The Contaflex Alpha and Contaflex Beta, both introduced in 1957, were based on the same body but equipped with a Zeiss Pantar 45mm f:2.8 three-element lens and a Prontor Reflex shutter up to 1/300. They were the cheaper models of the line. The Alpha had no meter and the Beta had the selenium meter of the II and IV.
The front element of the lens could be interchanged with others for 30mm f:4 and 75mm f:4. These could also be used on the Contina III 35mm viewfinder camera.