Orion 9535, 9533, 9536 instruction manual Telescope Basics

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1.Select Hibernate from the Utility Menu.

2.Move the telescope to a desire position and press

ENTER.

3.Power off the telescope. Remember to never move your telescope manually while in Hibernate mode.

Once the telescope is powered on again the display will read Wake Up. After pressing Enter you have the option of scrolling through the time/site information to confirm the current setting. Press ENTER to wake up the telescope.

Pressing UNDO at the Wake Up screen allows you to explore many of the features of the hand control without waking the telescope up from hibernate mode. To wake up the telescope after UNDO has been pressed, select Hibernate from the Utility menu and press ENTER. Do not use the direction buttons to move the telescope while in hibernate mode.

Sun Menu

For safety purposes the Sun will not be displayed as a database object unless it is first enabled. To enable the Sun, go to the Sun Menu and press ENTER. The Sun will now be displayed in the Planets catalog as can be used as an alignment object when using the Solar System Alignment method. To remove the Sun from displaying on the hand control, once again select the Sun Menu from the Utilities Menu and press ENTER.

Scrolling Menu

This menus allows you to change the rate of speed that the text scrolls across the hand control display.

Press the Up (number 6) button to increase the speed of the text.

Press the Down (number 9) button to decrease the speed of the text.

Telescope Basics

A telescope is an instrument that collects and focuses light. The nature of the optical design determines how the light is focused. Some telescopes, known as refractors, use lens- es. Other telescopes, known as reflectors, use mirrors. The StarSeeker 80mm telescope is a refractor telescope that uses an objective lens to collect light. The StarSeeker 114mm and 130mm are reflecting telescopes with a primary and second- ary mirror to gather and focus light.

Focusing

Once you have found an object in the telescope, turn the focusing knob until the image is sharp.To achieve a truly sharp focus, never look through glass windows or across objects that produce heat waves, such as asphalt parking lots.

For astronomical viewing, out of focus star images are very diffuse, making them difficult to see. If you turn the focus knob too quickly, you can go right through focus without seeing the image. To avoid this problem, your first astronomical target should be a bright object (like the Moon or a planet) so that the image is visible even when out of focus. It can even be helpful to practice during the day on an object at least a mile away.

Reversed from left to right, as

Inverted image as viewed

viewed with a star diagonal

with the eyepiece directly in

 

telescope

Image Orientation

The image orientation of any telescope changes depending on how the eyepiece is inserted into the telescope. A refrac- tor used with a star diagonal, for astronomical viewing, will show an image that is right side up, but left-right reversed. Refractors can be used for terrestrial observation and show the image right side up and non-reversed. When observing through a reflector (114mm and 130mm models) the image will appear upside down and backwards.

Calculating Magnification

You can change the power of your telescope just by changing the eyepiece (ocular). To determine the magnification of your telescope, simply divide the focal length of the telescope by the focal length of the eyepiece used. In equation format, the formula looks like this:

Focal Length of Telescope (mm) Magnification = Focal Length of Eyepiece (mm)

Let’s say, for example, you are using the 25mm eyepiece. To determine the magnification you simply divide the focal length of your telescope (for example, the StarSeeker 130mm has a focal length of 650mm) by the focal length of the eyepiece, 25mm. Dividing 650 by 25 yields a magnification of 26 power.

Although the power is variable, each instrument under aver- age skies has a limit to the highest useful magnification. The general rule is 2x per millimeter of aperture. For example, the StarSeeker 80mm is so named for its objective diameter. 80mm x2 = 160. 160x is as high of a magnification one can achieve under ideal seeing conditions. Although this is the maximum useful magnification, most observing will yield best results at lower powers.

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. In equation format, the formula looks like this:

Apparent Field of Eyepiece

True Field =

Magnification

 

As you can see, before determining the field of view, you must calculate the magnification. Using the example in the previous section, we can determine the field of view using the same 25mm eyepiece. The 25mm eyepiece has an apparent field of view of 56°. Divide the 56° by the magnification, which is 26 power. This yields an actual field of view of 2.2°.

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Contents Orion StarSeekers Star Pointer Finderscope Starseeker 80mm Refractor Telescope Parts Identification Collimation Adjustment KnobsParts List Table of ContentsAssembly IntroductionAssembling the StarSeeker Accessory trayUnderneath Attaching the Telescope to the TripodInstalling the EZ Finder StarSeeker FocusingFocus knob EyepieceHand Controller Powering the StarSeekerOperation Attaching the Hand ControlRate Button Direction ButtonsInitial Set-Up Alignment ProcedureDefinition Use the Up and Down scroll keys to choose betweenSky Align Tips for Using Sky AlignOne-Star Align Auto Two-Star AlignTwo Star Alignment Solar System Align Tips for Using Solar System AlignStarSeeker Re-Alignment Selecting an ObjectSet Up Procedures Tour ModeSlewing to an Object Finding PlanetsIdentify Utility Features Scope Setup FeaturesTelescope Basics Celestial Observing Telescope Maintenance Collimating the StarSeeker 130mm Collimating the StarSeeker 114mmAll SpecificationsStarSeeker StarSeeker Menu TreeGlossary of Terms Appendix aPage Appendix B RS-232 Connection Maps of Time Zones Appendix CPage Page Page Page Page Page Page Two-Year Limited Warranty

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