Panasonic Lumix S 20mm F2.5 vs Sigma 20mm F2 DG DN | Contemporary
Every published spec side by side, with today's lowest prices for the market you've chosen.
Key differences
- Maximum aperture: f/2 on the 20mm F2 DG DN | Contemporary, against f/2.5 on the Lumix S 20mm F2.5.
- Aperture blades: 9 on the 20mm F2 DG DN | Contemporary, against 7 on the Lumix S 20mm F2.5.
- Closest focus: 0.18 m on the Lumix S 20mm F2.5, against 0.22 m on the 20mm F2 DG DN | Contemporary.
- Aperture ring: Yes on the 20mm F2 DG DN | Contemporary, against No on the Lumix S 20mm F2.5.
- Weight: 142 g on the Lumix S 20mm F2.5, against 370 g on the 20mm F2 DG DN | Contemporary.
Lumix S 20mm F2.5 or 20mm F2 DG DN | Contemporary: which should you buy?
Choose the Lumix S 20mm F2.5 for its closest focus and weight.
Choose the 20mm F2 DG DN | Contemporary for its maximum aperture, aperture blades and aperture ring.
On paper the 20mm F2 DG DN | Contemporary wins more rows (3 to 2); if the Lumix S 20mm F2.5's strengths are the ones you shoot with, and its price is lower where you buy, it can still be the better buy.
 |  | |
|---|---|---|
| Lowest price today | $497.99 new | $689.95 new $450 used |
| Optics | ||
| Focal length | 20mm | 20mm |
| 35mm equivalent | 20mm (full frame) | 20mm (full frame) |
| Maximum apertureLower f-number lets in more light. A zoom wins only when it is as bright at both ends. | f/2.5 | f/2 (best) |
| Minimum aperture | f/22 | f/22 |
| Made for | Full frame | Full frame |
| Elements / groups | 11 / 9 | 13 / 11 |
| Aperture blades | 7 | 9 (best) |
| Closest focus | 0.18 m (best) | 0.22 m |
| Max magnification | 0.15× | 0.15× |
| Focus & handling | ||
| Autofocus | Yes (Stepping motor) | Yes (Stepping motor) |
| Optical stabilisation | No | No |
| Weather sealed | Yes | — |
| Internal zoom | — | — |
| Aperture ring | No | Yes (best) |
| Teleconverter compatible | No | No |
| Size & weight | ||
| Weight | 142 g (best) | 370 g |
| Diameter × length | 69.4 × 40.9 mm | 70 × 72.4 mm |
| Filter thread | 62 mm | 62 mm |
Green marks the better figure where “better” is unambiguous. A dash means the maker doesn't publish it or we haven't verified it yet.