• C80-HD Refractor Telescope • C102-HD Refractor Telescope • C114-HD Reflector Telescope • C150-HD Reflector Telescope • CG-4 Equatorial Mount Models #21077 / #21016 / #31027 / #31056 / #91510 INSTRUCTION MANUAL 1
IDENTIFYING PARTS OF FIGURE 1 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Star Diagonal (Refractors only) Eyepiece Finderscope Finder Bracket Focuser Tube Rings Objective Cap Optical Tube Platform DEC Setting Circle R.A. Clamp R.A. Setting Circle Polar Finder (Optional) 13. Latitude Scale 14. Altitude Adjustment Screw 15. Tripod Mounting Head 16. Tripod 17. Tripod Support Brace 18. Counterweight Shaft 19. Counterweight(s) 20. Azimuth Adjustment Screw 21. R.A. Slow Motion Knob 22. DEC Clamp 23.
C114-HD & C150-HD 8. 23. 22. 9. 21. 10. 18. 11. 20. 12. 13. 19. . 14. 15 25. 16. 17. 24.
INTRODUCTION Congratulations on your purchase and welcome to the Celestron world of astronomy. If you’re a newcomer to the hobby of astronomy, some of the terms and telescope components described in this instruction manual may be new to you. This manual is designed to instruct you in the proper use of your Celestron C80HD Refractor, C102-HD Refractor, C114-HD 4.5 Newtonian or C150-HD Newtonian as well as the CG-4 Equatorial Mount.
azimuth adjustment bolts. It may be necessary to partially unscrew the bolts to allow the metal peg to fully extend into the altazimuth housing. 4. Tighten the knob located on the underside of the tripod head. This will hold the equatorial mount firmly to the tripod head. Attaching the Accessory Tray Next, attach the accessory tray to the tripod. Locate the accessory tray and the three wingnut screws to attach the tray. 1.
Before you attach the optical tube, make sure that the declination and right ascension clamps are tight. The optical tube attaches to the mount via two rings that are mounted on the tube of the telescope. To mount the telescope tube: 1. Loosen the knobs on the side of the rings. This will allow you to slide the mounting rings the length of the optical tube. 2. Locate the two screws on either end of the platform for the optical tube (#8). 3.
2. Lock the R.A. clamp to hold the telescope in place. 3. Release the DEC clamp and position the telescope so that it is parallel to the ground. 4. GRADUALLY release the telescope tube to see which way it “rolls.” 5. Loosen the screws that hold the telescope inside the mounting rings and slide the telescope either forward or backwards until it remains stationary when the DEC clamp is released (see figure 2b). 6. Tighten the screws that hold the telescope in the mounting rings.
2. Mount the finderscope bracket (#4) by mounting the bracket over the studs protruding from the tube and tightening it down with the supplied nuts. 3. Slide the rubber O-ring over the eyepiece end of the finderscope and roll it 2/3 of the way up the finderscope. 4. Insert the eyepiece end of the finderscope through the bracket until the O-ring presses tightly between the finder and the inside of the bracket. 5. Tighten the three adjustment screws until they make contact with the finderscope body.
Image orientation through the finder will be inverted (i.e., upside down and backwards left-to-right). This is normal for any finderscope that is used straight-through. Because of this, it may take a few minutes to familiarize yourself with the directional change each screw makes on the finderscope. Telescope Basics Calculating Magnification The magnification (or power) of a telescope is variable depending upon the focal length of the eyepiece being used along with the focal length of the telescope.
The celestial meridians of longitude are called "coordinates of right ascension (R.A.)", and like the Earth's longitude meridians they extend from pole to pole. There are 24 major RA. coordinates, evenly spaced around the 360º equator, one every 15º. Like the Earth's longitudes, R.A. coordinates are a measure of time as well as angular distance. We speak of the Earth's major longitude meridians as being separated by one hour of time because the Earth rotates once every 24 hours (one hour = 15°).
Dipper will change during the year and throughout the course of the night. When the Big Dipper is low in the sky (i.e., near the horizon) it may be difficult to locate. Figure 6 Figure 7 To make finding and tracking the stars easier, a rough polar alignment is required. 1. The right ascension (polar) axis should be pointed towards the North Pole (see figure 7). 2. The equatorial mount should be level. 3.
5. Using the altitude and azimuth adjustment screws (#14 & #20), move the mount until Polaris is in the field of view of the finderscope. Rough adjustments in azimuth can be made by moving the tripod. 6. Center Polaris using the altitude and azimuth controls. Remember, do not move the telescope in R.A. and DEC. You want to adjust the direction the polar axis is pointing and you are using the telescope to see where the polar axis is pointing. This gets you close to the pole but not directly on it.
6. Hold the telescope and release the R.A. clamp. 7. Move the telescope in R.A. until the indicator points to the correct coordinate. 8. Lock the R.A. clamp to prevent the telescope from slipping in R.A. The telescope will track in R.A. as long as the motor drive is operating. 9. Look through the finderscope to see if you have located the object. 10. Center the object in the finder. 11. Look in the main optics and the object should be there.
4. Move the telescope in R.A. using the slow motion control handle until the three on the vernier scale lines up with one of the marks on the R.A. setting circle. Remember, the R.A. indicator must stay between the 18h 50m mark and the 19h 00m mark on the R.A. setting circle! 5. Look through the telescope and the Ring Nebula should be within the field of view if you are using a low power eyepiece (assuming you have already set the DEC).
The best way to re-collimate is with a good collimation tool. Celestron offers a Newtonian Collimation Tool (#94183) with detailed instructions that make it an easy chore. Technical Specifications C80-HD (#21077) Optical System: 80mm 900mm f/11 45x 189x 1.45 131 12 1.1° 57’ 35" C102-HD (#21016) Achromat Refractor Fully MultiCoated 102mm 1000mm f/10 50x 241x 1.14 212 12.5 1° 53’ 38.5" 6 lbs. 23 lbs. 8.0 lbs. 28 lbs.
Motor Drive (#93517) - This single-axis unit runs off D-cell batteries. It compensates for the Earth's rotation keeping celestial objects centered in the field of view. This makes observing much more enjoyable as it eliminates the constant usage of the slow motion controls. A dual-axis model (#93522) is also available. Eyepieces - A whole assortment of various sizes of 1 - 1/4" eyepieces are available to give you a wide range of magnifications.
CELESTRON TWO YEAR WARRANTY A. Celestron warrants this telescope to be free from defects in materials and workmanship for two years. Celestron will repair or replace such product or part thereof which, upon inspection by Celestron, is found to be defective in materials or workmanship. As a condition to the obligation of Celestron to repair or replace such product, the product must be returned to Celestron together with proof-of-purchase satisfactory to Celestron. B.
