- This article is about the definition, for the short story by Raymond Carver, see Viewfinder (short story)
In photography, a viewfinder is what the photographer looks through to compose, and in many cases to focus, the picture. Raymond Clevie Carver Jr ( May 25, 1938 &ndash August 2, 1988) was an American Short story Writer Viewfinder by Raymond Carver is one of the short stories in the "What We Talk About When We Talk About Love" compilation Photography (fә'tɒgrәfi or fә'tɑːgrәfi (from Greek φωτο and γραφία is the process and Art of recording pictures by means of capturing Most viewfinders are separate, and suffer parallax, while the more sophisticated single-lens reflex camera lets the viewfinder use the main optical system. Parallax is an apparent displacement or difference of orientation of an object viewed along two different lines of sight and is measured by the angle or semi-angle of inclination between The single-lens reflex (SLR Camera uses an automatic moving mirror system which permits the photographer to see exactly what will be captured by the film or digital imaging
Viewfinders are used in many cameras of different types: still and movie, film, analog and digital. A camera is a device used to capture images either as still Photographs or as sequences of moving images ( Movies or Videos. A zoom camera usually zooms its finder in synch with its lens.
Viewfinders can be optical or electronic. An optical viewfinder is simply a reversed telescope mounted to see what the camera will see. A telescope is an instrument designed for the observation of remote objects and the collection of Electromagnetic radiation. Its drawbacks are many, but it has one main advantage: it consumes no power. An electronic viewfinder is a CRT, LCD or OLED based display device. The cathode ray tube (CRT is a Vacuum tube containing an Electron gun (a source of electrons and a Fluorescent screen with internal or An Organic Light Emitting Diode ( OLED) also Light Emitting Polymer ( LEP) and Organic Electro Luminescence ( OEL) is any In addition to its primary purpose, an electronic viewfinder can be used to replay previously captured material and usually has an on-screen display. An on-screen display (abbreviated OSD) is an image superimposed on a screen picture commonly used by modern Televisions VCRs and DVD players
It is not uncommon for a camera to have two viewfinders. Here are two examples:
- A digital still camera may have an optical viewfinder and an electronic one. The latter can be used to replay previously captured material, has an on-screen display, and can be switched off to save power. An on-screen display (abbreviated OSD) is an image superimposed on a screen picture commonly used by modern Televisions VCRs and DVD players
- A camcorder may have two viewfinders, both electronic. A camcorder is a portable Consumer electronics device for recording Video and audio using a built-in recorder unit The first is viewed through a magnifying eyepiece. The second viewfinder is a mounted on the side of the camera and projected on a CRT or LCD-screen. Because it consumes more power, a method is often provided to turn it off to save energy.
Some special purpose cameras do not have viewfinders at all. These are, for example, web cameras and video surveillance cameras. Webcams ( web cameras) are small cameras (usually though not always Video cameras, whose images can be accessed using the World Wide Web, instant Closed-circuit television ( CCTV) is the use of Video cameras to transmit a signal to a specific place limited set of monitors They use external monitors as their viewfinders. A visual display unit, often called simply a monitor or display, is a piece of Electrical equipment which displays images generated from the Video
See also
An electronic viewfinder or EVF is a Viewfinder where the image captured by the lens is projected electronically onto a miniature display The waist-level finder is an alternative to the eye-level Viewfinder. A Finderscope is a small auxiliary Telescope mounted atop the main astronomical telescope and pointed in the same directionDapyx Software network: MP3 Explorer | Ebook Manager | Zenithic