Assessments - 2, GPA: 4 ( )

Fabricante : Celestron Arquivo Tamanho: 1.02 mb Arquivo Nome : Língua de Ensino:

Tighten the thumb screw on the end of the cable down completely. This method helps ensure there’s no slippage when using the cable. Please note that the orientation of the declination cable can be adjusted to the position that suits you best. 3. Locate the right ascension cable holder (27) and the right ascension cable (31) and assemble the cable to the holder in the same manner described for the declination cable. Attaching the Counterweight 1. Slide the counterweight shaft (29) through the counterweight (30). 2. Use the nut on the counterweight lock to secure the counterweight in place. 3. Thread the counterweight shaft clockwise into the equatorial mount (33) as shown in Figure 1. Installing the Telescope Optical Tube on the Equatorial Mount (60mm Models) 1. Remove the two wing nuts and two washers from the telescope optical tube (12). 2. Put the screws through the holes in the mounting plate of the equatorial mount. 3. Tighten the wing nuts on the screws. Installing the Telescope Optical Tube on the Equatorial Mount (70mm Models) The optical tube is held to the mount with two mounting rings. On the bottom of the mounting rings are square extrusions — one on each ring. This portion of the ring slides over part of the mounting platform to hold the telescope in place. 1. Slightly loosen the screws (on the bottom) that hold the tube rings on the mount. (If the tube rings are not attached to the mount, you will have to screw them on from the bottom). 2. Place the telescope tube on the mount and orient it so that the objective lens is opposite the slow motion control handles. 3. Open the rings slightly to fit around the tube and then pull down. 4. Tighten the thumb bolts on the rings to hold the telescope to the mount. 5. Tighten the screws that hold the tube rings to the mount (on the bottom). 6 Attaching the Finderscope 1. Remove the screws (21) from the optical tube where the fmderscope will be mounted. 2. Place the fmderscope bracket (5) over these holes in the optical tube and attach it using the screws you just removed from the optical tube. Orient the bracket as shown in Figure 1. 3. Place the fmderscope into the bracket and secure it in place using the adjustment screws (4). Installing Eyepieces NOTE: The Firstscope 60 EQ telescopes come equipped for use with either .96" or 1 Vi" eyepieces. The eyepiece adapter comes set up for use with a .96" size eyepieces. The inner bushing of the adapter is easily removed so that 1 Vi" eyepieces can be used (see diagrams below). The Firstscope 70 models use only 1 Vi" eyepiece. 1. Remove the caps from the focuser (at the end of the telescope tube) and the diagonal. The cap for the diagonal is at the center of the top cover. Do not remove the entire outer bushing adapter of the diagonal if installing a .96" eyepiece, as you’ll need this for proper installation of the eyepiece. 2. Insert the chrome end of the diagonal into the focuser. 3. Lock into place by tightening the set screws on the focuser. 4. Remove caps from the eyepiece (ocular) and place it into the diagonal. Lock it into place with the set screw. 1 Vi Eyepiece .96" Eyepiece Installing the Barlow Lens - .96" To install a Barlow Lens (for those models including it). First, you can remove the diagonal from the focuser and insert the Barlow lens directly into the end of the focuser, then put the diagonal in the Barlowlens and the eyepieces into the diagonal. TELESCOPE OPERATION — GETTING SET UP Setting Latitude Loosen the polar axis knob (16) with one hand, while holding the equatorial mount with the other hand. Look at the latitude scale (17) on the side of the mount, then set the mount at the latitude of your location. If you don’t know your latitude, it can be found on a road atlas of your area. Once the latitude is set, tighten the polar axis knob. This only has to be done once for any given latitude, and then readjusted if the telescope is used at a different latitude. Adjusting and Balancing Declination and Right Ascension To move the telescope in declination (north/south) there are two options. For large and quick movements, release the declination knob (22), move the telescope in the direction of the object you want to view, then tighten the knob when you’re near the object. For very small movements and fine adjustments, use the declination cable (18). The declination cable has a range of about 30°. If you get to the end of this range but haven’t yet reached the object you’re trying to view, you’ll want to loosen the declination lock for greater movement. Manually move the telescope tube past the object you want to view, then use the slow motion control, in the opposite direction, to go back to the object. Tighten the knob and reverse the direction of the declination cable. Do not try to force movement when the declination cable has reached the end of its range. There are the same two options for moving the telescope in right ascension (east/west). For large and q...

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