Schneider Kreuznach lens Retina Xenon f/2.0 50mm, Serial No 4899061. Interchangeable front element of lens on Retina IIC and IIIC and reflex cameras. Interchangeable Front Element, Retina Xenon 50mm lens
Radionar 105mm lens, made by Schneider. Radionar lens: F:105mm, f/4.5, number 491292. Lens in 18mm tube with Leica thread. Four aperture discs f/5.6/8/11/16 fitted by unscrewing rear element. No focusing movement, but scale infinity to 6 feet, engraved on front lens rim. Radionar 105mm lens 1925-1935