The Panasonic Lumix DMC-G2 is 21.5 mm narrower, 29.9 mm shorter, 6 mm thinner and 322 g lighter than the Sigma SD1.
| Sigma SD1 | Panasonic Lumix DMC-G2 | |
|---|---|---|
| Size (W × H × D) | 145.5 × 113.5 × 80 mm | 124 × 83.6 × 74 mm |
| Weight | 750 g | 428 g |
| Lens | Sigma SA | Micro Four Thirds |
| Sensor | — | Four Thirds |
| Announced | 2010 | 2010 |