aperture mirror
51Micro Four Thirds system — The Micro Four Thirds system (MFT) is a standard created by Olympus and Panasonic, and announced on August 5, 2008,[1] for mirrorless interchangeable lens digital cameras and camcorders[2] design and development. However, unlike the preceding… …
52Telescope — A telescope is an instrument designed for the observation of remote objects and the collection of electromagnetic radiation. The first known practically functioning telescopes were invented in the Netherlands at the beginning of the 17th century …
53Amateur telescope making — The field of amateur telescope making is considered an offshoot of the amateur astronomy community. Amateur telescope makers (sometimes called ATMs), as their name implies, are not paid professionals. They build their telescopes for the enjoyment …
54Newton's reflector — A replica of Newton s second reflecting telescope that he presented to the Royal Society in 1672 described as the better of the two instruments Newton built[1]. The first reflecting telescope built by Sir Isaac Newton in 1668 …
55Pfund telescope — The Pfund telescope, originated by A. H. Pfund, provides another method for achieving a fixed telescope focal point in space regardless of where the telescope line of sight is pointed. This configuration utilizes a two axis feed flat mirror to… …
56Airy disk — Computer generated image of an Airy disk. The gray scale intensities have been adjusted to enhance the brightness of the outer rings of the Airy pattern …
57Minolta SR-T 101 — Type 35 mm SLR Lens mount Minolta SR bayonet (Meter Coupled) Focus Manual, micro prism with Fresnel lens provided in SLR finder …
58Science of photography — refers to the use of science, such as chemistry and physics, in all aspects of photography. This applies to the camera, its lenses, physical operation of the camera, electronic camera internals, and the process of developing film in order to take …
59Fresnel diffraction — In optics, the Fresnel diffraction equation for near field diffraction, is an approximation of Kirchhoff Fresnel diffraction that can be applied to the propagation of waves in the near field.[1] The near field can be specified by the Fresnel… …
60Pentax ME F — The Pentax ME F was an amateur level, interchangeable lens, 35 mm film, single lens reflex (SLR) camera. It was manufactured by Asahi Optical Co., Ltd. (called PENTAX Corporation since 2002) of Japan from November 1981 to 1984. The ME F was a… …
