The Exa 1b is a 35mm film SLR camera, manufactured by VEB Pentacon, former East Germany, and produced between 1977-85. It is a continuing model of the long lasting Ihagee Exa series by Pentacon.
VEB Pentacon licensed the production of screw-mount Exas to Certo Camera Werk, Dresden-Großzsachwitz, a part of VEB Pentacon. Cameras built by Certo have serial numbers preceded with a letter C. Some late Exa 1b version 4.4 and all Exa 1c version 4.5 made by Certo. [1] The later models of Exa 1b have black plastic top- and bottom plates.
Exa 1b body is virtually identical to Exa Ia except rewind knob replaced with a crank and the lens mount is M42, instead of the traditional Exakta bayonet mount. The camera also has internal aperture coupling for M42 automatic lenses.
Exa 1b uses most standard Exakta viewfinders, waist-level and prism. Standard lens is Meyer Domiplan, other main lenses are Tessar, Makinon and Super Takumar.
Exa 1b is not a real part of the Exakta/Exa system, although its family relationship with Exa cannot be denied. Exa 1b renamed as Exa 1c without practically any other changes.
There are 4 versions of the Exa 1b according to Andrzej Wrotniak
Specifications
This data belongs to the version 4.1 in the photos.
Lens release: simply screw counter clockwise
Focusing: simple matte glass screen,
Shutter: Mirror acts like a curtain as a part of the shutter, vertical moving, due to this maximum speed is limited to 1/175; half-depression of the shutter release allows a depth of field preview.
Speeds: 1/30-1/175 +B setting: dial under the rewind crank knob
Shutter release: on the left front of the camera, w/cable release socket
Cocking lever: also winds the film, short stroke
Frame counter: on the cocking lever knob, regressive type, manual setting
Viewfinder: eye level SLR pentaprism, interchangeable
Finder release: by a small lever on the back of top plate, turn it left and pull-up the finder
Mirror: not instant return. Mirror is actually a part of the shutter mechanism. When the shutter released, the mirror goes up as in a conventional SLR, but when the exposure is over, a second cover rotates upward to block the light. There is no real shutter curtain.
Flash PC socket: M and X, setting with the speeds knob
Back cover: removable with the bottom plate, opens by a thumb wheel on the bottom plate
Film loading: special take-up spool, removable
Others: Memory dial; Tripod socket 1/4 inch; Strap lugs; Engaving on the back cover: Made in G.D.R.
Body: metal; Weight:
Mount: M42 screw mount
There is a standard M42 type arc/lever on the body, that depresses the pin on the lens that closes the diaphragm blades. When the pressure is let up, the lens opens fully again. A half-depression of the shutter release allows a depth of field preview.
Aperture: f/2.8-f/22
Focus range: 0.75-12m +inf
