Leica Super-APO-Summicron-SL 21 f/2 ASPH. vs Panasonic LUMIX S 20mm F2.5
Key differences
- —The LUMIX S 20mm F2.5 is 647g lighter (142g vs 789g).
- —The Super-APO-Summicron-SL 21 f/2 ASPH. is faster: f/2 vs f/2.5 (≈0.6 stops more light).
- —At launch the LUMIX S 20mm F2.5 cost $4,997 less ($498 vs $5,495).
- —For close-ups the Super-APO-Summicron-SL 21 f/2 ASPH. reaches 0.19× vs 0.15×.
Which to choose
- Super-APO-Summicron-SL 21 f/2 ASPH.
Choose it for:
- +The brightest aperture: f/2, about 0.6 stop more light
- +The longest reach: up to 21mm
- LUMIX S 20mm F2.5
Choose it for:
- +The lightest option: 142g, 647g less than the next
- +The widest view: starts at 20mm
- +The lowest launch price: $498, $4,997 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◆
- F2.5
- Weight
- 789g
- 142g◆
- Dimensions ⌀ × L
- 73.0 × 102.0mm
- 69.4 × 40.9mm
- Volume
- 427 cm³
- 155 cm³◆
- Density
- 1.85 g/cm³
- 0.92 g/cm³
- Filter thread
- ⌀67mm
- ⌀62mm
- Min focus
- 0.21m
- 0.18m◆
- Max magnification
- 0.19×◆
- 0.15×
- Elements / groups
- 14 / 11
- 11 / 9
- Aperture blades
- Not published
- 7
- Focus drive
- Dual Synchro Drive
- Stepping Motor
- Stabilisation
- —
- —
- Weather sealed
- Yes
- Yes
- Aperture ring
- —
- —
- Released
- 2023
- 2026
- MSRP (USD)
- $5,495
- $498◆
- Sharpness
- 9.2◆
- 7.6
- Bokeh Rendering
- 8.4◆
- 7.0
- Autofocus Speed
- 8.5◆
- 8.3
- Flare Resistance
- 8.3◆
- 6.4
- Build / Sealing
- 9.3◆
- 8.2
- Value / Size
- 5.5
- 7.8◆
Performance overlay
- Super-APO-Summicron-SL 21 f/2 ASPH.
- LUMIX S 20mm F2.5
◆ marks the best value in a row. Scores are 0–10 editorial ratings.