Sigma 70-200mm F2.8 DG DN OS Sports Lens

The Sigma 70‑200mm F2.8 DG DN OS | Sports is a top‑end telephoto zoom lens designed for full‑frame mirrorless cameras (Sony E‑mount and L‑mount). It belongs to Sigma’s “Sports” line, which means it emphasizes durability, speed, and optical performance. This lens is meant for demanding users: sports, wildlife, event, wedding, portraiture—any situation where you need fast autofocus, excellent sharpness, and good performance in challenging lighting.

Constant f/2.8 across the zoom range 70 to 200mm — ideal for low‑light, shallow depth of field, subject separation. 

OS2 Optical Stabilization with up to 7.5 stops correction at 70mm, 5.5 stops at 200mm. Also has a panning mode (Mode 2) for tracking moving subjects. 

Dual HLA (High‑response Linear Actuator) autofocus system with a floating focus design — two focus groups move to reduce aberrations and improve close‑focus performance. It also helps speed and accuracy. 

Internal zoom (length doesn’t change during zoom), which improves handling, balance, and weather sealing.

A robust build: weather/dust/splash resistant seals, water & oil repellent coating on the front element, sturdy materials (magnesium alloy tripod mount, etc.). 

Useful controls: aperture ring (with click switch and lock), focus limiter switch, zoom lock switch, 3 customizable AFL (or AF‑L) buttons, removable Arca‑Swiss compatible tripod collar/socket.

Compatible with teleconverters (for L‑mount version) — 1.4× and 2.0× options to extend reach.