Schmidt camera Schmidt camera A Schmidt camera, also referred to as the Schmidt telescope, is a catadioptric astrophotographic telescope designed to provide wide fields of view with limited aberrations. The design was invented by Bernhard Schmidt in 1930. Some notable examples are the Samuel Oschin telescope (formerly Palomar Schmidt), the UK Schmidt Telescope and the ESO Schmidt; these provided the major source of all-sky photographic imaging from 1950 until 2000, when electronic detectors took over. A recent example is the Kepler spacecraft exoplanet finder. Other related designs are the Wright Camera and Lurie–Houghton telescope. The Schmidt camera was invented by German-Estonian optician
Gregorian Antiphonary respect it as a work thenceforward irreformable, as a traditional deposit which he refused to disturb and re-order. It is not easy to say, or even to convey an idea of, what this primitive edition of the antiphonary may have contained; but there can be no doubt that it contained in their actual order the Lenten communion-antiphons, and is certainly anterior to Gregory III and to Gregory II. This fact alone proves the existence of an antiphonal collection, known as the Gregorian antiphonary, prior to the time of Pope Gregory II. Gregorian Antiphonary The Gregorian Antiphonary was an early Christian