lens ring
61Nikon F2 — Photomic (DP 1 prism) Type 35 mm SLR camera Lens mount Nikon F mount Focus manual Exposure manual …
62Contarex — The Contarex of 1958 1966 Type 35mm SLR camera Lens mount Contarex bayonet Focus lens helical Exposure 24 × 36mm on 35mm film …
63Sundial — A sundial is a device that measures time by the position of the Sun. In common designs such as the horizontal sundial, the sun casts a shadow from its style (a thin rod or a sharp, straight edge) onto a flat surface marked with lines indicating… …
64Olympus OM system — The Olympus OM System was a line of 35mm single lens reflex cameras, lenses and accessories sold by Olympus between 1972 and 2002 (some accessories were sold through early 2003). The system was introduced by Olympus in 1972, more than a decade… …
65Airy 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 …
66Dalek variants — …
67Metamaterial — Negative index metamaterial array configuration, which was constructed of copper split ring resonators and wires mounted on interlocking sheets of fiberglass circuit board. The total array consists of 3 by 20×20 unit cells with overall dimensions …
68Gravitational microlensing — Gravitational Lensing Formalism Strong lensing …
69photoreception — photoreceptive, adj. /foh toh ri sep sheuhn/, n. the physiological perception of light. [1905 10; PHOTO + RECEPTION] * * * Biological responses to stimulation by light, most often referring to the mechanism of vision. In one celled organisms such …
70Negative index metamaterials — A negative index metamaterial causes light to refract, or bend, differently than in more common positive refractive index materials. Negative index metamaterials or negative index materials (NIM) are artificial structures where the refractive… …
