a Spektiv (English. Scope) is a usually monokulares telescope designed for the earth observation on the day. Contrary to the astronomical telescope it produces an upright, sidecorrect picture for Kepler design.
Table of contents
for this purpose is a Spektiv ideal-proves compactly with short focal length, relatively easily and durably (impact-protected, waterproof) built, in order to be able to be used also transported in wind and weather with stand and.
For comfortable observing most models with a 45°-Schrägeinblick are available. However also Spektive with Geradeinblick are manufactured.
Objective - diameters (aperture) are 65, 77, 80, 85 and 100 millimeters with enlargements of 20 -, frequently which can be found, 80fach with change or zoom shot eyepieces. When very high enlargements expensive special glasses are necessary, in order to avoid color fringings, in addition, these cannot prevent indistinct ones by atmospheric turbidity and summer heat flares.
As is the case for astronomical telescopes can different eyepieces are also installed, in order to adapt depending upon targeted application the enlargement and the visual field. Here can be differentiated between fixed focal length and zoom shot eyepieces. First have one focal length (normally for instance 30x enlargement) and often as special wide angle eyepieces are firmly manufactured. Zoom shot eyepieces have usually a swivelling ring, over which the enlargement (zoom shot) can be varied.
The predominant number of Spektive are from the structure Linsenfernrohre (Refraktoren), rare Spiegelteleskope (reflectors, e.g. after Maksutov). As the newer development video or photo cameras (“Digiscoping”) can be attached and relieved directly to the Spektivokular the observer of arduous long-term observations.
the characteristics mentioned make interesting a Spektiv also as „travel telescope “for amateur astronomers, because the imaging capacities are equal one „genuine “telescope. In addition astroeyepieces are connectable with some Spektiven by eyepiece adapter particularly high-increasing 1 1/4.