work aperture
51Optical telescope — Eight Inch refracting telescope (Chabot Space and Science Center) An optical telescope is a telescope which is used to gather and focus light mainly from the visible part of the electromagnetic spectrum for directly viewing a magnified image for… …
52Paul Strand — Infobox Artist bgcolour = #6495ED name = Paul Strand imagesize = caption = Wall Street , 1915 birthname = birthdate = birth date |1890|10|16| location = New York City deathdate = death date and age |1976|3|31|1890|10|16| deathplace = nationality …
53ESEM — stands for environmental scanning electron microscope. This is a scanning electron microscope (SEM) that allows a gaseous environment in the specimen chamber. Whereas all conventional microscopes operate in vacuum, the ESEM has added a new… …
54Microform — For other uses, see Microform (disambiguation). Digital scanning of microfilm (see Digital conversion below). Microforms are any forms, either films or paper, containing microreproductions[1] of documents for transmission, storage, reading, and… …
55Canon New F-1 — The Canon New F 1 replaced the F 1n (an upgraded F 1) as Canon s top of the line 35mm single lens reflex camera in 1981. Like the earlier models, the New F 1 takes FD mount lenses. Although no date has ever been confirmed, it is thought that the… …
56Locations in the Half-Life series — The Half Life series of video games features many locations set in an dystopian future stemming from the events of the first game, Half Life . These locations are used and referred to throughout the series. The locations, for the most part, are… …
57Contarex — The Contarex of 1958 1966 Type 35mm SLR camera Lens mount Contarex bayonet Focus lens helical Exposure 24 × 36mm on 35mm film …
58George Biddell Airy — Infobox Scientist box width = 300px name = Sir George Biddell Airy, FRS image width = 240px birth date = birth date|1801|07|27 birth place = Alnwick, Northumberland, England death date = death date and age|1892|01|02|1801|07|27 death place =… …
59Geophysical MASINT — is a branch of Measurement and Signature Intelligence (MASINT) that involves phenomena transmitted through the earth (ground, water, atmosphere) and manmade structures including emitted or reflected sounds, pressure waves, vibrations, and… …
60laser — /lay zeuhr/, n. Physics. a device that produces a nearly parallel, nearly monochromatic, and coherent beam of light by exciting atoms to a higher energy level and causing them to radiate their energy in phase. Also called optical maser. [1955 60; …
