Sigma has made the 50-120mm F2.8 DC OS | Contemporary official. Sigma America will sell it from Thursday, October 22, 2026, for $799, in Sony E, Fujifilm X, and Canon RF. There is no L-Mount and no Nikon Z version in this release. Now available for pre-order at B&H Photo Video.
It is the telephoto piece of Sigma’s constant-F2.8 APS-C Contemporary set, next to the 10-18mm F2.8 DC DN and the 18-50mm F2.8 DC DN. Sigma says the three together weigh about 935 g. On an APS-C body the new zoom covers about 75-180mm equivalent, which is the job a 70-200mm F2.8 does on full frame, in a much smaller barrel.
Same optics, three slightly different barrels
The press-release size, 99 mm and 390 g, is the Sony E figure. Fujifilm X matches the weight and is 0.3 mm longer. Canon RF is shorter and heavier, and its angle of view is narrower.
| Sony E | Fujifilm X | Canon RF | |
|---|---|---|---|
| Size | 66.8 × 99.0 mm | 66.8 × 99.3 mm | 69.0 × 97.0 mm |
| Weight | 390 g | 390 g | 410 g |
| Angle of view | 31.7°–13.5° | 31.7°–13.5° | 30.0°–12.8° |
| 50-120mm F2.8 DC OS | C | |
|---|---|
| Optics | 18 elements / 13 groups (1 FLD, 3 SLD, 4 aspherical) |
| Aperture | Constant F2.8 to F22, 11 rounded blades |
| Closest focus | 23 cm wide / 55 cm tele |
| Magnification | 1:3 at 50mm to 1:4.7 at 120mm |
| Stabilization | OS2, 6.5 stops at 50mm / 4.5 stops at 120mm (CIPA, APS-C) |
| Filter | 55mm, hood LH585-01 |
Focus is HLA, and the optical design holds focus breathing down. This is the first APS-C zoom in the Contemporary line with an aperture ring. Sigma also dropped the usual AF/MF switch and the OS switch, so those controls are not on the barrel. The build is dust- and splash-resistant, not waterproof, with a water- and oil-repellent front element.