This is a specially designed version of the motorized 500EL intended for use on the surface of the moon, where the first lunar pictures were taken on 20 July 1969 by Neil Armstrong. A glass plate (Reseau-Plate), provided with reference crosses which are recorded on the film during exposure, is in contact with the film, and these crosses can be seen on all the pictures taken on the moon from 1969 to 1972. The 12 HEDC cameras used on the surface of the moon were left there. Only the film magazines were brought back.
The Hasselblad cameras were selected by NASA because of their interchangeable lenses and magazines. Modifications were made to permit ease-of-use in cramped conditions and while wearing spacesuits, such as the replacement of the reflex mirror with an eye-level finder.
Modifications by NASA technicians were further refined and incorporated into new models by Hasselblad. For example, development of a 200 shot 70mm magazine was accelerated to meet the space programs needs.
The Data Camera was fitted with a so-called Reseau plate. The Reseau plate was made of glass and was fitted to the back of the camera body, extremely close to the film plane. The plate was engraved with a number of crosses to form a grid. The intersections were 10 mm apart and accurately calibrated to a tolerance of 0.002 mm. Except for the larger central cross, each of the four arms on a cross was 1 mm long and 0.02 mm wide. The crosses are recorded on every exposed frame and provided a means of determining angular distances between objects in the field-of-view.
The Data Camera was fitted with a new Zeiss Biogon lens, specially designed for NASA, which later became available commercially. Careful calibration tests were performed with the lens fitted in the camera in order to ensure high-quality, low-distortion images. Furthermore, the lens of the camera was fitted with a polarizing filter which could easily be detached.
This camera kit contains the following:
Special features of this model include:
-Highly accurate aspheric lens groups and elements
-magazine frame counter
-actual leaf aperture.
-all done in a conservative and economic polygon count. (no unnecessary sub-surfacing)
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