Hypergraph telescope

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A hypergraph telescope is a reflector telescope that is constructed similarly to a Cassegrain telescope ( parabolic primary mirror , hyperbolic secondary mirror ).

In order to increase the optical quality for photography, a system of correction lenses , the so-called corrector, is inserted into the beam path behind the secondary mirror in the Hypergraph, as in the Ritchey-Chrétien-Cassegrain telescope (RC telescope) . For a further increase in performance compared to the RC telescope, the hyperbola of the secondary mirror is also adjusted on the Hypergraph. This explains the naming and is particularly important for photographs on larger films (e.g. medium format ) or CCD chips, in order to guarantee optimum sharpness across the entire image field.

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