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 Masses monk of the great Abbey of Cluny in the 11th century attested that such Masses were said daily in that period, with the exception of the major feastdays of the year, such as Easter. In the modern era, the practice was authorized for all churches throughout the world. Gregorian Masses The practice of Gregorian Masses is an ancient tradition in which it is believed that a continuous series of thirty Masses would release the soul of a deceased person from the punishments of Purgatory. The history of the “Thirty Mass” practice goes back to the year 590 A.D. in St.