Sigma has announced two new Contemporary lenses for APS-C mirrorless cameras: the 16-300mm f/3.5-6.7 DC OS and the 50-120mm f/2.8.

The wider-ranging of the pair, the 16-300mm f/3.5-6.7 DC OS, is marketed by Sigma as the world's first 18.8x zoom. That range covers a 24-450mm equivalent field of view on most APS-C bodies, positioning it as a single-lens solution for travel, event and general assignment work where swapping glass costs time.

The second lens, the 50-120mm f/2.8, is a fast telephoto zoom. On APS-C it delivers an equivalent of roughly 75-180mm at a constant f/2.8 — a working range for portraits, sports and low-light coverage where variable-aperture superzooms fall short.

What do the two lenses cover between them?

Taken together, the announcements split Sigma's APS-C strategy across two use cases:

• 16-300mm f/3.5-6.7 DC OS — maximum versatility in one lens, with optical stabilization, at the cost of a slower variable aperture.
• 50-120mm f/2.8 — speed and subject separation in the classic portrait-and-action telephoto band.

Both carry Sigma's Contemporary designation, the company's tier aimed at compact, lower-cost optics rather than its Art line.

Why does this matter for working photographers?

For photographers already invested in APS-C mirrorless systems — Sony E, Fujifilm X and similar mounts — the 16-300mm consolidates an entire shoot's focal range into one lens. Event and travel shooters who bill by the assignment can weigh the convenience of never changing lenses against the optical compromises inherent in an 18.8x zoom ratio.

The 50-120mm f/2.8 fills a different gap. Constant-aperture f/2.8 zooms in this range have historically been scarce on APS-C, and the lens gives crop-sensor shooters a faster alternative in the segment where full-frame photographers default to 70-200mm f/2.8 glass.

Sigma has not yet published pricing or ship dates in the announcement materials available. Buyers evaluating either lens against first-party alternatives from camera makers will need those figures before making a purchase decision, and real-world optical tests will show whether the 16-300mm's extreme zoom ratio carries meaningful sharpness penalties at the long end.

Both lenses are announced products, not yet reviewed units; performance claims remain Sigma's own marketing until independent testing and hands-on reports arrive.