Voigtlaender ULTRON 1:2/10 cm Prototyp / Voigtlaender ULTRON 10 cm f/2 Prototype

Hitherto unknown prototype of an ULTRON 10 cm lens with blue lens coating. The lens head has no aperture (can be built-in), covers the 6x6 cm format and can therefore be easily adapted. Front element with minimal cleaning marks, some glass bubbles inside. Height 6,7 cm, rear element diameter 3,8 cm, front element diameter 5cm, the lens barrel marked „125" in yellow, small hand engravings alongside the barrel. The front and rear lens elements can be easily unscrewed.