Celestron 80 manuale d’uso

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IDENTIFYING P ARTS OF YOUR FIRSTSCOPE PowerSeeker 80EQ 1. Objective Lens 10 Right Ascension (R.A.) Sett ing Circle 2. Declination Sett ing Circle 11 Slow Motion Cont rols 3. Equatorial Mount 12. Focus Knob 4. Counterweight Bar 13. Star Diagonal 5. Counterweight 14. Eyepiece 6. Accessory Tray 15. 5x24 Finderscope 7. Tripod Leg 16. Tube Ring 8. Tripo[...]

A A s s s s e e m m b b l l i i n n g g Y Y o o u u r r T T e e l l e e s s c c o o p p e e 1) Your Celestron tel escope should include all of t he following: a. Tripod with center support bracket b. Telescope tube with tube rings at tached c. Equatorial mount head d. Two 1 ¼" eyepieces e. 90 ˚ star diagonal f. 5x24 Finderscope g. 3x Barlow [...]

11) Locate the finderscope. Rem ove the knurled nuts on the threaded posts at the focuser end of the telescope tube. Mount the finderscope bracket by placing the bracket over the post s protruding from t he tube and tightening it down with the knurled nuts. Orie nt the finderscope so that the large lens is facing t owards the front of the tube. See[...]

you want. For very sm all movem ents and fine adjustm ents, turn the right ascensi on cable. Unlike the declinati on cable, the right ascension cable has 360 ˚ of continuous m otion. Balancing the Telescope in Right Ascension (R.A.): The telescope should be properly balanced in order for it to m ove sm oothly in both axes. Proper balance i s essen[...]

. Inverted image, as viewed with the eyepiece directly in telescop e Actual image as seen with the unaided eye Fi g ure 7 Focusing To focus your telescope, simply turn th e focus knob located directly below the eyep iece holder. Turning the knob clockwise allows you to focus on an object that i s farther than the one you are currently observing. Tu[...]

Motion of the Stars The daily motion of the Sun across the sky is familiar to even the most casual observer. This daily trek is not the Sun moving as early astronomers thought, but the result of the Earth' s rotation. The Earth' s rotation also causes the st ars to do the same, scribing out a large circle as the Eart h completes one rotat[...]

If you are observing from Los Angel es, which has a latitude of 34°, t hen the celestial pole i s 34° above the northern horizon. All a latitude scale does then is to point the polar axis of the tel escope at the right elevati on above the northern (or southe rn) horizon. To align your te lescope: 1. Make sure the polar axis of the mount is point[...]

Finding the North Celestial Pole In each hemisphere, there is a point in the sky around which all the other stars appear to rotate. These points are called the celestial poles and are named for the hemisphere in which they reside. For ex ample, in the northern hemisphere all stars move around the north celestial pole. When the telescope's pola[...]

2. The declination setting circle is factory set and s hould not need any adjustm e nt if it reads accurately. 3. The right ascension setting circle (#10) must be al igned. Choose a bright and easy to fi nd star in a star chart and note the coordinates (right ascension and decl ination). Find the star in the finderscope and then in the telescope. N[...]

Apparent Field of Eyepiece True Field =  Magnification As you can see, before determi ning the field of view, you must calculate the magnification. Using the example in the previous section, we can determine the field of view using the sam e 20mm eyepi ece. The 20mm eyepiece has an apparent field of view of 45[...]

CELESTIAL OBSER VING Now that your telescope is set u p, you’re ready to use it fo r observing. This sect ion covers visual observing for both sol ar system and deep-sky object s. Observing the Moon In the night sky, the moon is a prime target for your first l ook because it is extremely bright and easy to find. Although the beauty of the full mo[...]

Observing Deep-Sky Objects Deep-sky objects are simpl y those objects outside the boundaries of our sola r system. They i nclude star clusters, planetary nebulae, diffuse nebulae, double stars and other gal axies outside our own Milky Way. Unli ke the sun, moon and our five major planets, m ost deep-sky objects are not vi sible to the naked eye. Fi[...]

condition and five the best. Seeing condi tions can be classifi ed in one of t hree categories. The definit ions of these categories are based on the causes of the different seeing condi tions. Type 1 seeing conditions are characterized by rapid changes in the im age seen through the telescope. Exte nded objects, like the moon, appear to shim mer w[...]

S S P P E E C C I I F F I I C C A A T T I I O O N N S S #21048 Optical System: Refractor Aperture: 80mm (3.1") Focal Length: 900mm F/ratio: f/11 Focuser Rack and Pinion Standard Oculars (or Eyepieces) 20mm 1¼" (45x) 4mm 1¼" (225x) 3x Barlow (135-675x) Resolution 1.7 arc seconds Light gathering Power 131x unaided eye Limit ing Magni[...]

Filters Sets, Eyepiece - Celestron offers four convenient filter sets, which contain four different filte rs per set. Not only are these highly useful filter combinations, but they also offer an economical way to a dd versatility to your filter collection. Series 1 – #94119-10 Orange, Light Blue, ND13%T, Polari zing (#s 21, 80A, #15, Polarizing) [...]

CELESTRON TWO YEAR W ARRANTY A. Celestron warrants this telescope to be free from defects in m aterials and workm a nship for two years. Celestron will repa ir or replace such product or part thereo f which, upon inspection by Cele stron, is found to be defectiv e in m aterials or workmanship . As a condition to the obligation of Celest ron to repa[...]

Celestron 2835 Columbia St reet Torrance, CA 90503 U.S.A. Tel. (310) 328-9560 Fax. (310) 212-5835 Web site at www.celestron.com Copyright 2005 Ce lestron All rights reserved. (Products or instructions m ay change without notice or obl igation.) Item # 21048-INST $10.00 01-05 Printed in China[...]