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31Depth 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 …
32Camera obscura — This article is about an optical device. For other uses, see Camera obscura (disambiguation) …
33Documentary photography — usually refers to a popular form of photography used to chronicle significant and historical events. It is typically covered in professional photojournalism, but it may also be an amateur, artistic, or academic pursuit. The photographer attempts… …
34Mount Meager — The Mount Meager volcanic complex rising above the Pemberton Valley. Summits left to right are Capricorn Mountain, Mount Meager proper and Plinth Peak …
35Blue Guitars — Infobox Album | Name = Blue Guitars Type = Album Artist = Chris Rea Released = August 30, 2005 Recorded = 2004 2005 Genre = Blues Label = Jazzee Blue Producer = Chris Rea, Andy Wilman Reviews = *Allmusic [http://www.allmusic.com/cg/amg.dll?p=amg… …
36telescope — /tel euh skohp /, n., adj., v., telescoped, telescoping. n. 1. an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms (refracting telescope) consists essentially of an objective lens… …
37photography, history of — Introduction method of recording the image of an object through the action of light, or related radiation, on a light sensitive material. The word, derived from the Greek photos (“light”) and graphein (“to draw”), was first used in the… …
38Charlie Chaplin — For other people named Charles Chaplin, see Charles Chaplin (disambiguation). Charlie Chaplin …
39Differential cryptanalysis — is a general form of cryptanalysis applicable primarily to block ciphers, but also to stream ciphers and cryptographic hash functions. In the broadest sense, it is the study of how differences in an input can affect the resultant difference at… …
40Diesel engine — Diesel engines in a museum Diesel generator on an oil tanker …
