Focusing screen
A ground glass screen fixed to the camera at the image forming plane, enabling the image to be viewed and focused.
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Focusing Screen
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New Nikon focusing screen and tweezers
Next comes removing the old screen. At the bottom of this article is a diagram of what you should find inside your camera.
Interchangeable focusing screen
Many SLRs and medium-format cameras have interchangeable focusing screens. The benefit is that you can swap the standard split screen for a different pattern to suit the type of photography you are doing.
Focusing screen
Glass or plastic screen set at the camera's image-forming plane, where the image can be viewed and focused.
(see Finder) ...
Focusing screen
Used for focusing on a subject or composing a picture; the focusing screen is located at a position equivalent to that of the film plane.
Focusing screen
Sports finder (area outside sensor coverage is shown darker)
Focusing screen information ...
loupe - a small, mounted magnifying glass; sometimes fitted in cameras (e.g. TLRs) to magnify the focusing screen.
macro
magazine camera - old type of box camera for plates or film sheets ...
formed directly on the ground glass or focusing screen, the lens forms the image on a mirror that reflects the image to the focusing screen or ground glass. TWIN-LENS REFLEX.
of the optical components of an SLR shows how the light passes through the lens assembly (1), is reflected into the pentaprism by the reflex mirror (which must be at an exact 45 degree angle) (2) and is projected on the matte focusing screen ...
If your camera has a removable focusing screen, now's the time to remove and clean it with a microfiber cloth, as you would a lens-but lay off any lens cleaner (as we'll soon explain). No changeable screen?
A twin-lens reflex has two lenses (the twin lens) and a mirror to bounce the light from one of them onto a ground-glass focusing screen (the reflex). Lacking a prism, a TLR tends to be lightweight.
Split-Image Rangefinder A focusing screen focus aid, comprising two prisms with their faces angled in opposite directions. Even a slightly out-of-focus image will appear split, enabling you to adjust for accurate focus.
FOCUSING HOOD - A cowl around focusing screens that shields the screen from light other than the light from the scene being photographed..
FOCUSING MAGNIFIER - A simple magnifying lens that enlarges the image on a focusing screen.
Penta prism: Five sided prism used to give correct viewing of the image and reflect it on to the focusing screen.
Perspective: System of representing three dimensional objects on a two dimensional surface to give realistic impression of depth.
This mirror reflects the light coming through the lens onto a focusing screen. Above the focusing screen a pentaprism is placed which enables the viewer to see the picture straight and the right way up.
An illuminated plus sign (over exposure), minus sign (under exposure) or a zero (OK) symbol to the side of the focusing screen.(The bit where you look at your picture) in the viewfinder.
SLR, which stands for single-lens reflex, refers to a type of camera that employs a rotating mirror (either a pentaprism or a pentamirror) that reflects the image that comes through the lens onto a focusing screen.
Focusing hood
A light proof cowl used on TLR and most roll film SLR cameras to prevent extraneous light falling on the focusing screen.
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A camera that utilizes a prism and mirror system to project the image seen by the lens onto a focusing screen located below the prism housing. The image the user sees in the viewfinder is identical to the image being recorded.
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TTL metering systems in which the camera simulates the effect of stopping down the lens when the aperture ring is turned, while leaving the diaphragm at full aperture to give full focusing screen brilliance.
Mirror. A polished metallic reflector set inside the camera body at a 45-degree angle to the lens to reflect the image up onto the focusing screen. When a picture is taken, the mirror moves so that light can reach the film.
A weird little camera that was basically an EOS 1000/Rebel with the topdeck LCD and the autofocus and TTL flash circuitry taken out. You have to focus manually using a split-circle focusing screen.
Reflex: A camera design using mirrors or prisms to reflect the scene onto a ground glass focusing screen.
Most only use the inner 3/4 and this is weighted towards the centre. Some have spot metering which only uses the inner 2-5% of the focusing screen, which is very useful for precise readings off smaller objects.
We tackle more great reader questions in this episode including what version of Adobe Photoshop is right for you, why so few compact cameras have filter threads, what happened to split focusing screen Read more ...
Reflex camera. Camera with viewfinder system using a mirror and focusing screen.
Some autofocus cameras will give you an audible or visible focus confirmation when the subject is in focus; use it. Otherwise, if you find yourself focusing manually on autofocus cameras, you may want to install a manual focusing screen for it, ...
 See also: Focusing, Focus, Camera, Image, Finder
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