Celestron Cometron 114AZ AstroMaster Manual (70AZ, 90AZ, 114AZ)
Celestron Cometron 114AZ Manual
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- Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 1
AstroMaster Series Telescopes INSTRUCTION MANUAL ● AstroMaster 70AZ # 21061 ●AstroMaster 90AZ # 21063 ● AstroMaster 114AZ # 31043 - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 2
...3 ASSEMBLY ...6 Setting up the Tripod ...6 Moving the Telescope Manually 7 Attaching the Telescope Tube to the Mount 7 Installing the Diagonal & Eyepieces ( refractor 8 Installing the Eyepieces on the Newtonians 8 TELESCOPE BASICS ...9 Image Orientation ...10 Focusing...10 Aligning the - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 3
filter). Permanent and irreversible eye damage may result. • Never use your telescope to project an image of the sun onto any surface. Internal heat build-up can damage the telescope and any accessories attached to it. • Never use an eyepiece solar filter or a Herschel wedge. Internal heat build - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 4
8 9 Figure 1-1 AstroMaster 90AZ Refractor (AstroMaster 70AZ refractor similar) 1. Objective Lens 2. Telescope Optical Tube 3. Star Pointer Finderscope 4. Eyepiece 5. Diagonal 6. Focus Knob 7. Pan Handle 8. Accessory Tray 9. Tripod 10. Azimuth Lock 11. Alt-Az Mount 12. Dovetail Mounting Bracket 4 - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 5
1 12 11 10 9 3 2 4 5 7 6 8 Figure 1-2 AstroMaster 114 AZ Newtonian 1. Star Pointer Finderscope 2. Eyepiece 3. Tube Ring 4. Telescope Optical Tube 5. Primary Mirror 6. Pan Handle 7. Azimuth Lock 8. Accessory Tray 9. Tripod 10. Alt-Az Mount 11. Dovetail Mounting Bracket 12. Focus Knob 5 - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 6
section covers the assembly instructions for your AstroMaster telescope. Your telescope should be set up (erect image for 114AZ), erect image diagonal 1.25" (for 70AZ and 90 AZ), "The Sky" Level 1 CD-ROM. Setting up the Tripod 1. Remove the tripod from the box (Figure 2-1). The tripod comes - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 7
Moving the Telescope Manually The AstroMaster Alt-Az mount is easy to move wherever does not move suddenly while attaching the telescope optical tube. Also, remove the objective lens cap (refractor) or the front opening cap (Newtonian). To mount the telescope tube: 1 Remove the protective paper - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 8
step 2 above. Figure 2-13 Installing the Eyepieces on the Newtonians The eyepiece (or ocular) is an optical element that magnifies the image focused by the telescope. Without the eyepiece it would be impossible to use the telescope visually. Eyepieces are commonly referred to by focal length and - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 9
nature of the optical design determines how the light is focused. Some telescopes, known as refractors, use lenses, .and other telescopes, known as reflectors (Newtonians), use mirrors. Developed in the early 1600s, the refractor is the oldest telescope design. It derives its name from the method it - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 10
and reversed from left-to-right (i.e., inverted). However, when using the AstroMaster refractor and the standard erect image diagonal, the images is correctly oriented in every aspect. Newtonian reflectors produce a right-side-up image but the image will appear rotated based on the location of the - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 11
Multiplying 2.8 by 60 gives a maximum useful magnification of 168 power. Although this is the maximum useful magnification, most observing is done in the range of 20 to 35 power for every inch of aperture which is 56 to 98 times for the AstroMaster 70AZ telescope. You can determine the magnification - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 12
things to remember to ensure you get the best possible image. • Never look through window glass. Glass found in lenses (specifically glasses), you may want to remove them when observing with an eyepiece attached to the telescope. When using a camera, however, you should always wear corrective lenses - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 13
For telescopes with equatorial mounts, the users have setting circles and polar alignment methods to help them find objects in the sky. With your altazimuth mount, you can use a method called "star hopping" which is described in the "Celestial Observing Section" later in this manual - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 14
out the starlight. However, part of this circular motion of stars in this region of the sky can be seen by setting up a camera on a tripod and opening the shutter for a couple hours. The timed exposure will reveal semicircles that revolve around the pole. (This description of stellar motions also - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 15
contrast and bring out detail on the planetary surface, try using Celestron eyepiece filters. Observing the Sun Although overlooked by many observing our star so as not to damage your eyes or your telescope. For safe solar viewing, use a solar filter that reduces the intensity of the Sun's light, - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 16
is by star hopping. Star hopping is done by using bright stars to "guide" you to an object. For successful star hopping, it is helpful to know the field of view of you telescope. If you're using the standard 20mm eyepiece with the AstroMaster telescope, your field of view is approximately 1º. If you - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 17
, while remaining on a line connecting the two stars. 6. Look through the telescope and the Ring Nebula should be in your field of view. The Ring Nebula takes about 20 minutes to fully adapt to the darkness. So always use a red-filtered flashlight to preserve your dark-adapted night vision). These - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 18
you get the most out of your telescope. Transparency Transparency is the clarity of the pollution greatly affect transparency. While not a problem for the brighter stars and planets, bright slightly displaced creating an imperfect or smeared image. These atmospheric disturbances vary from time-to - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 19
can be obtained from your camera instruction manual which can supplement what you can find in detailed books on the subject matter. • Do your photography from a dark sky observing site if possible. Piggyback Photography Only for the 114EQ Newtonian telescope, piggyback photography is done with - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 20
the telescope at the ground until the dew has evaporated. If moisture condenses on the inside of the optics, remove the accessories from the telescope. Place the telescope in your telescope using the optional Newtonian Collimation Tool (#94183) offered by Celestron. To collimate the telescope without - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 21
telescope tube is on its mount and pointing at a bright star. The telescope should be set up at night and a star's image should be studied at medium to high power (30-60 power per inch get the centering you desire. It is best to use the optional collimation tool or collimating eyepiece. Look into - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 22
mm, such as a 6mm or 4mm. Another option is to use a longer focal length ocular with a Barlow lens. When a have two people working together: one viewing and instructing which screws to turn and by how much, telescope tube to re-center the star again in the center of the field of view. The star image - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 23
the usefulness of your telescope. This is just a short listing of various accessories with a brief description. Visit the Celestron website or the Celestron Accessory Catalog for complete descriptions and all accessories available. Sky Maps (# 93722) - Celestron Sky Maps are the ideal teaching guide - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 24
-coated Star Pointer Erect Image 20mm (50x) Newtonian 114mm (4.5") 1000mm f/9 31% - 10% Fully coated Star Pointer n/a 20mm Erect Image (50x) -- 10mm Tripod Leg Diameter 1.25" CD-ROM "The Sky" Level 1 Altazimuth yes yes yes yes Altazimuth yes yes yes yes Altazimuth yes yes yes yes Highest Useful - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 25
Celestron 2835 Columbia Street Torrance, CA 90503 U.S.A. Tel. (310) 328-9560 Fax. (310) 212-5835 Website www.celestron.com Copyright 2007 Celestron All rights reserved. (Products or instructions may change without notice or obligation.) Item # 21061-INST Printed in China $10.00 06-07 - Celestron Cometron 114AZ | AstroMaster Manual (70AZ, 90AZ, 114AZ) - Page 26
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INSTRUCTION MANUAL
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AstroMaster 70AZ # 21061
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AstroMaster 90AZ # 21063
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AstroMaster 114AZ # 31043