Leica Super-APO-Summicron-SL 21 f/2 ASPH. vs Sigma 20mm F1.4 DG DN | Art (L-Mount)
Key differences
- —The 20mm F1.4 DG DN | Art (L-Mount) is 154g lighter (635g vs 789g).
- —The 20mm F1.4 DG DN | Art (L-Mount) is faster: f/1.4 vs f/2 (≈1.0 stops more light).
- —At launch the 20mm F1.4 DG DN | Art (L-Mount) cost $4,596 less ($899 vs $5,495).
- —For close-ups the Super-APO-Summicron-SL 21 f/2 ASPH. reaches 0.19× vs 0.16×.
Which to choose
- Super-APO-Summicron-SL 21 f/2 ASPH.
Choose it for:
- +The longest reach: up to 21mm
- 20mm F1.4 DG DN | Art (L-Mount)
Choose it for:
- +The lightest option: 635g, 154g less than the next
- +The brightest aperture: f/1.4, about 1.0 stop more light
- +The widest view: starts at 20mm
- +A physical aperture ring
- +The lowest launch price: $899, $4,596 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
- 21mm
- 20mm
- Max aperture
- F2
- F1.4◆
- Weight
- 789g
- 635g◆
- Dimensions ⌀ × L
- 73.0 × 102.0mm
- 87.8 × 111.2mm
- Volume
- 427 cm³◆
- 673 cm³
- Density
- 1.85 g/cm³
- 0.94 g/cm³
- Filter thread
- ⌀67mm
- ⌀82mm
- Min focus
- 0.21m◆
- 0.23m
- Max magnification
- 0.19×◆
- 0.16×
- Elements / groups
- 14 / 11
- 17 / 15
- Aperture blades
- Not published
- 11
- Focus drive
- Dual Synchro Drive
- Stepping Motor
- Stabilisation
- —
- —
- Weather sealed
- Yes
- Yes
- Aperture ring
- —
- Yes · de-click
- Released
- 2023
- 2022
- MSRP (USD)
- $5,495
- $899◆
- Sharpness
- 9.2◆
- 8.5
- Bokeh Rendering
- 8.4◆
- 8.0
- Autofocus Speed
- 8.5◆
- 8.4
- Flare Resistance
- 8.3◆
- 8.0
- Build / Sealing
- 9.3◆
- 8.9
- Value / Size
- 5.5
- 8.8◆
Performance overlay
- Super-APO-Summicron-SL 21 f/2 ASPH.
- 20mm F1.4 DG DN | Art (L-Mount)
◆ marks the best value in a row. Scores are 0–10 editorial ratings.