Tamron 150-500mm f/5-6.7 Di III VC VXD Lens for Sony Full-Frame MirrorlessThe Tamron 11 20mm f 2. 8 Di III A2 RXD is a fast aperture ultra wide angle zoom lens for Sony E mount APS C mirrorless cameras. The lens features the worlds first f 2. 8 maximum aperture for Sony E mount APS C mirrorless in this category, and an amazing compact and lightweight design. The lens is so lightweight and compact that its hard to believe its a fast aperture ultra wide angle zoom lens. When used with a compatible Sony E mount APS C