The Sigma BF is 21.3 mm narrower, 35.7 mm shorter, 47.8 mm thinner and 416 g lighter than the Leica SL3-P.
| Leica SL3-P | Sigma BF | |
|---|---|---|
| Size (W × H × D) | 151.4 × 108.5 × 84.6 mm | 130.1 × 72.8 × 36.8 mm |
| Weight | 862 g | 446 g |
| Lens | L-Mount | L-Mount |
| Announced | 2026 | 2025 |