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The Hapo 45 is a roll film camera that was produced for Porst by Balda in 1937.
- Type: folding camera
- Films: 120 film
- Lens: Meyer Gorlitz Trioplan 1:4.5/100mm Schneider-Kreuznach Radionar 10.5cm f:4.5
- Shutter: Compur, speeds 1-1/250 sec.