Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Focal_length> ?p ?o }
- Focal_length abstract "The focal length of an optical system is a measure of how strongly the system converges or diverges light. For an optical system in air, it is the distance over which initially collimated rays are brought to a focus. A system with a shorter focal length has greater optical power than one with a long focal length; that is, it bends the rays more sharply, bringing them to a focus in a shorter distance.In most photography and all telescopy, where the subject is essentially infinitely far away, longer focal length (lower optical power) leads to higher magnification and a narrower angle of view; conversely, shorter focal length or higher optical power is associated with a wider angle of view. On the other hand, in applications such as microscopy in which magnification is achieved by bringing the object close to the lens, a shorter focal length (higher optical power) leads to higher magnification because the subject can be brought closer to the center of projection.".
- Focal_length thumbnail Focal-length.svg?width=300.
- Focal_length wikiPageID "82269".
- Focal_length wikiPageLength "13664".
- Focal_length wikiPageOutDegree "66".
- Focal_length wikiPageRevisionID "682178620".
- Focal_length wikiPageWikiLink 135_film.
- Focal_length wikiPageWikiLink 35_mm.
- Focal_length wikiPageWikiLink 35_mm_equivalent_focal_length.
- Focal_length wikiPageWikiLink 35_mm_film.
- Focal_length wikiPageWikiLink Angle_of_view.
- Focal_length wikiPageWikiLink Camera_lens.
- Focal_length wikiPageWikiLink Cardinal_point_(optics).
- Focal_length wikiPageWikiLink Category:Geometrical_optics.
- Focal_length wikiPageWikiLink Category:Length.
- Focal_length wikiPageWikiLink Category:Science_of_photography.
- Focal_length wikiPageWikiLink Collimated.
- Focal_length wikiPageWikiLink Collimated_light.
- Focal_length wikiPageWikiLink Concave_mirror.
- Focal_length wikiPageWikiLink Convex_mirror.
- Focal_length wikiPageWikiLink Crop_factor.
- Focal_length wikiPageWikiLink Curved_mirror.
- Focal_length wikiPageWikiLink Depth_of_field.
- Focal_length wikiPageWikiLink Digital_camera.
- Focal_length wikiPageWikiLink Dioptre.
- Focal_length wikiPageWikiLink Distortion_(optics).
- Focal_length wikiPageWikiLink F-number.
- Focal_length wikiPageWikiLink Field_of_view.
- Focal_length wikiPageWikiLink Film_format.
- Focal_length wikiPageWikiLink Focal_plane.
- Focal_length wikiPageWikiLink Focus_(optics).
- Focal_length wikiPageWikiLink Full-frame_digital_SLR.
- Focal_length wikiPageWikiLink Image.
- Focal_length wikiPageWikiLink Image_distortion.
- Focal_length wikiPageWikiLink Lens_(optics).
- Focal_length wikiPageWikiLink Light.
- Focal_length wikiPageWikiLink Magnification.
- Focal_length wikiPageWikiLink Microscopy.
- Focal_length wikiPageWikiLink Mirror.
- Focal_length wikiPageWikiLink Nodal_point.
- Focal_length wikiPageWikiLink Normal_lens.
- Focal_length wikiPageWikiLink Optical_power.
- Focal_length wikiPageWikiLink Optics.
- Focal_length wikiPageWikiLink Photographic_lens.
- Focal_length wikiPageWikiLink Photography.
- Focal_length wikiPageWikiLink Pinhole_camera.
- Focal_length wikiPageWikiLink Pinhole_camera_model.
- Focal_length wikiPageWikiLink Principal_plane.
- Focal_length wikiPageWikiLink Radius_of_curvature_(optics).
- Focal_length wikiPageWikiLink Ray_(optics).
- Focal_length wikiPageWikiLink Rectilinear_lens.
- Focal_length wikiPageWikiLink Refractive_index.
- Focal_length wikiPageWikiLink Sign_convention.
- Focal_length wikiPageWikiLink Sphere.
- Focal_length wikiPageWikiLink Surface_vertex.
- Focal_length wikiPageWikiLink Telephoto_lens.
- Focal_length wikiPageWikiLink Telescope.
- Focal_length wikiPageWikiLink Telescopy.
- Focal_length wikiPageWikiLink Thin_lens.
- Focal_length wikiPageWikiLink Wide-angle_lens.
- Focal_length wikiPageWikiLink File:Focal-length.svg.
- Focal_length wikiPageWikiLink File:Thick_Lens_Diagram.svg.
- Focal_length wikiPageWikiLink File:Thin_lens_images.svg.
- Focal_length wikiPageWikiLinkText "Back focal direction".
- Focal_length wikiPageWikiLinkText "Effective Focal Length".
- Focal_length wikiPageWikiLinkText "Focal Length (of a lens)".
- Focal_length wikiPageWikiLinkText "Focal length".
- Focal_length wikiPageWikiLinkText "Focal_length".
- Focal_length wikiPageWikiLinkText "Front focal distance".
- Focal_length wikiPageWikiLinkText "depth of focus".
- Focal_length wikiPageWikiLinkText "effective focal length".
- Focal_length wikiPageWikiLinkText "eyepiece focal length".
- Focal_length wikiPageWikiLinkText "f".
- Focal_length wikiPageWikiLinkText "focal length ratio".
- Focal_length wikiPageWikiLinkText "focal length".
- Focal_length wikiPageWikiLinkText "focal lengths".
- Focal_length wikiPageWikiLinkText "focal range".
- Focal_length wikiPageWikiLinkText "focal-length".
- Focal_length wikiPageWikiLinkText "focus".
- Focal_length wikiPageWikiLinkText "lens focal length".
- Focal_length wikiPageWikiLinkText "out of focus".
- Focal_length align "center".
- Focal_length caption "210".
- Focal_length caption "28".
- Focal_length caption "50".
- Focal_length caption "70".
- Focal_length footer "An example of how lens choice affects angle of view. The photos above were taken by a 35 mm camera at a fixed distance from the subject.".
- Focal_length footerAlign "center".
- Focal_length hasPhotoCollection Focal_length.
- Focal_length image "Angleofview 210mm f4.jpg".
- Focal_length image "Angleofview 28mm f4.jpg".
- Focal_length image "Angleofview 50mm f4.jpg".
- Focal_length image "Angleofview 70mm f4.jpg".
- Focal_length width "150".
- Focal_length wikiPageUsesTemplate Template:Commons_category.
- Focal_length wikiPageUsesTemplate Template:Multiple_image.
- Focal_length wikiPageUsesTemplate Template:Photography_subject.
- Focal_length wikiPageUsesTemplate Template:Redirect.
- Focal_length wikiPageUsesTemplate Template:Reflist.
- Focal_length subject Category:Geometrical_optics.