Leica APO-Summicron-SL 50 f/2 ASPH. vs Sigma 50mm F1.4 CL DG | Contemporary (L-Mount)
Key differences
- —The 50mm F1.4 CL DG | Contemporary (L-Mount) is 365g lighter (375g vs 740g).
- —The 50mm F1.4 CL DG | Contemporary (L-Mount) is faster: f/1.4 vs f/2 (≈1.0 stops more light).
- —For close-ups the APO-Summicron-SL 50 f/2 ASPH. reaches 0.20× vs 0.15×.
Which to choose
- APO-Summicron-SL 50 f/2 ASPH.
Choose it for:
- +The best close-ups: 0.20× magnification
- 50mm F1.4 CL DG | Contemporary (L-Mount)
Choose it for:
- +The lightest option: 375g, 365g less than the next
- +The brightest aperture: f/1.4, about 1.0 stop more light
- +A physical aperture ring
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
- 50mm
- 50mm
- Max aperture
- F2
- F1.4◆
- Weight
- 740g
- 375g◆
- Dimensions ⌀ × L
- 73.0 × 102.0mm
- 64.7 × 54.0mm
- Volume
- 427 cm³
- 178 cm³◆
- Density
- 1.73 g/cm³
- 2.11 g/cm³
- Filter thread
- ⌀67mm
- ⌀52mm
- Min focus
- 0.35m◆
- 0.45m
- Max magnification
- 0.20×◆
- 0.15×
- Elements / groups
- 12 / 10
- 9 / 6
- Aperture blades
- Not published
- 14
- Focus drive
- Stepping motors (Dual Syncro Drive)
- RDD (Rotary Direct Drive)
- Stabilisation
- —
- —
- Weather sealed
- Yes
- Yes
- Aperture ring
- —
- Yes
- Released
- 2019
- 2026
- MSRP (USD)
- $4,495
- Unconfirmed
- Sharpness
- 9.6◆
- 7.8
- Bokeh Rendering
- 8.9◆
- 8.4
- Autofocus Speed
- 8.6◆
- 7.8
- Flare Resistance
- 8.5◆
- 8.0
- Build / Sealing
- 9.4◆
- 9.0
- Value / Size
- 6.5
- 8.0◆
Performance overlay
- APO-Summicron-SL 50 f/2 ASPH.
- 50mm F1.4 CL DG | Contemporary (L-Mount)
◆ marks the best value in a row. Scores are 0–10 editorial ratings.