Zeiss Ikon Nettar 518/16

6x6 medium format folding camera with a 75mm lens which is equivalent to a 50mm lens in 35mm photography. The Nettar 518/16 has a double exposure prevention mechanism which is very handy. A red flag appears in the finder and you cannot press the shutter button without winding the film. You'll love that, believe me. I have bitter experience from my box camera where double exposures are more than often.