collodion- Aflamable, syrupy sollution.
daguerreotype- The first commercially successful photographic process.
etymology- The study of the history of words, their origin, and how their for and meanings have changed over time.
Anrhemius of tralles- A GREEK proffesser of geomotry in constantinople.
shutter- a photographic device that administers the exposure by limiting the time over which light is admitted.
exposure- the total amount of light allowed to fall on the sensor during the taking of a photograph.
Depth of field- The area within the depth of field appears sharp, while the areas in front of and beyond the depth of field appear blurry.
F- stop- Diagram of decreasing apertures, that is, increasing f-numbers, in one-stop increments; each aperture has half the light gathering area of the previous one.
Focal length-an optical system is a measure of how strongly the system converges (focuses) or diverges (defocuses) light.
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