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Pentaprism

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Pentaprism
A multi sided glass prism housed in the roof of an single-lens reflex camera so that the image that's seen be the lens can be viewed through an optical viewfinder above the lens.



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Pentaprism
Edit Read more: Camera parts, Focusing system
Edited by Awcam
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A is a five-sided reflecting prism used to deviate a beam of light by a constant 90, even if the entry beam is not at 90 to the prism.

Pentaprism
Techniques Glossary Pentaprism
A multi sided glass prism housed in the roof of an single-lens reflex camera so that the image that's seen be the lens can be viewed through an optical viewfinder above the lens.


Optical device, found on SLR cameras, which corrects the image (reversed by the lens), allowing eye-level viewing and focusing via the viewfinder.
(see Finder, Focusing screen, & SLR )
Perspective control lens
(see Shift) ...

Pentaprism
The prism that sits on the top of most SLRs. The pentaprism transmits the light reflected upward by the camera's mirror into the camera's eyepiece.

Optical Viewfinder for 100% FOV and .95 magnification
Low profile glass viewfinder, with interchangeable focusing screens, achieves a 100% optical field of view for framing accuracy in a highly compact form factor.

PENTAPRISM - Five-sided prism in SLR cameras that renders a correctly-oriented view of the focusing screen.

- - optical device, usually fitted on 35mm cameras, which makes it possible to view the image while focusing. A mirror device laterally reverses the image so that the scene is viewed through the camera upright and the right way round.

Pentaprism (brighter)
So which camera is better depends, as always, on your needs. The consumer series cameras are inexpensive lightweight cameras and an excellent value for beginners and people on a budget.

A distinguishes the D7000 from it's lower-end cousins the D3100 and D5000, which use pentamirror viewfinders. s are heavier, and add to the cost of the camera, but offer a brighter viewfinder image.

html" } , { "Title" : "Focusing Screen" ,"GlossaryIcon" : "" ,"HideInGlossary" : "" ,"Summary" : "An element between the mirror and pentaprism or pentamirror in a single-lens-reflex camera.

1949: East German Zeiss develops the Contax S, first SLR with an unreversed image in a viewfinder
1955: Edward Steichen curates Family of Man exhibit at New York's Museum of Modern Art
1959: Nikon F introduced.

adjacent to the pentaprism
at the base of the lens mount
and many other places, depending on designer's will Usually, there is at least one silicon photo-diode.

It has three main elements: a hinged mirror, a matte focusing screen, and a five-sided glass prism called a The mirror, in the viewing position, is below the viewing screen and behind the lens.

Usually rest around the pentaprism of the camera (but some were designed around the film rewind knob). It has an electrical contact which mated with a contact in the mounting foot of the flash unit.

Cameras with a (as opposed to pentamirror) ensure that little light is lost before it hits your eye, however these often increase the cost of the camera significantly.

The penta mirror is an optical component equivalent to a pentaprism, of considerably reduced weight achieved by replacing a glass prism block with a combination of several mirrors.

There is a in there, a five sided mirrored glass element that turns the light right side up and not backwards by reflecting the light with the camera mirror and the .

Today, with the availability of high resolution display screens, the use of a mirror, pentaprism/pentamirror and viewfinder is obsolete.

The photographer views the viewfinder screen through a that makes the image eye-level and so that it appears right-side-up and not reversed.

Initially, the things that separated mid-range from entry-level DSLRs were a PC outlet to accommodate studio flash, a faster burst rate (usually more than 3fps), a higher-resolution LCD monitor, and a pentaprism viewfinder instead of a pentamirror ...

"The body of the 5D Mark III is largely unchanged from the Mark II's, but there are a few key differences. The lump on the top for example is a little larger and more rounded to accommodate the AF module which is 2.

This screen is viewed through the viewfinder and a glass pentaprism which turns the image the correct way up. Other camera functions such as light metering and flash control also operate through the camera lens.

The advantages include smaller, lighter bodies with fewer moving parts (there's no need for the mirror or used by SLRs) and full-time live view. This makes them easier to understand for users migrating up from a compact digital camera.

EVIL (Electronic Viewfinder Interchangeable Lens): EVIL is a term widely used to describe a type of digital, interchangeable-lens camera that, unlike a conventional single lens reflex camera, does not use a mirror system and pentaprism to direct ...

Subsequent accessory shoes have been built as part of the camera and usually reat on top of the camera's ; others are separate items that you mount on the camera body when you need them.

2 megapixel DX sensor, 39-point AF system, Expeed 2 image processor, ISO up to 25,600, magnesium alloy body, 2,016-pixel RGB metering sensor, 1080/24p video recording, 6 fps burst shooting, dual SD slots, and 100%, glass pentaprism viewfinder ...

See also: See also: Prism, Camera, Image, Finder, Light

Photography  Penta prism  Percentage solution

 
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