Pro-Level Zoom with Speed & Stability: The Sigma 70-200mm f/2.8 DG DN OS Sports Lens delivers fast autofocus with dual HLA motors and up to 7.5 stops of stabilization via OS2. Its constant f/2.8 aperture performs beautifully in low light while weather-sealed build, and advanced features like a locking aperture ring and tripod collar make it ideal for pros shooting sports, wildlife, or events. Clear Protection with Optical Precision: The Tiffen 77mm UV Protector Filter reduces UV haze for sharper outdoor shots, especially at high altitudes or near water. With no added color or contrast, its perfect for everyday lens protection against dust, moisture, and scratchescrafted with precision ColorCore technology.