Meade Specifications ETX-90PE Astro Telescope, Specifications ETX-105PE Astro Telescope

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SPECIFICATIONS

Specifications: ETX-90PE Astro Telescope

Optical design . . . . . . . . . . . . . . . . . . . . Maksutov-Cassegrain Primary mirror diameter . . . . . . . . . . . . . . . . . . . 96mm (3.78”) Clear aperture. . . . . . . . . . . . . . . . . . . . . . . . . . . . 90mm (3.5”) Focal length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250mm Focal ratio (photographic speed). . . . . . . . . . . . . . . . . . . f/13.8 Near focus (approx) . . . . . . . . . . . . . . . . . . . . . . 11.5 ft (3.5m) Resolving power . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 arc secs Super multi-coatings (EMC) . . . . . . . . . . . . . . . . . . . . standard Limiting visual stellar magnitude (approx.) . . . . . . . . . . . . 11.7 Image scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.16°/inch Maximum practical visual power . . . . . . . . . . . . . . . . . . . 325X Optical tube dimensions

(dia. x length) . . . . . . . . . . . 10.4cm x 27.9cm (4.1” x 11”) Secondary mirror obstruction (dia.; %) . . 27.9mm (1.1”); 9.6% Telescope mounting . . . . . . . . . . . . . . . . fork type; double tine Setting circle diameters. . . . . . . . . . . . . . . . Dec.: 3.5”; R.A.: 7” SmartFinder. . . . . . . . . . . Red dot projected onto finder’s lens LNT Module . . . . . . High accuracy, temperature-compensated

. . . . . . . . . . . . . . . . . oscillator, updatable using Meade’s

. . . . . . . . . . . . . . . . . . . . . . . . optional ATUM accessory Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 volts DC Motor Drive System DC servo motors with encoders, both axes Bearings:

Altitude . . . . . . . . . . . . . . . . . . . . . . . UHMW polyethylene Azimuth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PTFE

Materials:

Tube body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . aluminum Mounting . . . . . . high-impact ABS, aluminum-reinforced Primary mirror. . . . . . . . . . . . . . . . . . . . . . . . Pyrex® glass Correcting lens . . . . . . . . . . . BK7 optical glass, Grade-A

Telescope dimensions:

. . . . . . . . . . . . . . . . 38cm x 18cm x 22cm (15” x 7” x 9”) Telescope net weight:

(incl. AutoStar & batteries) . . . . . . . . . . . . 3.5kg (7.8 lbs) Telescope shipping weight. . . . . . . . . . . . . . . . 5.8kg (12.8 lbs) Battery Life (approx.):

with AutoStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 hrs

Specifications: ETX-105PE Astro Telescope

Optical design . . . . . . . . . . . . . . . . . . . . Maksutov-Cassegrain Primary mirror diameter . . . . . . . . . . . . . . . . . . 116mm (4.56”) Clear aperture. . . . . . . . . . . . . . . . . . . . . . . . . . 105mm (4.13”) Focal length . . . . . . . . . . . . . . . . . . . . . . . . . . 1470mm (57.8”) Focal ratio (photographic speed) . . . . . . . . . . . . . . . . . . . . f/14 Near focus (approx) . . . . . . . . . . . . . . . . . . . . . . . . 4.6m (15 ft) Resolving power . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 arc secs Super multi-coatings (EMC) . . . . . . . . . . . . . . . . . . . . standard Limiting visual stellar magnitude (approx.) . . . . . . . . . . . . 12.1 Image scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.99°/inch Maximum practical visual power. . . . . . . . . . . . . . . . . . . . 420x Optical tube dimensions

(dia. x length) . . . . . . . . 12.4cm x 32.8cm (4.88” x 12.9”) Secondary mirror obstruction (dia.; %) . . . 3.3cm (1.32”); 9.4% Telescope mounting . . . . . . . . . . . . . . . . fork type; double tine Setting circle diameters . . . . . . . . . . . . . Dec.: 3.81”; R.A.: 7.8”

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Contents ETX Premier Edition Telescope Series Page Contents QUICK-START Guide Enter Key Scroll Scroll Up Down B and Fig Telescope FeaturesSmartFinder? See Aligning Ascension and Declination setting circles? SeeTelescope Controls SmartfinderAlt/Az, Right Ascension, Computer Control Panel see FigDefinitions Tour the Cosmos with Just the Push of a Button Autostar FeaturesAutoStar to the topmost screen Select Item Object About changing slew ETX TipsGetting Started Parts ListingHow to Assemble Your Telescope and Tripod Aligning SmartFinder Using SmartFinderChoosing an Eyepiece Too Much Power?Terrestrial Observing Observing Using AutoStar Arrow KeysObserving Observing by Moving the Telescope ManuallyTo Track an Object Automatically Slew SpeedsAstronomical Observing Observe the MoonAutomatic Alignment How to perform the Automatic Alignment procedureInitializing AutoStar for the First Time Which One’s the Alignment Star? Observe a Star using the Automatic Tracking FeatureGo To Saturn Using the Guided TourTo Calculate Sunset time Autostar OperationAutostar AutoStar Navigation ExerciseLook into the Future Entering data into AutoStarSelect Item Object Autostars MenusObserving Satellites? See Object MenuObject Menu options include Use the Object menu to select an object from the databaseUse the Glossary menu Event MenuGlossary Menu Use the Event menuTips Utilities MenuSetup Menu Periodic Error Correction? See Tip Shift Adding and editing sites? SeeTo Edit a Site Advanced Autostar OperationAdding Observing Sites To Add a Site to the user-defined site listTo GO to a user-entered object Using AutoStar to Find Objects Not in the DatabaseObserving Satellites Tour Modes How to Create Your Own Guided TourWhat you will need Writing a Tour Command LineComment Line Moon Downloading Tours LandmarksTo perform a Landmark Survey IdentifyTo Add a landmark to the database To Select a landmark from the databaseTwo-Star Alt/Az Alignment and Easy Align Advanced Alt/Az AlignmentDisplayed information Example PEC Train Menu Option Smart Drive Training Periodic Error CorrectionOne-Star Alt/Az Alignment PEC Erase Menu Option PEC Update Menu OptionBrowse Photography with a 35mm Camera PhotographyPhotography with a Digital Camera Few Tips on PhotographyDeep Sky Imager Photography with Meade’s AutoStar Suite#505 Cable Connector Kit With Meade AstroFinder Optional Accessories#932 45 Erecting Prism Maintenance Inspecting the Optics TroubleshootingStorage and Transport Telescope does not track a celestial object Meade Customer ServiceSpecifications ETX-105PE Astro Telescope SpecificationsSpecifications ETX-90PE Astro Telescope Specifications ETX-125PE Astro Telescope Telescope dimensions 43cm x 25cm x 20cm 17 x 10 xAutoStar Dimensions AutoStar SpecificationsCelestial Coordinates Equatorial AlignmentLoosen control latch Set latitude Locating Polaris City Country Latitude Appendix B Latitude ChartLatitude Chart for Major Cities of the World City State/Prov./Country LatitudeFurther Study Appendix C Training the DriveTo replace the battery Appendix Dchanging the LNT Module BatteryMoon Appendix Ebasic AstronomyAutoStar Glossary Deep-Sky Objects PlanetsPage 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.
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