Meade ETX-90PE Telescope does not track a celestial object, Meade Customer Service

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Object appears in the SmartFinder but not in the eyepiece:

The SmartFinder is not properly aligned with the telescope (see ALIGNING SMARTFINDER, page 13).

Slew speed does not change when you press the SPEED key or the telescope moves slowly even though the fast slew speed is chosen:

• The battery power may be low (see HOW TO ASSEMBLE, page 12).

Telescope does not track a celestial object:

Make sure that the telescope is correctly aligned. See AUTOMATIC ALIGNMENT, page 17, for more information.

Images through the eyepiece appear unfocused or distorted:

The magnification may be too high for the viewing conditions. Back off to a lower power eyepiece (see CHOOSING AN EYEPIECE, page 14).

If inside a warm house or building, move outside. Interior air conditions may distort terrestrial or celestial images, making it difficult, if not impossible, to obtain a sharp focus. For optimal viewing, use the telescope outside in the open air instead of observing through an open or closed window or screen.

If viewing a land object on a warm day, heat waves will distort the image (see

TERRESTRIAL OBSERVING, page 15).

For clear viewing of objects, turn the focus knob (8, Fig. 1b) slowly since the “in- focus” point of a telescope is precise. Turning the focus knob too quickly may cause the focus point to pass without notice.

The optics within the telescope need time to adjust to the outside ambient temperature to provide the sharpest image. To cool down the optics, set the telescope outside for 10 to 15 minutes before observing begins.

Telescope moves off a terrestrial object while observing:

Verify that the vertical and horizontal locks are tight (see TELESCOPE FEATURES, page 6).

Telescope does not move past a certain point:

The built-in vertical or horizontal rotational “stops” may have been reached. See #6, page 7.

Telescope pauses when changing slew direction:

• This pause is normal.

A terrestrial object appears reversed left-for-right:

An eyepiece in the standard 90° observing position (4, Fig. 1b) reverses an object left-for-right: To view a correctly oriented image requires the optional #932 Erecting Prism (see OPTIONAL ACCESSORIES, page 42).

Meade Customer Service

If you have a question concerning your ETX model, call the Meade Instruments Customer Service Department at (949) 451-1450. Customer Service hours are 7:00 AM to 6:00 PM, Pacific Time, Monday through Friday. In the unlikely event that the ETX requires factory servicing or repairs, write or call the Meade Customer Service Department first, before returning the telescope to the factory, giving full particulars as to the nature of the problem, as well as your name, address and daytime telephone number. The great majority of servicing issues can be resolved by telephone, avoiding return of the telescope to the factory.

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Contents ETX Premier Edition Telescope Series Page Contents QUICK-START Guide Enter Key Scroll Scroll Up Down Telescope Features B and FigSmartfinder Ascension and Declination setting circles? SeeTelescope Controls SmartFinder? See AligningDefinitions Computer Control Panel see FigAlt/Az, Right Ascension, Autostar Features Tour the Cosmos with Just the Push of a ButtonAutoStar to the topmost screen Select Item Object ETX Tips About changing slewHow to Assemble Your Telescope and Tripod Parts ListingGetting Started Using SmartFinder Aligning SmartFinderToo Much Power? Choosing an EyepieceObserving by Moving the Telescope Manually Observing Using AutoStar Arrow KeysObserving Terrestrial ObservingObserve the Moon Slew SpeedsAstronomical Observing To Track an Object AutomaticallyInitializing AutoStar for the First Time How to perform the Automatic Alignment procedureAutomatic Alignment Observe a Star using the Automatic Tracking Feature Which One’s the Alignment Star?Using the Guided Tour Go To SaturnAutoStar Navigation Exercise Autostar OperationAutostar To Calculate Sunset timeEntering data into AutoStar Look into the FutureAutostars Menus Select Item ObjectUse the Object menu to select an object from the database Object MenuObject Menu options include Observing Satellites? SeeUse the Event menu Event MenuGlossary Menu Use the Glossary menuUtilities Menu TipsSetup Menu Periodic Error Correction? See Tip Adding and editing sites? See ShiftTo Add a Site to the user-defined site list Advanced Autostar OperationAdding Observing Sites To Edit a SiteObserving Satellites Using AutoStar to Find Objects Not in the DatabaseTo GO to a user-entered object What you will need How to Create Your Own Guided TourTour Modes Comment Line Command LineWriting a Tour Moon Landmarks Downloading ToursTo Select a landmark from the database IdentifyTo Add a landmark to the database To perform a Landmark SurveyDisplayed information Example Advanced Alt/Az AlignmentTwo-Star Alt/Az Alignment and Easy Align One-Star Alt/Az Alignment Smart Drive Training Periodic Error CorrectionPEC Train Menu Option Browse PEC Update Menu OptionPEC Erase Menu Option Photography Photography with a 35mm CameraFew Tips on Photography Photography with a Digital CameraPhotography with Meade’s AutoStar Suite Deep Sky ImagerOptional Accessories #505 Cable Connector Kit With Meade AstroFinder#932 45 Erecting Prism Maintenance Storage and Transport TroubleshootingInspecting the Optics Meade Customer Service Telescope does not track a celestial objectSpecifications ETX-90PE Astro Telescope SpecificationsSpecifications ETX-105PE Astro Telescope Telescope dimensions 43cm x 25cm x 20cm 17 x 10 x Specifications ETX-125PE Astro TelescopeAutoStar Specifications AutoStar DimensionsEquatorial Alignment Celestial CoordinatesLoosen control latch Set latitude Locating Polaris City State/Prov./Country Latitude Appendix B Latitude ChartLatitude Chart for Major Cities of the World City Country LatitudeAppendix C Training the Drive Further StudyAppendix Dchanging the LNT Module Battery To replace the batteryAutoStar Glossary Appendix Ebasic AstronomyMoon Planets Deep-Sky ObjectsPage Meade Limited Warranty

ETX-90PE specifications

The Meade ETX-90PE is a well-regarded telescope that combines portability and performance, making it a popular choice among both amateur astronomers and seasoned stargazers. Its compact design and advanced features make it an ideal instrument for those who seek to explore the night sky with ease.

At the heart of the ETX-90PE is its Maksutov-Cassegrain optical design, which utilizes a spherical primary mirror and a corrector lens to deliver exceptional image quality. With a focal length of 1250mm and a 90mm aperture, it strikes a balance between light-gathering ability and magnification, allowing users to observe celestial objects such as planets, star clusters, and distant galaxies in remarkable detail. The telescope's focal ratio of f/13.9 provides crisp and sharp views, making it particularly well-suited for planetary observation.

One of the standout features of the ETX-90PE is its Electronic Control System (ECS), which allows for easy and intuitive operation. The telescope is equipped with a built-in AutoStar Computerized GoTo mount, enabling users to locate and track over 30,000 celestial objects with just a few simple commands. With automatic alignment features, even beginners can get started quickly, making the wonders of the universe accessible to everyone.

Portability is a key characteristic of the Meade ETX-90PE. Weighing in at a mere 12.5 pounds, it can be easily transported to dark sky locations. Its compact design not only translates to ease of transport but also means it can be stored conveniently when not in use. The included sturdy aluminum tripod provides stable support, even during extended observation sessions.

The ETX-90PE further enhances the user experience with its high-quality accessories. It comes with a set of eyepieces, including a 26mm Super Plössl and a 9.7mm Plössl, allowing for various magnifications to suit different observing preferences. The telescope also features a built-in flip mirror, allowing for easier viewing through both the eyepiece and a camera, making astrophotography more accessible.

Additionally, the ETX-90PE is designed with user comfort in mind. The telescope offers adjustable slow-motion controls for fine-tuning views and an optical finder scope to help locate objects before zooming in. With robust construction, excellent optics, and a range of advanced features, the Meade ETX-90PE stands out as a versatile, high-quality telescope for both casual observers and serious astronomers alike. Its combination of technology and user-friendly functions makes it an enduring favorite for anyone looking to embark on a journey through the cosmos.