Celestron 21077 - Manuals

Celestron 21077 – Manual in PDF format online.

Manuals:

Manual

Manual Celestron 21077

Summary

Page 2 - IDENTIFYING PARTS OF FIGURE 1; Figure 1A

2 IDENTIFYING PARTS OF FIGURE 1 1. Star Diagonal (Refractors only) 13. Latitude Scale 2. Eyepiece 14. Altitude Adjustment Screw 3. Finderscope 15. Tripod Mounting Head 4. Finder Bracket 16. Tripod 5. Focuser 17. Tripod Support Brace 6. Tube Rings 18. Counterweight Shaft 7. Objective Cap 19. Counterw...

Page 3 - Figure 1C

3 C114-HD & C150-HD Figure 1C CG-4 EQ Mount . 8. 9. 10. 11. 12. 13. 14. 15 16. 17. 18. 19. 21. 20. 22. 23. 24. 25.

Page 4 - INTRODUCTION; Celestron; TELESCOPE ASSEMBLY

4 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 us...

Page 5 - firmly to the tripod head.; Attaching the Accessory Tray; those on the support brace.; Installing the Counterweight Bar; Remove the safety thumbscrew on the end of the counterweight bar.; Attaching the Optical Tube

5 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 T...

Page 6 - Balancing the Telescope; GRADUALLY; release the telescope to see which way it “rolls.”

6 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 yo...

Page 7 - release the telescope tube to see which way it “rolls.”

7 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...

Page 8 - Attaching the Accessories; Loosen the thumb screw on the eyepiece holder located on the; Aligning the Finderscope; Tighten the lock nuts to secure the position of the finderscope.

8 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 ...

Page 9 - Telescope Basics; Calculating Magnification; To calculate the magnification we use the following formula:; Magnification

9 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 finderscop...

Page 11 - Figure 6; Figure 7; The equatorial mount should be level.

11 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 (po...

Page 14 - 8h 50m mark and the 19h 00m mark on the R.A. setting circle!; Telescope Maintenance; compressed air and then a camel's hair brush to remove the dust.

14 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 t...

Page 15 - Technical Specifications; and subject to change without notice.; OPTIONAL ACCESSORIES

15 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) C102-HD (#21016) C114-HD (#31027) C150-HD (#31056) Optical System: Achromat Refracto...

Page 17 - CELESTRON TWO YEAR WARRANTY

17 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 condit...