This auction is for a PANTAR 1:4 f=75mm SUPPLEMENTARY LENS FOR ZEISS CONTAFLEX ALPHA, BETA and PRIMA CAMERA According to my research, the front element of the Pantar 45mm f:2.8 three-element lenses could be interchanged with others for 30mm f:4 and 75mm f:4. These could also be used on the Contina III 35mm viewfinder camera.?
