The Rolleiflex 2.8A model K7A of 1950 is the first one with the larger aperture Zeiss Opton Tessar taking lens and a Heidoscop viewing lens.
The first version uses a Compur Rapid X shutter with speeds of 1 - 1/400 sec., B, X-sync. But does not have M-sync. The second version released a year later in 1951 uses Compur Rapid MX shutter with speeds of 1 - 1/500 sec., B, M-X-sync. Bay II filter are used.
Production : from 1949 to 1951, about 9.870 units. Almost entirely sold to the USA.
Format : 12 exposures of 6 x 6 cm on 120 type rollfilm.
Furthermore a Plate adapter for sheet film and a Rolleikin adapter for 35mm film cartridges can be used.
Lens: Carl Zeiss Jena Tessar 1:2.8 f=80mm, coated.
or : Zeiss Oberkochen Opton Tessar 1:2.8 f=80mm, coated.
Viewing lens: O.A.S. Heidoscop-Anastigmat 1:2.8 f=80mm, coated
Filter Bayonet : Both lenses, size 2.
Parallax error correction.
Shutter: Compur-Rapid X CR0 leafshutter. Speeds 1 to 1/400 sec.(later to 1/500 sec.) and B.
Flash synchronization : Sync socket on frontpanel. X synchronization, later also M-synchronization.
Double exposure prevention
Color Lacquer : Black
Color Leatherette : Black
Dimensions WxDxH: 94 x 104 x 143 mm
Weight: 1080 grams