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Orion AstroView 55028 Instruction Manual
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Orion AstroView 55028 Instruction Manual

Equatorial refractor telescope
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INSTRUCTION MANUAL
Orion
AstroView
102mm
®
™
Equatorial Refractor Telescope
#55028
Corporate Offices: 89 Hangar Way, Watsonville CA 95076 - USA
Toll Free USA & Canada: (800) 447-1001
International: +1(831) 763-7000
Customer Support: support@telescope.com
A N E M P L O Y E E - O W N E D C O M P A N Y
Copyright © 2022 Orion Telescopes & Binoculars. All Rights Reserved. No part of this product instruction or any of its contents
may be reproduced, copied, modified or adapted, without the prior written consent of Orion Telescopes & Binoculars.
IN 673 05/22

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Summary of Contents for Orion AstroView 55028

  • Page 1 A N E M P L O Y E E - O W N E D C O M P A N Y Copyright © 2022 Orion Telescopes & Binoculars. All Rights Reserved. No part of this product instruction or any of its contents may be reproduced, copied, modified or adapted, without the prior written consent of Orion Telescopes &...

  • Page 2: Table Of Contents

    Orion telescope. . Your new AstroView 102mm Equatorial Refractor Tele- scope is a terrific instrument designed to provide outstanding views of celestial wonders. These instructions will help you set up, properly use, and care for your telescope. Please read them over thoroughly before getting started.

  • Page 3: Assembly

    II. Assembly of the star diagonal into it (Figure 9). Then retighten the thumbscrews to hold the star diagonal in place. 1. Spread the tripod (A) legs apart and stand the tripod on An eyepiece is the optical element that magnifies the image the ground.
  • Page 4 Latitude Retaining adjustment clip T-bolt (pre- installed) Latitude adjustment T-bolt Tray tab (need to Mount install) attachment Figure 2. A ) Place center of accessory tray over the center of the knob leg brace assembly. ) Press down and twist tray until the tabs click under retaining clips.

  • Page 5: Understanding And Using The Equatorial Mount

    Dovetail saddle Saddle clamp knobs Dec. lock knob R.A. lock knob Dec. slow-motion cable R.A. slow-motion cable Safety stop Figure 4. A ) Thread the counterweight shaft onto the mount. ) After removing the safety stop, slide the counterweight onto the shaft.
  • Page 6 Sight tube Dovetail Mounting bar Saddle Saddle clamp knobs Figure 8. Attach the EZ Finder II by sliding the bracket it into the Figure 7. Install the optical tube on the mount by placing the dovetail shoe as shown, then secure it with the thumbscrew on the dovetail bar into the saddle, then secure it by tightening the two shoe.
  • Page 7 Tracking Celestial Objects For example, the coordinates for the Orion Nebula (M42) are: When you observe a celestial object through the telescope, R.A. 5h 35.4m Dec. -5° 27' you’ll see it drift slowly across the field of view. To keep it in the...
  • Page 8 That’s 5 hours and 35.4 minutes in right ascension, and -5 coordinate listed in the star atlas for the object. Retighten the degrees and 27 arc-minutes in declination (there are 60 arc- thumb screw. minutes in 1 degree of declination). Calibrating the Setting Circles Before you can use the setting circles to locate objects, the Using a star atlas or astronomy planetarium program, identify...
  • Page 9 Pointer Little Dipper (in Ursa Minor) N.C.P. Big Dipper (in Ursa Major) Polaris Dec. setting Cassiopeia circle Figure 14. To find Polaris in the night sky, look north and find the Big Dipper. Extend an imaginary line from the two "Pointer Stars" in Pointer the bowl of the Big Dipper.

  • Page 10: Astronomical Observing

    Choosing an Observing Site When selecting a location for observing, get as far away as possible from direct artificial light such as street lights, porch lights, and automobile headlights. The glare from these lights will greatly impair your dark-adapted night vision. Set up on a grass or dirt surface, not asphalt, because asphalt radiates more heat.
  • Page 11 Eyepiece Selection the image is sharp. If you’re having trouble achieving initial focus, rack the focuser drawtube all the way in using the focus wheels, Magnification, or power, is determined by the focal length of then while looking into the eyepiece slowly turn the focus wheels the telescope and the focal length of the eyepiece being used.

  • Page 12: Telescope Care And Maintenance

    Orion, for instance, in a circular motion, then remove any excess fluid with a fresh you won’t have much luck locating the Orion Nebula. A simple lens tissue. Oily fingerprints and smudges may be removed planisphere, or star wheel, can be a valuable tool for learning using this method.

  • Page 13: Specifications

    Optical tube length: 26.5" Focuser: 2" rack-and-pinion, accepts 2" and 1.25" accessories Eyepieces: 25mm and 10mm Plossl, 1.25" barrel diameter, threaded for Orion filters Eyepiece magnification: 28x (25mm eyepiece) and 70x (10mm eyepiece) Finder scope: EZ Finder II reflex sight Diagonal: 90-degree mirror star diagonal Dew shield outer diameter: 5.0"...
  • Page 14 A N E M P L O Y E E - O W N E D C O M P A N Y Copyright © 2022 Orion Telescopes & Binoculars. All Rights Reserved. No part of this product instruction or any of its contents...