Meade ETX Astro Telescope/ETX Spotting Scope Instruction Manual

Meade Instruments CorporationInstruction ManualETX-90EC Astro TelescopeETX-105EC Astro TelescopeETX-125EC Astro Telescope

- 10 -Using The ViewfinderAs with most astronomical telescopes,the ETX model telescopes present afairly narrow field of view to the observer.As a resu

- 11 -2. Point the main telescope at someeasy-to-find, well-defined land object,such as the top of a telephone pole.Center the object, as precisely as

- 12 -Understanding MagnificationThe magnification, or power, at which a telescope is operating is determined by two factors: the focal lengthof the t

- 13 -morning hours, before the ground hasbuilt up internal heat, results in betterviewing conditions than during the late-afternoon hours.If you wish

- 14 -Light 1 (top LED): The fastest speed. Use to move the telescope quickly from one point in the sky toanother.Light 2: Best for centering an objec

- 15 -applications and for casual astronomical observation. The telescope may be placed on a rigid tabletop oron the optional Meade #883 Deluxe Field

- 16 -configuration the observer does not need to press the Arrow keys of the Electronic Controller in order totrack celestial objects. However, the A

- 17 -There are two mounting methods available to polaralign the telescope depending on whether you use theoptional #883 Deluxe Field Tripod or a tabl

- 18 -and horizontal locks. In thisorientation the telescope’s opticaltube is lined up parallel to thetripod’s adjustable leg.8. Note the line and arr

- 19 -Format 2 utilizes both sections of the#64 T-Adapter threaded together toform a rigid unit. In this configurationthere is no field vignetting: im

- 20 -OPTIONAL ACCESSORIESA wide assortment of professional Meade accessories are available for the for ETX telescopes. Meadeaccessories greatly exten

- 21 -#825 8 x 25mm Right-Angle Viewfinder: Included as standard-equipment on ETX-105EC and ETX-125ECmodels, the 8 x 25mm Right-Angle Viewfinder (Fig.

- 22 -GENERAL MAINTENANCEYour ETX model telescope is a precision optical instruments designed to yield a lifetime of rewardingobservations. Given the

- 23 -Inspecting the OpticsA Note About the “Flashlight Test:" If a flashlight or other high-intensity light source is pointed down the mainteles

- 24 -• If inside a warm house or building, move outside. Interior air conditions may distort terrestrial or celestialimages, making it difficult, if

- 25 -Specifications:ETX-90EC Astro TelescopeOptical design . . . . . . . . . . . . . . . . . . . Maksutov-CassegrainPrimary mirror diameter . . . . .

Appendix A: ADVANCED ELECTRONIC CONTROLLER FUNCTIONSTracking Motor Speeds In the polar mode the Electronic Controller normally tracks objects at the s

Appendix B: HELPFUL CHARTSLatitude Chart for Major Cities of the World To aid in the polar alignment procedure (see page 16), latitudesof major cities

Appendix C: PRECISE POLAR ALIGNMENT; SETTING CIRCLESIf desired, you may obtain more precise polar alignment by first accomplishing basic polar alignme

- 29 -OBJECTS IN SPACEIn the early 17th century, Italian Scientist Galileo, using a crude telescope considerably smaller than theETX-90EC, turned it t

Quick-Start Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Telescope Electronic Controller Functions . . . . . . . . .5ETX: Your Pe

- 30 -Jupiter (Fig. 34) is the largest planet in oursolar system, with a diameter 11 times that ofEarth. Jupiter appears as a disk with dark linesstre

MEADE LIMITED WARRANTYEvery Meade telescope, spotting scope, and telescope accessory is warranted by Meade Instruments Corporation (“Meade”)to be free

Ver. 0501 Part no. 14-1010-20ADVANCED PRODUCTS DIVISIONMeade Instruments CorporationWorld’s Leading Manufacturer of Astronomical Telescopes for the

Remove the ETX from its packaging and place it on asturdy surface. Place the eyepiece (A) and viewfinder(B) into their appropriate positions on the te

- 5 -1 29511106(on leftfork arm)1641913157320Fig. 1: The ETX-90EC Astro Telescope.Features of the ETX-90EC, ETX-105EC, and ETX-125EC areidentical, wit

- 6 -ETX:Your Personal Window to the UniverseThe Meade ETX-90EC, ETX-105EC, and the ETX-125EC are extremely versatile, high-resolutiontelescopes with

- 7 - Computer Control PanelA. ON/OFF Switch - Turns the Computer Control Panel and Electronic Controller ON or OFF.Note: Always remove the batteries

Electronic Controller FunctionsFig. 3: Electronic Controller. (1) Arrow Keys; (2) IndicatorLights; (3) SPEED Key; (4) Coil Cord; (5) MODE Key; (6) OUT

- 9 -GETTING STARTEDParts ListETX telescopes are assembled virtuallycomplete at the Meade factory. Getting thetelescope ready for first observationsre