Sony is poised to unleash a 55-300mm f/4.5-5.6 A-mount lens.

Designed to be used on cameras with an APS-C-size imaging sensor, the lens delivers a maximum focal length of 450mm, in 35mm viewing angle terms.

Due out in mid-September, the DT55-300mm f/4-5-5.6 SAM (Smooth Autofocus Motor) optic includes an Extra-Low Dispersion element.

A price has not been released.