As well as the Transmitter Brown produced the Stereo Photoduplicon (BP 21406/1894), he also wrote a book on the subject and published stereoscopic images. The Transmitter received good reviews but could not have sold well. An improved model had a thumbscrew to alter the angle between the two mirrors for use when photographing subjects at different distances. The connecting bracket was also modified by adding several holes, to which the mirrors attach, allowing the lens to mirror distance to be altered. Around 1905 a version was introduced that attached to the front of the lens rather than the camera baseboard. Brown offered to replace the mirrors if they become damaged but to do so the serial number of the Transmitter was needed; presumably there were several changes made to the instrument. The price was 7/6.

A similar arrangement of mirrors was proposed by Gill and Newton in 1857 (BP 2903/1857).