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
Types of municipalities in Quebec Types of municipalities in Quebec The following is a list of the types of local and supralocal territorial units in Quebec, including those used solely for statistical purposes, as defined by the Ministry of Municipal Affairs, Regions and Land Occupancy and compiled by the Institut de la statistique du Québec. Not included are the urban agglomerations of Quebec, which, although they group together multiple municipalities, exercise only what are ordinarily local municipal powers. A list of local municipal units in Quebec by regional county municipality can be found at List of municipalities in Quebec. All municipalities (except cities), whether township,