Camera Price Comparison

Clarifications

1) " Camera" -- As it applies to Camera Price Comparison A camera is a device used to take images (usually photographs ), either singly or in sequence, with or without sound, such as with video cameras. The name is derived from camera obscura, Latin for "dark chamber", an early mechanism forprojecting images in which an entire room functioned much as the internal workings of a modern photographic camera, except therewas no way at this time to record the image short of manually tracing it. Cameras may work with the visual spectrum or other portions of the electromagnetic spectrum. Every camera consists of some kind of enclosed chamber, with an opening or aperture at one end for light to enter, and a recording or viewing surface for capturing the light at the otherend. This aperture is often controlled by an iris mechanism. While the aperture controls the amount of light that enters the camera during photographing, the shutter controls the length of time that the light hits the film. For example, in lower light situations, the shutter speed should be slower to allow the film to capture what littlelight is present. There are various ways of focusing a camera accurately. The simplest cameras have fixed focus and use a small aperture andwide-angle lens to ensure that everything within a certain range (usually around 3 meters - infinity) is in reasonable focus.This is usally the kind found on one-use cameras and other cheap cameras. The camera can also have a limited focusing range or scale-focus that is indicated on thecamera body. The user will guess the distance to the subject and adjust the focus accordingly. On some cameras this is indicatedby symbols (head-and-shoulders; two people standing upright; one tree; mountains). Rangefinder cameras focus by means of a coupled parallaxunit on top of the camera. Single-lens reflexcameras using the objective lens and a moving mirror to project the image onto a ground glass. Twin-lens reflex cameras use an objective len... 2) " Price" -- As it applies to Camera Price Comparison For people whose family name is Price see Price (disambiguation). In economics and business, theprice is the assigned numerical monetary value of a good, service or asset. The concept of price is central to microeconomics where it is one of the most important variables in resource allocation theory (also called price theory). Price is also central to marketing where it is one of the four variables in the marketing mix that business people use to develop a marketing plan. Historically, price value has superseded the barter value ofpre-monetary systems, in which bartering was used to determine a value of a good or service. Economists, strictly speaking, viewprice as an exchange ratio between goods. Thus it exists also in a barter system. From this point of view, price is akin to opportunity cost, that is, what you have to give up in exchange forthe good or service that you are purchasing. The price of an item is also called the price point, especially where it refers to stores that set a limited number of price points. For example, Dollar General is a general store or " five and dime " store that sets price points only at even amounts, such as exactlyone, two, three, five, or ten dollars (among others). Other stores (such as dollar stores, pound stores, euro stores, 100- yen stores, and so forth) only have a single price point (1$, 1£, 1€, 100¥), though in some cases this may getmore than one of some very small items. See also pricing price points unit of account value currency marketing microeconomics marketing mix production, costs, andpricing Compare (not to be confused with prize , what one wins in gambling or a competition ) ... 3) " Comparison" -- As it applies to Camera Price Comparison A comparison is an evaluation of similarities and differences - described by Gregory Bateson in hisbook Mind and Nature as the two quanta of experience. Contents 1 In computer programming 2 In grammar 3 In mathematics 4 Academic fields focusing on comparison 5 See also In computer programming In computer programming, when one compares the twovalues x and y, a negative number often indicates x < y, zero x == y and a positive number x> y. Even when two values are not integers, e.g. literal strings, this convention is largely adopted. For example, strcmp returns -1, 0, or 1 according to the lexicographical order, and qsort expects the comparison function to return valuesaccording to this convention. This is because it is efficient to do the subtraction x - y resulting in the directionalsigns above. In sorting algorithms, the efficiency of comparisoncode is critical since it is one of the major factors of sorting performance. Sometimes, particularly in object-orientedprogramming, the comparison raises questions of datatypes and inheritance, equality and identity. It is often necessary to distinguish between: two objects with different datatypes both related to another datatype, e.g. an orange and a lemon, both being citrusfruit two different objects of the same type, e.g. two hands two objects being equal but distinct, e.g. two $10 banknotes two different references to the same object, e.g. two nicknames for the same person Sameness and difference can be relative or graduated as well as absolute, particularly in fuzzy logic, artificialintelligence, signal processing, lossy data compression and pattern recognition. See also : regular expression In grammar Comparison, in grammar, is a property of adjectives and adverbs in most languages ; it describes systems that distinguish the degree t... 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