Schmidt camera optical axis of the Schmidt design creates a Schmidt-Newtonian telescope. The addition of a convex secondary mirror to the Schmidt design directing light through a hole in the primary mirror creates a Schmidt-Cassegrain telescope. The last two designs are popular with telescope manufacturers because they are compact and use simple spherical optics. A short list of notable and/or large aperture Schmidt cameras. 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
Gregorian Institute of Paris advantage of its newsletter, from which some of the elements were taken up by the journal. The director of the magazine was the first teacher of Gregorian chant, Dom Gajard. It was thanks in particular to the dynamism of his teacher Auguste Le Guennant, who helped restore several journals, despite a difficult period after the war. By promoting many Gregorian teachings such as Gregorian sessions, he turned his institute into a true Gregorian pedagogical centre. When they arrived in Rome in April 1964, the delegates of the Institute and its schola were congratulated by Pope Pius VI for their contribution