#photography

• Aerophotographic — Relating to aerophotography, concerning aerial photography; executed through airborne photography from airplanes, helicopters, or drones. It refers to optical equipment, techniques, flight crafts, or mapping materials used in the process of capturing high-altitude images for military, geodetic, or journalistic purposes.
• Aerophotography — The technique of photographing the Earth's surface from high above, using special photographic cameras mounted on board airplanes, helicopters, satellites, or drones; the photographic image obtained through this process. It is widely used in topography, archaeology, meteorology, military espionage, and urban planning.
• Aerial surveyor — An engineer or technical specialist specializing in performing topographic surveys and field measurements through aerophotogrammetry; a specialist who interprets and planimetrically transposes photographs taken from aircraft to develop exact maps of the terrain. In an isolated instrumental sense, the term can also designate a complex optical device used for the stereoscopic restitution and rendering of aerial plates.
• Agfacolor — A historical commercial name assigned to a series of color photographic technologies and materials developed by the German company Agfa, based on the structure of chromatic film with substantive color couplers. Originally launched in 1936 as Agfacolor Neu, this structural process revolutionized the global film and photography industry by simplifying the processing of color films.
• Black-and-white — Combining, alternating, or exclusively utilizing the colors white and black; devoid of intermediate chromatic nuances, except for gray tones. In visual arts, cinematography, and photography, the term describes the traditional technique or aesthetic style of rendering images without colors, emphasizing contrasts, shadows, and highlights. As an adverb, it expresses the radical way of viewing or perceiving a situation in a dual manner.
• Amidol — A crystalline organic compound from the aminophenol class, structurally used as an exceptionally active photographic developing agent, chemically known as 2,4-diaminophenol dihydrochloride. It possesses the unique property of developing effectively in slightly acidic or neutral solutions without requiring the addition of strong alkalis, producing high-quality black-and-white photographic images with rich, deep black tones.
• Anaglyph — A stereoscopic image, photograph, or film structurally produced by superimposing two bidimensional images of the same subject, chromatically filtered through complementary colors (usually red for the left eye and cyan for the right eye). When viewed through a special pair of glasses with matching color filters, this visual assembly produces a perfect optical illusion of depth, relief, and three-dimensional spatiality in the observer's brain.
• Anamorphic — Pertaining to anamorphosis or anamorphism, referring to them, or producing a controlled optical distortion. In cinematography and photographic art, it describes a special system of lenses or objectives (anamorphic lenses) that compress an image with a very wide field of view onto a standard sensor or film, with the image then being decompressed during projection to provide a spectacular widescreen format without losing the frame's original resolution.
• Anastigmat — A complex optical system or photographic lens, composed of an assembly of multiple lenses with different refractive indices, mathematically calculated to simultaneously correct astigmatism, field curvature, and chromatic aberration. This type of high-precision lens allows perfect and uniform focusing of light rays across the entire surface of the focal plane, ensuring extremely sharp and undistorted images both at the center and the edges.
• Antihalation — Serving to prevent, reduce, or eliminate the formation of a parasitic halo around highly illuminated points on a photographic or radiographic image. In a technical sense, it refers to special films or light-absorbing layers applied to the film base to prevent the internal reflection of rays back through the emulsion.
• Antifog — A chemical substance added to developing solutions (developers) or a special treatment applied to black-and-white or color photographic films, designed to prevent or reduce parasitic fogging (the grayish or blurred unexposed area); preventing the appearance of fog on the photosensitive emulsion, ensuring sharp contrasts and high-quality images.
• Apochromat — A complex optical system consisting of multiple lenses made from different types of glass, capable of correcting chromatic aberration for three distinct wavelengths of the visible spectrum and spherical aberration for two wavelengths. This high-precision device ensures an identical focal point for red, green, and blue colors, completely eliminating parasitic color fringes from the edges of captured images.
• Apochromatic — Pertaining to an apochromat, relating to optical systems capable of simultaneously correcting chromatic aberrations for three primary colors; characterized by the absence of the secondary spectrum and delivering an image of extreme color fidelity. It applies to professional photographic lenses, high-end binoculars, and microscopes designed for advanced research.
• Argentotype — An archaic photographic process for obtaining positive images on paper sensitized with emulsions based on silver and iron salts. This early chemical system, structurally related to calotype and ferrotype, utilized the photosensitive properties of argentum to fix light reflections in warm brown and sepia tones, representing a pioneering stage in the evolution of 19th-century developing techniques.
• Background — The furthest plane in a visual composition, painting, photograph, or theatrical stage, which serves as a background for elements or characters in the foreground; figuratively, the term designates the hidden context, secondary position, or marginal background in which an event, idea, or person is placed.
• Astro — Initial combining form derived from the Greek 'astron' used to construct words related to stars, celestial bodies, or outer space. Used independently in modern colloquial language, technology, or hobbyist communities, the term designates astrophotography, stargazing equipment, or software platforms optimized for deep-sky imaging processing.
• Astrophotographic — Belonging to astrophotography, relating to astrophotography; referring to the techniques, equipment, or processes used for photographing celestial bodies and cosmic phenomena. This term also describes optical instruments (such as refractors or telescopes) specifically designed to project a flat and color-corrected image directly onto a digital camera sensor.
• Astrophotography — A specialized branch of practical astronomy and photographic art that deals with photographing celestial bodies, constellations, planets, and deep-sky objects (nebulae, galaxies, star clusters). It involves advanced long-exposure techniques, automated star tracking, and digital processing (stacking and calibrating frames) to reveal details invisible to the human eye due to extremely low luminosity.
• Astrograph — An astronomical refractor or telescope with a wide field of view, specifically designed and optimized for astrophotography, sky mapping, and astrometry. This optical instrument lacks an eyepiece for direct visual observation, instead focusing light directly onto a photographic plate (historically) or a large-scale electronic digital sensor (CCD/CMOS), enabling the precise recording of star and galaxy positions.
• Astrography — A descriptive branch of practical astronomy or an archaic terminological variant for astrophotography, having as its object the description, mapping, and cataloging of celestial bodies through images obtained using an astrograph. In a historical sense, it represents the technique of printing and faithfully reproducing star charts or photographic plates based on silver emulsion, used intensively in major international sky inventory projects of the 19th and early 20th centuries.