Zeiss 5.6/1000 mm black last version Prakticar, Pentacon Six, M42, Exakta and Practica B
rare mirror lens for Pentacon Six, high quality and heavy construction (14kg) known as the "Stasi-Kanone" (Stasi canon), black version in near mint condition, with rear cap, hood, adapters for M42, Praktica B and Exakta, in original wooden box
