Lancaster's Rover camera was the subject of British patent 15,495 of 1 October 1890 which described a detective camera with integral changing box whereby the unexposed plates were stored in the top of the camera and the exposed plates at the back. An internal flexible blind adjustable from the outside assisted in this process and gave three light-tight chambers. Lancaster's See-Saw shutter (British patent number 18,167 of 14 November 1889) is also used in the camera.
The Rover was produced in a variety of plate sizes from 3¼ x 3¼, 4¼ x 3¼, 5 x 4, 6½ x 4¾ and 7½ x 5 inches. Lancaster's advertising described it as 'one of the most perfect Cameras ever put in the market'.
The camera was sold from 1891 and was still being listed in the firm's catalogue of 1897. The Zoegraph camera was a twin lens version of the Rover.