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
Helmut Schmidt (parapsychologist) was appointed Research Director of the Institute in 1969. Schmidt's early psychokinesis experiments involved machines with one red and one green light. Subjects would attempt to make one light illuminate more than another. Schmidt has reported success rates of 1–2% above what would be expected at random over a large number of trials. Critics have written Schmidt's experiments in parapsychology have not been replicated. Schmidt worked alone with no one checking his experiments. He was accused of being a careless experimenter. The psychologist C. E. M. Hansel found flaws in all of Schmidt's experiments into clairvoyance, precognition and psychokinesis. Hansel