Product Information
The Sigma 50-120mm F2.8 DC OS | Contemporary is a constant-aperture zoom designed for FUJIFILM X-mount APS-C mirrorless cameras. Its 50-120mm range, F2.8 maximum aperture, and Optical Stabilizer support flexible framing from portraits to distant subjects.
Optical design for APS-C mirrorless
The lens uses 18 elements in 13 groups, including 1 FLD, 3 SLD, and 4 aspherical elements. An 11-blade rounded diaphragm and F22 minimum aperture expand creative aperture control, while the iris ring supports aperture-priority auto and manual exposure on compatible cameras.
Close focusing and practical controls
Focus as close as 23cm at the wide end and 55cm at telephoto, with a maximum magnification range of 1:3 to 1:4.7. The 55mm front filter thread, detachable bayonet hood, and camera-controlled Optical Stabilizer make this zoom ready for everyday shooting.
Built for changing conditions
Dust- and splash-resistant construction supports use in light rain, but the lens is not waterproof. When using a FUJIFILM X camera with selectable shutter types, Sigma recommends Electronic Shutter for sufficient image-stabilization effect.
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Pouch
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LH585-01 Lens Hood
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LCF-55 IV Front Cap
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LCR III Rear Cap
| Lens | |
|---|---|
| Focal Length | 50–120mm |
| Maximum Aperture | F2.8 |
| Minimum Aperture | F22 |
| Lens Construction | 18 elements in 13 groups (1 FLD, 3 SLD, 4 aspherical) |
| Diaphragm Blades | 11, rounded |
| Filter Size | 55mm |
| Focus and Stabilization | |
|---|---|
| Minimum Focusing Distance | 23cm at wide; 55cm at tele |
| Maximum Magnification | 1:3 to 1:4.7 |
| Image Stabilization | OS (Optical Stabilizer); camera-side ON/OFF control |
| FUJIFILM X Mount APS-C | |
|---|---|
| Angle of View | 31.7°–13.5° |
| Controls | Iris ring; some cameras may not support it |
| Dimensions | 66.8 × 99.3mm (diameter × length) |
| Weight | 390g / 13.8 oz |
| Construction and Compatibility | |
|---|---|
| Environmental Protection | Dust- and splash-resistant construction; suitable for light rain but not waterproof |
| Designed Format | APS-C mirrorless cameras |
| Full-Frame Mirrorless Use | Image circle does not cover the entire sensor; crop mode may be needed |
| Edition Number | C026 |
| Safety | |
|---|---|
| Built-in Magnet | Keep at least 5cm / 2 in from cardiac pacemakers and other medical devices; keep magnetic-stripe cards away |






