Sigma 40mm F1.4 DG HSM | Art (L-Mount) vs Sirui Swift 40mm F2.2 (L-Mount)
The Sigma is brighter (f/1.4 vs f/2.2). The Sirui is 1080g lighter, has an aperture ring and cost $1,250 less at launch.
Key differences
- The Sirui is 1080g lighter (215g vs 1295g).
- The Sigma is faster: f/1.4 vs f/2.2 (≈1.3 stops more light).
- At launch the Sirui cost $1,250 less ($149 vs $1,399).
- For close-ups the Sigma 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 1.3 stops more light
- Swift 40mm F2.2 (L-Mount)
Choose it for:
- +The lightest option: 215g, 1080g less than the next
- +A physical aperture ring
- +The lowest launch price: $149, $1,250 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◆
- F2.2
- Weight
- 1,295g
- 215g◆
- Dimensions ⌀ × L
- 87.8 × 155.0mm
- 69.5 × 60.0mm
- Volume
- 938 cm³
- 228 cm³◆
- Density
- 1.38 g/cm³
- 0.94 g/cm³
- Filter thread
- ⌀82mm
- ⌀58mm
- Min focus
- 0.40m
- 0.40m
- Max magnification
- 0.15×◆
- 0.14×
- Elements / groups
- 16 / 12
- 11 / 8
- Aperture blades
- 9
- 9
- Focus drive
- HSM (Hyper Sonic Motor)
- STM
- Stabilisation
- —
- —
- Weather sealed
- Yes
- Yes
- Aperture ring
- —
- Yes
- Released
- 2019
- 2026
- MSRP (USD)
- $1,399
- $149◆
- Sharpness
- 9.4
- —
- Bokeh Rendering
- 8.6
- —
- Autofocus Speed
- 7.4
- —
- Flare Resistance
- 7.6
- —
- Build / Sealing
- 8.7
- —
- Value / Size
- 7.5
- —
Performance overlay
- 40mm F1.4 DG HSM | Art (L-Mount)
- Swift 40mm F2.2 (L-Mount)
◆ marks the best value in a row. Scores are 0–10 editorial ratings.