Viltrox AF 40mm f/2.5 Air vs Sigma 45mm f/2.8 DG Contemporary
Both are L-Mount primes for standard prime and everyday — here's how the specs differ and which to pick. Every spec is from the manufacturer's own catalog.
| Spec | Viltrox AF 40mm f/2.5 Air | Sigma 45mm f/2.8 DG Contemporary |
|---|---|---|
| Focal length | 40mm | 45mm |
| Max aperture | f/2.5 | f/2.8 |
| Type | prime | prime |
| Coverage | full-frame | full-frame |
| Mount | L-Mount | L-Mount |
Which should you buy?
- the Viltrox AF 40mm f/2.5 Air opens wider (f/2.5) — brighter in low light and more background blur
- the Viltrox AF 40mm f/2.5 Air (40mm) is wider — more in the frame for street and interiors; the Sigma 45mm f/2.8 DG Contemporary (45mm) is tighter — more reach and compression for portraits
Where to buy
Viltrox AF 40mm f/2.5 AirSee price on Amazon
Sigma 45mm f/2.8 DG ContemporarySee price on Amazon
FAQ
What's the difference between the Viltrox AF 40mm f/2.5 Air and the Sigma 45mm f/2.8 DG Contemporary?
The Viltrox AF 40mm f/2.5 Air is 40mm f/2.5 prime, full-frame; the Sigma 45mm f/2.8 DG Contemporary is 45mm f/2.8 prime, full-frame. Both fit the L-Mount.
Which is better in low light, the Viltrox AF 40mm f/2.5 Air or the Sigma 45mm f/2.8 DG Contemporary?
The Viltrox AF 40mm f/2.5 Air — its f/2.5 maximum aperture lets in more light and gives more background blur than the f/2.8 of the other.
Do the Viltrox AF 40mm f/2.5 Air and Sigma 45mm f/2.8 DG Contemporary fit the same camera?
Yes — both are L-Mount lenses, so they fit Panasonic Lumix S, Leica SL, and Sigma fp full-frame bodies (the L-Mount Alliance).
More L-Mount comparisons: Panasonic Lumix S 24-105mm f/4 Macro OIS vs Panasonic Lumix S PRO 24-70mm f/2.8 · Panasonic Lumix S 24-105mm f/4 Macro OIS vs Sigma 28-70mm f/2.8 DG DN Contemporary · Sigma 14mm f/1.4 DG Art vs 7Artisans AF 24mm f/1.8 · Sigma 45mm f/2.8 DG Contemporary vs Sigma 35mm f/2 DG Contemporary · all L-Mount lenses · all comparisons