Reflex finder

Reflex finder

A reflex finder is a viewfinder system with a mirror placed behind a lens. The light passing through the lens is reflected by the mirror to a ground glass. The image formed on this ground glass can be observed directly, giving a "waist-level reflex finder," or through a redressing optical device (set of mirrors or prism) for eye-level viewing, giving an "eye-level reflex finder".

With a reflex finder, you can focus the image on the ground glass and frame your picture at the same time. It is common to find a device on the center of the ground glass to help precise focusing, for example a split-image or a microprism device. Today's reflex cameras usually incorporate autofocusing.

Reflex finders are found in:
* Single-lens reflex (SLR) cameras, with one lens for both viewing and taking the picture
* Twin-lens reflex (TLR) cameras, with one lens for viewing and one lens for taking the picture


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • History of the single-lens reflex camera — The history of the single lens reflex camera predates the invention of photography in 1826/27 by one and a half centuries with the use of a reflex mirror in a camera obscura first described in 1676. Such SLR devices were popular as drawing aids… …   Wikipedia

  • Single-lens reflex camera — 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 system, as opposed to non SLR cameras where the view through the… …   Wikipedia

  • Twin-lens reflex camera — A twin lens reflex camera (TLR) is a type of camera with two objective lenses of the same focal length. One of the lenses is the photographic objective (the lens that takes the picture), while the other is used for the waist level viewfinder… …   Wikipedia

  • Edixa Reflex — Infobox camera camera name = Edixa Reflex type = 35 mm SLR lens mount = Screw (M42) focus = manual exposure = flash = frame rate = dimensions = The Edixa Reflex cameras were West Germany s most popular own series of SLR s with focal plane shutter …   Wikipedia

  • Automated Planet Finder — The Automated Planet Finder Telescope (APF) is a fully automated 2.4 meter optical telescope under construction at Lick Observatory designed to search for extrasolar planets in the range of five to twenty times the mass of the Earth.The telescope …   Wikipedia

  • Optical View Finder — Dans les appareils photo reflex, le viseur est optique, permettant de voir l image qui passe à travers l objectif de l appareil. On retrouve dans le jargon photographique l abréviation OVF. En opposition avec l OVF, on trouve l Electronic View… …   Wikipédia en Français

  • Electronic View Finder — Dans les appareils photographiques reflex, l image dans le viseur de l appareil reflex est recréée à l aide d un mini écran LCD Une meilleure alternative est la visée optique (OVF). Article connexe Oculaire Portail de la photographie …   Wikipédia en Français

  • photography, technology of — Introduction       equipment, techniques, and processes used in the production of photographs.  The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …   Universalium

  • Contarex — The Contarex of 1958 1966 Type 35mm SLR camera Lens mount Contarex bayonet Focus lens helical Exposure 24 × 36mm on 35mm film …   Wikipedia

  • Minolta SR-2 — c.1958 Type 35mm SLR camera Lens mount Minolta SR The name Minolta was first used in 1932 on the 4.5×6 format Semi Minolta using 120 film. The manufacturer was established in November 1928 by Kazuo Tashima (1899 1985) as the Nichidoku Shashinki… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”