offers a brighter maximum aperture (f/2.8, about 1.0 stops more light), a lower price (about £410 vs £810).
Which is better value, the FE 20-70mm f/4 G or the AF 24-70mm f/2.8?
On Sony E / FE, the Samyang AF 24-70mm f/2.8 costs about £410 against about £810 for the Sony FE 20-70mm f/4 G (MPB used where listed, otherwise new; checked 5 November 2026).
Is f/2.8 worth it over f/4?
f/2.8 gathers about 1.0 stops more light, which helps indoors, at night and for background blur. If you mostly shoot in good light, the slower lens is usually lighter and cheaper.
Do both lenses fit the same cameras?
Both are available for Sony E / FE.