The Schneider-Kreuznach Tele-Arton 240mm f/5.5 is a telephoto-design large format lens with a 5-element, 4-group construction. With a 152mm image circle and 35-degree angle of view, it covers 4x5in format. At 800g with an M 49 filter thread, the telephoto design reduces the required bellows extension, making it useful for field cameras that cannot extend their bellows to the full 240mm that a conventional lens would require.