LEICA M MOUNTING 17 BLADES APERTURE CARL ZEISS BIOTAR T f/2.0 58mm CUSTOM LENS

  

BIOTAR T f/2.0 58mm lens. The lens has an adapter from Leica M39 (LTM) to Leica M (LM), which can be unscrewed. Moreover, the bubbles in pre-war Zeiss optics indicate the highest quality of optical glass.