Orion StarBlast II 4.5 EQ Instruction Manual
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Orion StarBlast II 4.5 EQ Instruction Manual

Equatorial newtonian reflector telescope
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INSTRUCTION MANUAL
Orion
®
StarBlast
II 4.5 EQ
™
#9250 Equatorial Newtonian Reflector Telescope
®
Customer Support:
www.OrionTelescopes.com/contactus
Corporate Offices:
89 Hangar Way, Watsonville CA 95076 – USA
Providing Exceptional Consumer Optical Products Since 1975
Copyright © 2017 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 576 Rev. A 02/17

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Summary of Contents for Orion StarBlast II 4.5 EQ

  • Page 1 Copyright © 2017 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 576 Rev. A 02/17...
  • Page 2 Declination Leg lock knob Right ascension setting circle lock knob Right ascension setting circle Latitude scale Latitude lock T-bolt Latitude adjustment Figure 1a. T-bolt Azimuth lock knob The StarBlast II 4.5 EQ Figure 1b. The StarBlast II 4.5’s equatorial mount.

  • Page 3: Table Of Contents

    Orion telescope.Your new StarBlast II 4.5 EQ is a terrific starter instrument for exploring the exotic wonders of the night sky. Designed to be compact and easy to use, it will provide many hours of enjoyment for the whole family.

  • Page 4: Getting Started

    T-bolt the thumbscrews on the end of the drawtube. Your StarBlast II 4.5 EQ is now fully assembled and should resemble Figure 1a. Leave the dust cover on the front of the optical tube when it is not in use.
  • Page 5 Tube ring clamps Dec. lock knob RA lock knob Figure 4. Proper usage of the equatorial mount requires the telescope tube to be balanced on both the R.A. and Dec. axes. With the R.A. lock knob released, slide the counterweight along the counterweight shaft until it just counterbalances the tube. When you let go with both hands, the tube should not drift up or down.
  • Page 6 Azimuth adjustment Knob Power Knob Battery compartment cover Mounting bracket Altitude adjustment Knob Figure 5. The EZ Finder II reflex sight. Figure 7. The EZ Finder II superimposes a small red dot (it’s not a laser!) on a non-magnified field of view, which helps to center an object in the telescope’s field of view.

  • Page 7: Setting Up And Using The Equatorial Mount

    When the object is centered in the eyepiece and on the reflex sight’s red dot, To polar align the StarBlast II 4.5 EQ: the EZ Finder II is properly aligned with the telescope.
  • Page 8 Let’s say you want to view an object that is directly So, the coordinates for the Orion Nebula listed in a star atlas will overhead, at the zenith. How do you do it?
  • Page 9 Figure 10. This illustration show the telescope pointed in the four cardinal directions north south east west. Note that the tripod and mount have not been moved; only the telescope tube has been moved in the R.A. and Dec. axes. One thing you DO NOT do is make any adjustment to the latitude Similarly, to point the telescope directly south, the counterweight shaft should again be horizontal.

  • Page 10: Collimating The Optics

    R.A. and Dec. axes. Depending on the altitude of the object you want to observe, Your StarBlast II 4.5 EQ comes with a collimating cap (Figure the counterweight shaft will be oriented somewhere between 12).This is a simple cap that fits on the focuser drawtube like a...

  • Page 11: Astronomical Observing

    the three alignment setscrews while tightening the other two, as A simple star test will tell you whether the optics are, in fact, depicted in Figure 14. You will need a 2.5mm hex key to do this. accurately aligned. The goal is to center the primary mirror reflection in the second- Star-Testing the Telescope ary mirror, as in Figure 11d.
  • Page 12 “boil” . If you look up at the sky and stars are twinkling noticeably, the seeing is For example, the StarBlast II 4.5 EQ has a focal length of 450mm, poor and you will be limited to viewing at lower magnifications. At which when used with the supplied 15mm eyepiece yields: higher magnifications, images will not focus clearly.

  • Page 13: Care And Maintenance

    Any quality optical lens cleaning tissue and optical lens cleaning front opening of the StarBlast II 4.5 EQ. The primary attraction is fluid specifically designed for multi-coated optics can be used to sunspots, which change shape, appearance, and location daily.

  • Page 14: Specifications

    One-Year Limited Warranty This Orion product is warranted against defects in materials or workmanship for a period of one year from the date of purchase. This warranty is for the benefit of the original retail purchaser only. During this warranty period Orion Telescopes &...

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9250

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