User manual ORION TELESCOPES & BINOCULARS 09005
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Manual abstract: user guide ORION TELESCOPES & BINOCULARS 09005
Detailed instructions for use are in the User's Guide.
[. . . ] INSTRUCTION MANUAL
Orion AstroView 120ST EQ
® TM
#9005 Equatorial Refracting Telescope
Customer Support (800) 676-1343 E-mail: support@telescope. com
Corporate Offices (831) 763-7000
Providing Exceptional Consumer Optical Products Since 1975
P. O. A 0101
Tube rings Objective lens cell Dew cap/lens shade
Declination lock lever Large counterweight Small counterweight
Finder scope Finder bracket
Focus knob Eyepiece Star diagonal Right Ascension slow-motion control Declination slow-motion control Right Ascension lock lever Polar axis finder scope Latitude adjustment T-bolts
Counterweight lock knobs Counterweight shaft "Toe saver"
Tripod leg
Accessory tray attachment point Accessory tray bracket Accessory tray
Leg lock knob
Figure 1. The AstroView 120ST EQ Refractor 2
Congratulations on your purchase of a quality Orion telescope!Your new AstroView 120ST EQ Refractor is designed for high-resolution viewing of astronomical objects. [. . . ] Identify a bright star near the celestial equator and look up its coordinates in a star atlas.
2. lock levers on the equatorial mount, so the telescope optical tube can move freely. setting circles for finding objects; the thumbscrew is only needed for polar alignment using the polar axis finder scope. Finding Objects With the Setting Circles Now that both setting circles are calibrated, look up in a star atlas the coordinates of an object you wish to view. setting circle pointer passes the 0° indicator, the value on the Dec. Most setting circles are not accurate enough to put an object dead-center in your finder scope's field of view, but they'll get you close, assuming the equatorial mount is accurately polaraligned. setting circle should be recalibrated every time you wish to locate a new object. Do so by calibrating the setting circle for the centered object before moving on to the next one. Beginners occasionally experience some confusion about how to point the telescope overhead or in other directions. In Figure 1 the telescope is pointed north as it would be during polar alignment. But it will not look like that when the telescope is pointed in other directions. Let's say you want to view an object that is directly overhead, at the zenith. One thing you DO NOT do is make any adjustment to the latitude adjustment T-bolts. Remember, once the mount is polar aligned, the telescope should be moved only on the R. A. axis until the counterweight shaft is horizontal (parallel to the ground). lock lever and rotate the telescope until it is pointing straight overhead. What if you need to aim the telescope directly north, but at an object that is nearer to the horizon than Polaris?You can't do it with the counterweight down as pictured in Figure 1. so it points to where you want it near the horizon.
10
a.
b.
c.
d.
Figure 9. This illustration shows the telescope pointed in the four cardinal directions: (a) north, (b) south, (c) east, (d) west. Note that the
tripod and mount have not been moved; only the telescope tube has been moved on the R. A. axes.
To point the telescope directly south, the counterweight shaft should again be horizontal. [. . . ] Your AstroView 120ST telescope requires very little mechanical maintenance. The optical tube is aluminum and has a smooth painted finish that is fairly scratch-resistant. Smudges on the tube can be wiped off with a soft cloth and a household cleaner such as Windex or Formula 409. Cleaning the Optics A small amount of dust or a few specks on the glass objective (main) lens will not affect the performance of the telescope. [. . . ]
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