Sigma 40mm F1.4 DG HSM | Art (L-Mount) vs Viltrox AF 40mm F2.5 Air L (L-Mount)
Key differences
- —The AF 40mm F2.5 Air L (L-Mount) is 1126g lighter (169g vs 1295g).
- —The 40mm F1.4 DG HSM | Art (L-Mount) is faster: f/1.4 vs f/2.5 (≈1.7 stops more light).
- —At launch the AF 40mm F2.5 Air L (L-Mount) cost $1,231 less ($168 vs $1,399).
- —For close-ups the 40mm F1.4 DG HSM | Art (L-Mount) reaches 0.15× vs 0.14×.
Which to choose
- 40mm F1.4 DG HSM | Art (L-Mount)
Choose it for:
- +The brightest aperture: f/1.4, about 1.7 stops more light
- +Weather sealing
- AF 40mm F2.5 Air L (L-Mount)
Choose it for:
- +The lightest option: 169g, 1126g less than the next
- +The lowest launch price: $168, $1,231 less
Computed from published specs, confirmed launch prices and, where every lens has at least two reviews, review scores.
- Mount
- L-Mount (FF)
- L-Mount (FF)
- Focal length
- 40mm
- 40mm
- Max aperture
- F1.4◆
- F2.5
- Weight
- 1,295g
- 169g◆
- Dimensions ⌀ × L
- 87.8 × 155.0mm
- 64.0 × 52.5mm
- Volume
- 938 cm³
- 169 cm³◆
- Density
- 1.38 g/cm³
- 1.00 g/cm³
- Filter thread
- ⌀82mm
- ⌀52mm
- Min focus
- 0.40m
- 0.34m◆
- Max magnification
- 0.15×◆
- 0.14×
- Elements / groups
- 16 / 12
- 10 / 6
- Aperture blades
- 9◆
- 7
- Focus drive
- HSM (Hyper Sonic Motor)
- STM (Lead Screw)
- Stabilisation
- —
- —
- Weather sealed
- Yes
- —
- Aperture ring
- —
- —
- Released
- 2019
- 2026
- MSRP (USD)
- $1,399
- $168◆
- Sharpness
- 9.4◆
- 7.6
- Bokeh Rendering
- 8.6◆
- 7.0
- Autofocus Speed
- 7.4
- 7.5◆
- Flare Resistance
- 7.6◆
- 7.4
- Build / Sealing
- 8.7◆
- 7.0
- Value / Size
- 7.5
- 9.2◆
Performance overlay
- 40mm F1.4 DG HSM | Art (L-Mount)
- AF 40mm F2.5 Air L (L-Mount)
◆ marks the best value in a row. Scores are 0–10 editorial ratings.