Do not let children use telescope at daylight without an adult control. The telescope TAL-65 (hereinafter referred to as the telescope) is designed for visual observations of celestial objects. The telescope can be used for individual observations by ama- teur astronomers, in the schools, in the astronomic societies.
TeChNICal SPeCIfICaTIONS 65 mm Aperture Focal length 500 mm Telescope magnification and angular field With eyepiece f’ = 5mm °5' х With eyepiece and Barlow lens 0°5' х With eyepiece, Barlow lens and plug 0°5' х Resolving power .'' Limiting visual magnitude Right ascension turning angle 360°...
CONSTruCTION Of The TeleSCOPe The telescope consists of optical tube assembly (OTA) (), German equatorial mount (), a tripod (3). The optical tube is a basic component of the telescope. It includes all main optical units such as a primary mirror, a diagonal mirror and a focuser.
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The minimum 30 magnification is obtained when the eyepiece is set into a focuser. Having established first the Barlow lens and than the eyepiece, the 90 magnification is obtained. Having established the plug into the Barlow lens, then the eyepiece, the maximum 30 magnification is obtained.
PreParING TeleSCOPe fOr ObServaTIONS Take a telescope out of the package. Release the clamp knob (); lay the OTA in the rings at about the midpoint of the tube’s length with and fix it with the knob. Release the handle on the latitude ...
balaNCING The DeClINaTION axIS Place the Dec. axis in the horizon- tal position. Release the handle, that fixes the Dec. axis. Slide the OTA forward or back in the tube rings until balanced. Fix the Dec. axis. ...
ObServaTIONS The equatorial mount is designed for pointing the telescope at the celestial objects and tracking their movement. The equatorial mount consists of the polar axis (5) and the axis of declination (3). All operations of pointing OTA at ...
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Maximum magnifications help observing some details on the Luna and planets, some double stars and the elements of star accumulations. Telescope’s mirror is very sensitive to abrupt temperature changes, this is why let the mirror acclimatize first while observing outside in winter season.
COllIMaTION (alIGNMeNT) Of The OPTICS As any other the primary mirror of a telescope needs collimation (alignment) from time to time*. This simple operation can be performed by everyone. Remove the Barlow lens and the eyepiece out of the focuser drawtube and check the reflection of primary mirror in the secondary one.
MaINTeNaNCe In order to keep telescope in good operating condition one should provide good care and maintenance for the instrument. Improper cleaning of the aluminized mirrors can scratch their coatings, so one should use blower bulb or special brush to remove dust from the surfaces.
STOraGe The telescope must be kept in a clean, dry (humidity must not exceed 80%), dust-free place with an ambient temperature between +5° and +40°C. Avoid collision and shaking of the telescope. It is prohibited to store acids, alkalis, and any chemically active ...
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