The 110mm Cone for Harman Titan 4 x 5" Pinhole Camera from Ilford is an interchangeable cone for for these unique cameras and provides a 110mm focal length which is approximately equivalent to a 33mm focal length in the 35mm format. It offers a 73° angle of view. The diameter of its pinhole is 0.44mm and its aperture is f/250. The cone is made of molded ABS plastic with a durable, non-slip coating.
Ilford 110mm Cone for Harman Titan 4 x 5" Pinhole Camera