Tamron : B011SE 18-200mm F/3.5-6.3 Di lll VC Sony B011 Black

Versatile wide-angle zoom is designed for full-frame Sony E-mount mirrorless cameras
Bright constant f/2.8 maximum aperture affords consistent brightness throughout the zoom range and offers improved control over depth of field
XLD (eXtra Low Dispersion) and LD (Low Dispersion) elements greatly reduce color fringing and chromatic aberrations throughout the zoom range in order to realize improved clarity and color accuracy

Features a redesigned optical system from its previous generation, the tamron 28-75mm f/2.8 di iii vxd g2 lens for sony e mount (a063s) is a compact bright standard zoom lens, for full-frame sony e-mount, ideal for portraiture and landscapes photography
Revamped optics yield higher resolution and improved sharpness over the previous generation and the focusing system has been replaced with a voice-coil extreme-torque drive mechanism that achieves faster, more precise performance to suit both stills and video applications
The fast constant f/2.8 maximum aperture affords consistent illumination throughout the zoom range and also affords greater control over depth of field for working with selective focus techniques