This converted camera as once published in Sovietskoe Foto, enlighted Mr. David Kravtsov of Novosibirsk, Together Mr. Vladimir Semenov, they begun studying and trying to make single frame rastered pictures process. So it was born the Vario-Stereo company. This fascinating story is told in http://www.photohistory.ru/Vario-stereo.html In the second picture Mr. David Kravtsov with the original Smena Stereo in 1969