Sony SEL 16-35mm Vario-Tessar T* f/4.0 ZA OSS full-frame wide-angle zoom was developed with Zeiss and features a constant f/4.0 aperture across the entire range. Zeiss T* anti-reflective coating significantly reduces flare and ghosting. Optical construction: 12 elements in 10 groups, including 5 aspherical elements (one large-diameter AA aspherical element) and 3 ED elements. This design effectively controls distortion, dispersion, and chromatic aberrations. Built-in OSS optical stabilization supports handheld shooting in low light. Included: Sony SEL 16-35mm Vario-Tessar T* f/4.0 ZA OSS lens, front and rear caps, lens hood, protective UV filter, transport pouch.