Orion 4.5 EQ instruction manual One-Year Limited Warranty, Specifications

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clips held by two screws each. Loosen the screws and remove the clips.

You may now remove the primary mirror from its cell. Do not touch the surface of the mirror with your fingers. Lift the mirror carefully by the edges. Set the mirror on a clean soft towel. Fill a clean sink free with room temperature water, a few drops of liquid dishwashing detergent, and if possible, a capfull of 100% isopropyl alcohol. Submerge the mirror (aluminized face up) in the water and let it soak for a few minutes (or hours if it’s a very dirty mirror). Wipe the mirror under water with clean cotton balls, using extremely light pressure and stroking in straight lines across the mirror surface. Use one ball for each wipe across the mirror. Then rinse the mirror under a stream of lukewarm water. Any particles on the surface can be swabbed gently with a series of cotton balls, each used just one time. Dry the mirror

Small Phillips-head screws (3)

Figure 15. To remove the mirror cell from the telescope, the three small Phillips-head screws on the perimeter of the mirror cell must be completely unthreaded.

in a stream of air (a “blower bulb” works great), or remove any stray drops of water with the corner of a paper towel. Cover the mirror surface with tissue, and leave the mirror in a warm area until it is completely dry before replacing it in the mirror cell and telescope.

9. Specifications

Primary mirror: 4.5" (114mm) diameter, parabolic, center marked

Effective focal length: 450mm

Focal ratio: f/3.9

Minor axis of secondary mirror: 1.3" (34mm)

Mirror coatings: Aluminum with silocon dioxide (SiO2) overcoat

Focuser: Rack-and-pinion, accepts 1.25" eyepieces

Eyepieces: 15mm and 6mm Expanse eyepieces, fully coated with multi-coatings, 1.25" barrel diameter, accept Orion filters

Eyepiece magnification: 30x (with 15mm eyepiece) and 75x (with 6mm eyepiece)

Finder scope: EZ Finder II reflex sight

Mount: EQ-1, German equatorial

Tripod: Aluminum

Motor drives: Optional

Total instrument weight: 17 lbs.

One-Year Limited Warranty

This Orion StarBlast 4.5 EQ 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 & Binoculars will repair or replace, at Orion’s option, any warranted instrument that proves to be defective, provided it is returned postage paid to: Orion Warranty Repair, 89 Hangar Way, Watsonville, CA 95076. If the product is not registered, proof of purchase (such as a copy of the original invoice) is required.

This warranty does not apply if, in Orion’s judgment, the instrument has been abused, mishandled, or modified, nor does it apply to normal wear and tear. This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state. For further warranty service information, contact: Customer Service Department, Orion Telescopes & Binoculars, 89 Hangar Way, Watsonville, CA 95076; (800)676-1343.

Orion Telescopes & Binoculars

89 Hangar Way, Watsonville, CA 95076

Customer Support Help Line (800)676-1343 • Day or Evening

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Contents Orion StarBlast 4.5 EQ #9798 Equatorial Newtonian Reflector TelescopeDeclination lock knob Declination setting circle Assembly Table of ContentsParts List UnpackingGetting Started Balancing the TelescopeFocusing the Telescope 4a.4b 4c.4dOperating the EZ Finder II Reflex Sight Setting Up and Using the Equatorial MountDo You Wear Eyeglasses? Aligning the EZ Finder II Reflex SightUse of the R.A. and Dec. Slow-Motion Control Cables Polar AlignmentTo polar align the StarBlast 4.5 EQ Tracking Celestial ObjectsFinding Objects with the Setting Circles Understanding the Setting CirclesCalibrating the Right Ascension Setting Circle Confused About Pointing the Telescope?Collimating the Optics Collimating Cap and Primary Mirror Center Mark Aligning the Secondary MirrorAligning the Primary Mirror Star-Testing the TelescopeAstronomical Observing Choosing an Observing SiteEyepiece Selection Cooling the TelescopeLet Your Eyes Dark-Adapt What to ExpectCare and Maintenance One-Year Limited Warranty Specifications