Electronic viewfinder

An electronic viewfinder or EVF is a viewfinder where the image captured by the lens is projected electronically onto a miniature display. This article is about the definition for the short story by Raymond Carver, see Viewfinder (short story In Photography, a The image on this display is used to assist in aiming the camera at the scene to be photographed.

Operation

The sensor records the view through the lens, the view is processed, and finally projected on a miniature display which is viewable through the eyepiece. For the device for looking through a camera see Viewfinder. An eyepiece, or ocular lens, is a type of lens that is attached Electronic viewfinders in digital still cameras are very similar to those in video cameras. A Still camera is a type of Camera used to take Photographs Traditional cameras capture light onto Photographic film. A video camera is a Camera used for electronic Motion picture acquisition initially developed by the Television industry but now common in other applications

Electronic viewfinders in still photography

Electronic viewfinders have the following advantages over optical viewfinders:

Lack of parallax and ability to cope with high zoom-ratio lenses, without the need for a bulky reflex mirror. 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 Cameras with a separate optical viewfinder show the scene from a different viewpoint than that of the camera lens.
Information about the scene, such as a histogram, can be overlaid with the scene. In Statistics, a histogram is a Graphical display of tabulated frequencies, shown as Bars It shows what proportion of cases fall into each of
EVFs can show an approximation of the final exposure when they are exposure-priority.
EVFs can show a low-light scene brighter than it is when they are display-priority.
Most EVFs show 100% coverage of the final image.
EVFs provide a more accurate depiction of the contrast and tonal qualities that will appear in the final image.

Electronic viewfinders have the following limitations (2007):

There may be a noticeable lag between the changes in the scene and the electronic viewfinder display. Year 2007 ( MMVII) was a Common year starting on Monday of the Gregorian calendar in the 21st century.
The resolution of the display may be too low to allow for accurate manual focusing. The display resolution of a Digital television or Computer display typically refers to the number of distinct pixels in each dimension that can be displayed Focusing is a naturally occurring human process carefully observed and made teachable by philosopher and psychotherapist Eugene Gendlin. Some cameras assist in this by magnifying the center of the image or by outlining the edges of in-focus objects; even with this adaptation, manual focus using an EVF is more difficult than using a DSLR optical viewfinder.
In low-light conditions, an EVF display that does not auto-gain can be virtually blank, making it difficult to use. In practice, very few EVF displays do not auto-gain.
An EVF has high power consumption, usually equivalent to the main LCD screen.

Many professional photographers and advanced amateurs prefer digital single-lens reflex cameras which provide a traditional optical viewfinder (OVF). A photographer is a person who takes a Photograph using a Camera. A digital single-lens reflex camera ( digital SLR or DSLR) is a Digital camera that uses an automatic mirror system and Pentaprism 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 Beginning in 2006 some new digital SLR camera models provide both traditional through-the-lens viewing and a full-time "live preview" on the LCD display. Through-the-lens ( TTL) metering is a photographic term describing a feature of Cameras capable of measuring light levels in a scene In Digital photography, live preview is the feature that allows a Digital camera 's electronic display to be used as a Viewfinder, that is as a means of These include the Olympus E-330, E-410, E-510 and E-3, the Panasonic Lumix DMC-L1 and DMC-L10, the Leica Digilux 3, the Canon EOS 40D and the Canon EOS-1D Mark III. The Olympus E-330 is a DSLR launched on 30 january 2006, using the Four Thirds System lens mount standard The Olympus E-410 (or Olympus EVOLT E-410 in North America) is a 10 megapixel digital single-lens reflex (DSLR camera intended be the smallest and lightest The Olympus E-510 (or Olympus EVOLT E-510 in North America) is a 10 megapixel digital single-lens reflex (DSLR camera oriented to the "prosumer" The Olympus E-3 is the long-awaited successor to the Olympus E-1, which was launched in November 2003 The Lumix DMC-L1 is Panasonic 's first Digital single-lens reflex camera, and was announced in February 2006 The Lumix DMC-L10 is Panasonic 's second Digital single-lens reflex camera (DSLR a follow-up to the previous Lumix DMC-L1 model The Digilux 3 is a Digital single-lens reflex camera introduced by Leica on 14 September 2006. The Canon EOS 40D is a 101- Megapixel semi-professional Digital single-lens reflex camera. The EOS 1D Mark III is a professional 101 Megapixel Digital single lens reflex camera (DSLR camera body produced by Canon. Nikon Cameras that have this feature are the Nikon D3 and the Nikon D300

Operation

Electronic viewfinders in still photography

See also