I am selling a very well preserved, fully functional and clean normal photo lens Carl Zeiss Jena DDR Pancolar auto 1.8/50 MC. It fits to M42 screw mount cameras (Praktica, Yashica, Pentax, ricRocih, Chinon, Zenit, Revie, Porst...). With proper adapter it can be successfuly used also on most mirorless cameras.