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Table of Contents
Related Manuals for Celestron AstroMaster 114EQ
Summary of Contents for Celestron AstroMaster 114EQ
- Page 1 ● ● ● ● ● ●...
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Page 2: Table Of Contents
Attaching the Equatorial Mount....................7 Installing the Counterweight Bar & Counterweights..............7 Attaching the Slow Motion Cables ..................... 8 Attaching the Telescope Tube to the Mount................8 Installing the Diagonal & Eyepiece (refractor)................9 Installing the Eyepiece on the Newtonians................. 9 Moving the Telescope Manually .................... -
Page 3: Introduction
70mm refractor, 76mm Newtonian, and 114mm Newtonian. The AstroMaster Series is made of the highest quality materials to ensure stability and durability. All this adds up to a telescope that gives you a lifetime of pleasure with a minimal amount of maintenance. - Page 4 Figure 1-1 AstroMaster 70 EQ Refractor Telescope Optical Tube Latitude Adjustment Screw Dovetail Mounting Bracket Tripod Accessory Tray R.A. Setting Circle Tripod Star Pointer Finderscope Counterweight Bar Eyepiece Counterweights Focus Knob Equatorial Mount Dec. Slow Motion Cable Dec. Setting Circle R.A.
- Page 5 Figure 1-2 AstroMaster 114 EQ Newtonian (AstroMaster 76 EQ Newtonian Similar) Eyepiece Tripod Accessory Tray Tube Ring (not on 76 EQ) Tripod Telescope Optical Tube Counterweights Primary Mirror R.A. Setting Circle Dec. Slow Motion Cable Equatorial Mount R.A. Slow Motion Cable Dec.
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Page 6: Assembly
Next, we will install the tripod accessory tray (Figure 2-3) onto the tripod leg brace (center of Figure 2-2). Insert the cut-out in the center of the tray (flat side of the tray facing down) to match the center of the tripod leg brace and push down slightly (Figure 2-4). -
Page 7: Attaching The Equatorial Mount
The equatorial mount allows you to tilt the telescopes axis of rotation so that you can track the stars as they move across the sky. The AstroMaster mount is a German equatorial mount (CG-2) that attaches to the tripod head. To attach the mount: Remove the equatorial mount from the box (Figure 2-10). -
Page 8: Attaching The Slow Motion Cables
Slide the cable onto the R.A. shaft as far as it will go. There are two R.A. shafts, one on either side of the mount. It makes no difference which shaft you use since both work the same (unless you are using a motor drive). -
Page 9: Installing The Diagonal & Eyepiece (Refractor)
& & The diagonal is a prism that diverts the light at a right angle to the light path of the refractor. This allows you to observe in a position that is more comfortable than if you looked straight through. This diagonal is an erect image model that corrects the image to be right side up and oriented correctly left-to-right which is much easier to use for terrestrial observing. -
Page 10: Moving The Telescope Manually
Dec. lock knob is released. Tighten the tube ring screws firmly to hold the telescope in place on the 114 EQ. For the 76 EQ and the 70 EQ, tighten the mounting knob and then the safety screw on the dovetail mounting bracket. -
Page 11: Adjusting The Equatorial Mount
To do this you should loosen both latitude adjustment screws and manually push the front of the mount down as far as it will go. Then tighten the rear adjustment screw to raise the mount to the desired latitude. -
Page 12: Telescope Basics
A Newtonian reflector uses a single concave mirror as its primary. Light enters the tube traveling to the mirror at the back end. There light is bent forward in the tube to a single point, its focal point. Since putting your head in front of the telescope to look at the image with an eyepiece would keep the reflector from working, a flat mirror called a diagonal intercepts the light and points it out the side of the tube at right angles to the tube. -
Page 13: Image Orientation
If you have astigmatism, corrective lenses must be worn at all times. The Star Pointer is the quickest and easiest way to point your telescope exactly at a desired object in the sky. It's like having a laser pointer that you can shine directly onto the night sky. -
Page 14: Calculating Magnification
Although the power is variable, each instrument under average skies has a limit to the highest useful magnification. The general rule is that 60 power can be used for every inch of aperture. For example, the AstroMaster 70 EQ is 2.8”... -
Page 15: Determining Field Of View
Determining the field of view is important if you want to get an idea of the angular size of the object you are observing. To calculate the actual field of view, divide the apparent field of the eyepiece (supplied by the eyepiece manufacturer) by the magnification. -
Page 16: Astronomy Basics
The celestial sphere seen from the outside showing R.A. and DEC. The daily motion of the Sun across the sky is familiar to even the most casual observer. This daily trek is not the Sun moving as early astronomers thought, but the result of the Earth's rotation. The Earth's rotation also causes the stars to do the same, scribing out a large circle as the Earth completes one rotation. -
Page 17: Polar Alignment With Latitude Scale
Figure 4-3 The easiest way to polar align a telescope is with a latitude scale. Unlike other methods that require you to find the celestial pole by identifying certain stars near it, this method works off of a known constant to determine how high the polar axis should be pointed. -
Page 18: Pointing At Polaris
(technically called Ursa Minor) is not one of the brightest constellations in the sky, it may be difficult to locate from urban areas. If this is the case, use the two end stars in the bowl of the Big Dipper (the pointer stars). Draw an imaginary line through them toward the Little Dipper. -
Page 19: Polar Alignment In The Southern Hemisphere
Figure 4-6 Aligning the equatorial mount to the polar axis of the Earth Polar alignment to the South Celestial Pole (SCP) is a little more challenging due to the fact that there is no very bright star close to it like Polaris is in the NCP. There are various ways to polar align your telescope and for casual observing the methods below are adequate and will get you reasonably close to the SCP. -
Page 20: Pointing At Sigma Octantis
In each hemisphere, there is a point in the sky around which all the other stars appear to rotate. These points are called the celestial poles and are named for the hemisphere in which they reside. For example, in the southern hemisphere all stars move around the south celestial pole. -
Page 21: Aligning The Setting Circles
Look through the finderscope to see if you have located the object and center the object in the finderscope. 10. Look in the main optics and the object should be there. For some of the fainter objects, you may not be able to see them in the finderscope. -
Page 22: Motor Drive
(approximately 0° declination) and center it in a low power eyepiece. Now turn the drive on and let the telescope track for 1 or 2 minutes. If after a few minutes, the star drifts to the West, the motor is tracking too slowly and you should increase the motor speed. -
Page 23: Celestial Observing
To increase contrast and bring out detail on the planetary surface, try using Celestron eyepiece filters. Although overlooked by many amateur astronomers, solar observation is both rewarding and fun. However, because the Sun is so bright, special precautions must be taken when observing our star so as not to damage your eyes or your telescope. -
Page 24: Observing Deep-Sky Objects
Therefore, low-to-moderate power is all you need to see them. Visually, they are too faint to reveal any of the color seen in long exposure photographs. Instead, they appear black and white. And, because of their low surface brightness, they should be observed from a dark-sky location. Light pollution around large urban areas washes out most nebulae making them difficult, if not impossible, to observe. -
Page 25: Astrophotography
35mm SLR camera – you will need to remove your lens from the camera and attach a T-Ring for your specific camera brand. Then, you will need a T-Adapter (# 93625) to attach on one end to the T-Ring and the other end to the telescope focus tube. -
Page 26: Telescope Maintenance
Special care should be taken when cleaning any instrument so as not to damage the optics. If dust has built up on the optics, remove it with a brush (made of camel’s hair) or a can of pressurized air. Spray at an angle to the glass surface for approximately two to four seconds. -
Page 27: Aligning The Primary Mirror
To star collimate in the Northern Hemisphere, point at a stationary star like the North Star (Polaris). It can be found in the north sky, at a distance above the horizon equal to your latitude. It’s also the end star in the handle of the Little Dipper. - Page 28 Barlow lens. When a star is in focus it should look like a sharp pinpoint of light. If, when focusing on the star, it is irregular in shape or appears to have a flare of light at its edge, this means your mirrors aren’t in alignment.
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Page 29: Optional Accessories
Omni Barlow Lens (# 93326) – Used with any eyepiece, it doubles the magnification of that eyepiece. A Barlow lens is a negative lens that increases the focal length of a telescope. The 2x Omni is a 1.25” barrel, is under 3” (76mm) long, and weights only 4oz. (113gr.). -
Page 30: Astromaster Specifications
Resolution -- Dawes Limit " " 1.66 1.53 1.02 Light Gathering Power 100x 118x 265x Optical Tube Length 36" (91cm) 26" (66cm) 20" (51cm) Telescope Weight 18 lbs. (8.2kg) 16 lbs. (7.3kg) 17 lbs. (7.7kg) Note: Specifications are subject to change without notice or obligation... - Page 31 Celestron 2835 Columbia Street Torrance, CA 90503 U.S.A. Tel. (310) 328-9560 Fax. (310) 212-5835 Website www.celestron.com Copyright 2008 Celestron All rights reserved. (Products or instructions may change without notice or obligation.) Item # 21062-INST Printed in China $10.00 01-08...