Tamron 70-300mm F/4.5-6.3 Di III RXD for Sony Alpha Cameras

The 70-300mm F/4.5-6.3 Di III RXD is the world's smallest and lightest telephoto zoom lens for Sony E-mount full-frame mirrorless cameras. It measures 5.8 in. in length, weighs 19.2 oz. and has a maximum diameter of 77mm. Currently "in development", this lens is planned for release in Autumn 2020.