Emil Busch, Pantoskop n°4
Wide angle lens Pantoskop n° 4. This lens calculated by Emil BUSCH - Roja-Rathenow - includes two symmetrical lenses, separately achromatic, with very short radii of curvature. Around 170mm focal length. Announced to cover an image of 22 x 33 cm. No scratches, no fungus, no haze.