Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Telecompressor> ?p ?o. }
Showing items 1 to 25 of
25
with 100 items per page.
- Telecompressor abstract "A telecompressor or focal reducer is an optical element which amateur astronomers use to reduce the focal length of a telescope. Such devices are also available to photographers, for using lenses between systems with different sensor sizes.Mainly used for astrophotography, the telecompressor gives a wider angle of view, a sharper picture, and reduces the exposure time needed. These are useful when taking pictures of nearby large objects, such as nebulae. The effects and uses of the telecompressor are largely opposite to those of the teleconverter or barlow lens.One effect of a telecompressor that it reduces the diameter of the image circle. In practice this means that a lens meant for larger format can be used on a smaller sensor without crop factor. For example, a lens made for 135 format film (or "full frame") can be combined with a telecompressor to fill the image circle of a APS-C sized sensor. Without telecompressor the image on the APS-C sensor is cropped and some light is lost.".
- Telecompressor wikiPageID "15893489".
- Telecompressor wikiPageRevisionID "575752947".
- Telecompressor hasPhotoCollection Telecompressor.
- Telecompressor subject Category:Astronomical_instruments.
- Telecompressor subject Category:Photography_equipment.
- Telecompressor type Artifact100021939.
- Telecompressor type AstronomicalInstruments.
- Telecompressor type Device103183080.
- Telecompressor type Instrument103574816.
- Telecompressor type Instrumentality103575240.
- Telecompressor type Object100002684.
- Telecompressor type PhysicalEntity100001930.
- Telecompressor type Whole100003553.
- Telecompressor comment "A telecompressor or focal reducer is an optical element which amateur astronomers use to reduce the focal length of a telescope. Such devices are also available to photographers, for using lenses between systems with different sensor sizes.Mainly used for astrophotography, the telecompressor gives a wider angle of view, a sharper picture, and reduces the exposure time needed. These are useful when taking pictures of nearby large objects, such as nebulae.".
- Telecompressor label "Telecompressor".
- Telecompressor label "Telekompressor".
- Telecompressor label "减焦镜".
- Telecompressor sameAs Telekompressor.
- Telecompressor sameAs m.03qf14v.
- Telecompressor sameAs Q7696099.
- Telecompressor sameAs Q7696099.
- Telecompressor sameAs Telecompressor.
- Telecompressor wasDerivedFrom Telecompressor?oldid=575752947.
- Telecompressor isPrimaryTopicOf Telecompressor.