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With any telescope, microscope or lens, a maximum magnification exists beyond which the image looks bigger but shows no more detail. It occurs when the finest detail the instrument can resolve is magnified to match the finest detail the eye can see. Magnification beyond this maximum is sometimes called "empty magnification".
The best known instrument of this group is the Basque alboka with double sound tubes that have a common wind cap and a common horn bell. All parts of the instrument are attached to a semicircular wooden arch (see Alboka ). In Gascony , on the northwestern edge of the Pyrenees, the caramera ( caremère ) is played.
Galilean type Soviet-made miniature 2.5 × 17.5 monocular Diagram of a monocular using a Schmidt-Pechan prism: 1 – Objective lens 2 – Schmidt-Pechan prism 3 – Eyepiece. A monocular is a compact refracting telescope used to magnify images of distant objects, typically using an optical prism to ensure an erect image, instead of using relay lenses like most telescopic sights.
Laúd (Spanish: "lute") is a plectrum-plucked chordophone from Spain, played also in diaspora countries such as Cuba and the Philippines. The laúd belongs to the cittern family of instruments. The Spanish and Cuban instruments have six double courses in unison (i.e. twelve strings in pairs); the Philippine instrument has 14 strings with some ...
Musical instruments like laúd and bandurria are also used. (Portuguese tunas usually play instruments like mandolin instead of bandurria and laúd). The other important instrument which characterized the student music was the tambourine. Besides these basic instruments, the use of others instruments gives the tuno's music a very special richness.
In another innovative form, the magnifying glass can manifest as a sheet magnifier, employing numerous slender, concentric, ring-shaped lenses. These are collectively known as a Fresnel lens , which, despite being significantly thinner, operates effectively as a single lens.
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The dulzaina (Spanish: [dulˈθajna]) or dolçaina (Catalan pronunciation: / [dulˈsajnə]) is a Spanish double reed instrument in the oboe family. It has a conical shape and is the equivalent of the Breton bombarde. It is often replaced by an oboe or a double reeded clarinet as seen in Armenian and Ukrainian folk music.