The Marshall V-ZCAM4 is a lens, mounting sleeve, special lens tips and a collection of adapter rings. The Marshall V-ZCAM4 lens may be attached to most standard consumer camcorders with included adapter rings. The 4 adapter rings are 37 mm, 30 mm, 27 mm and 30.5 mm. They attach to the camcorder by screw mounting onto the camera's filter screw at the front of the lens.
With this combination of pinhole lens and camcorder, the unit may be operated inside a bag, suitcase, behind a curtain, or inside a wall. The lens itself provides a wide 70° horizontal angle of view.