Sigma 15mm f/1.4 DG DN Diagonal Fisheye Art vs Viltrox AF 14mm f/4 Air
Sigma 15mm f/1.4 DG DN Diagonal Fisheye Art has more in its favour on paper. The 15mm f/1.4 DG DN Diagonal Fisheye Art gathers more light for low light and background blur; the AF 14mm f/4 Air is lighter and cheaper.
Choose the 15mm f/1.4 DG DN Diagonal Fisheye Art for
- a brighter maximum aperture (f/1.4, about 3.0 stops more light)
- weather sealing
Choose the AF 14mm f/4 Air for
- less weight (180g vs 670g)
- a lower price (about £169 vs £1,399)
| 15mm f/1.4 DG DN Diagonal Fisheye Art | AF 14mm f/4 Air | |
|---|---|---|
| Brand | Sigma | Viltrox |
| Focal length | 15mm | 14mm |
| Maximum aperture | f/1.4 | f/4 |
| Weight | 670 g | 180 g |
| Stabilisation | No | No |
| Weather sealing | Yes | No |
| Filter size | — | — |
| Made for | Full frame | Full frame |
| New price | £1,399 | £169 |
| Used at MPB (Sony E / FE) | None listed | None listed |
More lens comparisons
See all Sony E / FE cameras and lenses.
Frequently asked questions
Is the Sigma 15mm f/1.4 DG DN Diagonal Fisheye Art better than the Viltrox AF 14mm f/4 Air?
The 15mm f/1.4 DG DN Diagonal Fisheye Art offers a brighter maximum aperture (f/1.4, about 3.0 stops more light), weather sealing; the AF 14mm f/4 Air offers less weight (180g vs 670g), a lower price (about £169 vs £1,399).
Which is better value, the 15mm f/1.4 DG DN Diagonal Fisheye Art or the AF 14mm f/4 Air?
On Sony E / FE, the Viltrox AF 14mm f/4 Air costs about £169 against about £1,399 for the Sigma 15mm f/1.4 DG DN Diagonal Fisheye Art (MPB used where listed, otherwise new; checked 5 November 2026).
Is f/1.4 worth it over f/4?
f/1.4 gathers about 3.0 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 (and other mounts: L-Mount, Nikon Z).