“Praktica”, “Carl Zeiss Jena”, “Pentacon” or “Meyer Optik Görlitz” are very well known brands in East Germany and beyond. When I started with photography, my first camera was a Praktica. On Berlin flee markets you can find them quite often. Carl Zeiss Jena lenses, which are often coupled with Praktica cameras, are still a nice choice as adapted vintage lenses on modern digital cameras.