Assessments - 2, GPA: 4.5
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Equatorial mount DEF B. Counterweight shaft C. Counterweight D. Slow-motion control knobs (2) E. 9-mm eyepiece F. 25-mm eyepiece G. 3X Barlow lens H. Main optical unit I. Accessory tray J. Finder scope K. 45. prism L. Mounting plate M. Accessory tray screws (3) N. Tripod bolts (3) O. Tripod legs (3) A B C G H I J K L M N O WARNING! NEVER aim your telescope at the sun or even close to the sun! Instant and irreversible damage can occur, including blindness! Do not let children use any telescope without adult supervision. 2 Introduction Congratulations on your purchase of a precision-crafted NATIONAL GEOGRAPHIC™ telescope. With proper care and handling of your telescope, you will enjoy the pleasure of looking at nature’s wondrous sights through the eye of this instrument for many years. The NG90EQ has been designed to provide views of the moon’s craters, Jupiter’s major moons, and Saturn’s rings, in addition to dozens of galaxies, star clusters, and nebulae. As a terrestrial (land) telescope, the NG90EQ delivers great views of mountains, valleys, and many other features of the world around us. You can also use the NG90EQ to study animals and landscapes at a distance. To obtain the best performance from your telescope, please read this manual carefully and completely. ! WARNING! CHOKING HAZARD Small parts. Not suitable for children under 3 years. 3 ASSEMBLY 1) Carefully remove all parts from the cardboard cartons and lay them on a table or on the floor in order to take an inventory of all the pieces. Keep your box for storage or in case you ever need to ship your telescope. 2) Each aluminum tripod leg can extend to almost double its closed length. This enables the height of the telescope to be adjusted to comfortably suit most users. Each leg is equipped with a locking knob that can be loosened to perform this adjustment and then retightened. These locking knobs may already be attached to the tripod legs, or they may be packaged in a small plastic bag. If they are already attached you can extend the tripod legs to the desired height and then tighten these knobs. If they are separately packaged you will have to first insert them into the threaded holes located on the side of the black collar near the bottom of each closed tripod leg. 3) The tripod legs now need to be attached to the equatorial mount. The top of each leg is attached with a tripod bolt passed through the holes at the top of each leg. Position one of the three arms of the equatorial mount so that it fits between the leg sections. Insert a bolt through the first tripod section, then through the equatorial mount arm, and finally through the second leg section (See Fig. 1). You will note that one of the leg sections has a hexagonal (8-sided) hole. This is the side from which you insert the bolt. When the bolt comes out the other side, place a round washer and a then a wing nut over the bolt. Tighten the wing nut firmly. NOTE: Each tripodleg has a black metal flap about halfway down its length. This is a bracket to hold the accessory tray and must it be located on the inward-facing side of the tripod leg. (Fig. 1) 4) Attach the accessory tray to the tripod by inserting an accessory tray screw downward through each of the three small holes located near the edge of the accessory tray. Lift up the black metal accessory tray bracket on one tripod leg so that it is at a right angle to the leg. Push the accessory tray screw through the accessory tray and then through the slot in the accessory tray bracket. Place a washer then a wing nut over the screw and tighten the wing nut finger tight (See Fig. 2). Repeat this procedure for the other two accessory tray brackets (See Fig. 3). 4 (Fig. 2) (Fig. 3) 5) The main optical unit is attached to the equatorial mount with a black cast metal mounting plate. This mounting plate has four chromed screws mounted in it. Remove all four screws. The mounting plate has one smooth face and one face with small ridges. Place the smooth face against the underside of the main optical unit. Then insert the two slotted chromed screws through the inner holes so that they engage with the two threaded holes on the underside of the main optical unit. Tighten these with a screwdriver (See Fig. 4). (Fig. 4) 6) Position the main optical unit, with the mounting plate attached, over the equatorial mount as shown in Fig. 5. Insert the two chromed screws with the Phillips (+) heads into the two holes in the equatorial mount so that they engage the two holes at the ends of the mounting plate. Tighten with a screwdriver (See Fig. 6 and Fig. 7). (Fig. 5) (Fig. 6) (Fig. 7) 5 7) The counterweight balances your telescope and makes it easy to adjust and position. Hold the counterweight in your hand so you can see through the hole in the weight. Make sure that the black tightening knob on the counterweight is facing down. When you look through the counterweight, if you see that the hole is blocked by a metal rod, slowly turn the tightening knob counte...