Meade ETX-80 Telescopes, Meade ETX-90AT Telescope, Meade ETX-105AT Telescope, and Meade ETX-125AT Telescope models build on the original Meade ETX EC Telescopes concept to create the most advanced electronically-controlled telescopes - including automatic GO TO object-location with the Meade Autostar Computer Controller - ever produced in their price range. And yet without sacrificing any of the user-friendly features that started the ETX Telescope Revolution.
Optical Systems: Manufactured at the Meade Irvine, California, facility, Meade ETX Maksutov Cassegrain Telescopes produce superlative, diffraction-limited optical performance and resolution. Optics so high in contrast, image brightness, and resolution that Meade ETX 80 AT TC, Meade ETX 90 AT, Meade ETX 105 AT, and Meade ETX 125 AT models often outperform many telescopes of larger apertures. We have a Meade ETX 125 in our collection of telescopes.
|Fork Mounts with Standard-Equipment Dual-Axis Drive System and Meade #497 Autostar Controller: The rigid fork mountings of Meade ETX Maksutov-Cassegrain Telescopes include high-torque DC motors on both telescope axes, permitting electronic operation from the standard-equipment Autostar controller. With the telescope placed in the altazimuth mode on a table, astronomical object-tracking may be accomplished automatically, after a quick and easy 2-minute alignment of Autostar #497 to the sky. Alternately, Meade ETX Telescope may be mounted in either the altazimuth or equatorial modes on the standard-equipment Meade #884 Deluxe Field Tripod.
Cordless Field Operation: The drive base of each ETX Meade Telescope accepts eight (user-supplied) AA-batteries that power the telescope for about 20 hours of normal usage, negating any requirement for an external power source in the field. Alternately, Meade ETX Telescope may be powered from an automobile cigarette lighter plug, using the optional Meade #607 Power Cord.
Flip-Mirror System: Flip the internal, optical-flat mirror "up" for observing in the standard 90° position; flip the mirror "down" for terrestrial observing with the optional Meade #932 45° Erecting Prism or for photography with the optional Meade #64 T-Adapter.
Materials and Coatings: Meade ETX Optical Systems include a Maksutov meniscus corrector lens of Grade-A BK7 optical glass. This lens is individually hand-figured by a Meade master optician to achieve an optical null in combination with the Pyrex® primary mirror. High transmission magnesium fluoride (MgF2) coatings on both sides of the correcting lens, as well as aluminum/silicon monoxide coatings on the primary and secondary mirrors, are provided as standard equipment. Optional coatings, described below, increase light transmission and reflectance still further.
Take a look at Meade ETX-80 Telescope Manual (44 pages PDF format) for details on our Meade ETX-80 Telescopes
Meade ETX Premier Edition Telescope models are also available as Meade ETX-90 PE, ETX-105 PE, or a larger ETX-125 PE astronomical telescopes.
|Ultra-High Transmission Coatings (UHTC): Available optionally with the Meade ETX 90AT, Meade ETX 105AT, or Meade ETX 125AT, the Meade UHTC group permits the highest levels of light transmission (about a 20% increase in total telescope light transmission compared to the standard coatings) ever offered on amateur telescopes. The UHTC group, if desired, must be specified at the time of telescope order. Make sure to check out Meade ETX Premier Edition Telescopes
|"Our [ETX-105] sample, purchased from stock at a local telescope dealer, was in perfect collimation...the version-22Et Autostar we tested behaves like mature technology...we sent the scope to a series of targets spread across the sky. It found each one with 100 percent success...Indeed, 90 percent of the targets were positioned within the center half of the field of view...Views of the Moon and planets were all satisfyingly crisp. The rings of Saturn, including the Cassini Division, were sharply rendered, and Jupiter's faded Red Spot was easy to see as it crossed the planet's central meridian...One of my most enjoyable moments with this Mak came while I was viewing Castor on a foggy evening that offered very good seeing. The scope split this unequal double star very cleanly and displayed the sort of Airy disks and diffraction rings that one sees in optical textbooks but seldom in real life." |
- from the review in Sky & Telescope, March, 2002.
|Standard Equipment: Meade ETX Astro Telescopes are supplied as complete instruments. Standard equipment includes a premium-grade Meade Series 4000 Super Plossl 26mm Eyepiece for 48x with the Meade ETX-90AT, 57x with the Meade ETX-105AT, or 73x with the Meade ETX-125AT Telescope. The 8 x 21mm viewfinder of the Meade ETX-90 AT incorporates an internal roof prism that results in an erect-image orientation, facilitating the quick location and field-centering of both terrestrial and astronomical objects. Meade ETX105 and Meade ETX125 Telescopes are supplied with an 8 x 25mm right-angle viewfinder for comfortable object-sighting with the larger instruments. The #884 Deluxe Field Tripod is included for rigid mounting of the telescope during standing or seated observing in either the altazimuth or equatorial mode. Use the standard-equipment #497 Autostar Controller for automatic GO TO object locating.
|The fully adjustable #884 Deluxe Field Tripod, included as standard equipment with ETX 90 AT, ETX 105 AT, and ETX 125 AT models, permits seated or standing observations in either the altazimuth or equatorial modes. The tripod has an elevation range of 20° to 90°. |
Specifications and Features: Meade ETX-80AT-TC, Meade ETX-90AT, Meade ETX-105AT, and Meade ETX-125AT, Meade Astronomical Telescope models
|Optical Design||Achromatic refractor||Maksutov-Cassegrain||Maksutov-Cassegrain||Maksutov-Cassegrain|
|Primary Mirror Diameter||-||96mm (3.78")||116mm (4.56")||138mm (5.43")|
|Clear Aperture||80mm (3.1")||90mm (3.5")||105mm (4.13")||127mm (5.0")|
|Focal Length, Focal Ratio||400mm, f/5||1250mm f/13.8||1470mm f/14 ||1900mm f/15|
|Near Focus (approx.)||17 ft. (5.2m)||11.5 ft. (3.5m)||15 ft. (4.6m)||15 ft. (4.6m)|
|Resolving Power (arc secs.) ||1.6||1.3||1.1||0.9|
|Optical Coatings||multi-coated objective lens||MgF2; standard aluminum/SiO||MgF2; standard aluminum/SiO||MgF2; standard aluminum/SiO|
|Ultra-High Transmission Coatings||-||optional at time of purchase||optional at time of purchase||optional at time of purchase|
|Limiting Visual Stellar Magnitude||11.3||11.7||12.1||12.5|
|Maximum Practical Visual Power||275X||325X||420X||500X|
|Optical Tube Dimensions (dia. x length)||3.6" dia. x 12" (9.3cm x 30.4cm)||4.1" x 11" (10.4cm x 27.9cm)||4.88" x 12.9" (12.4cm x 32.8cm)||5.75" x 14.2" (14.6cm x 36cm)|
4000 Super Plossl SP 9.7 mm And SP 26 mm 1.25"
Eyepieces ||Super Plossl 26mm||Super Plossl 26mm||Super Plossl 26mm|
|Secondary Mirror Obstruction (dia.; %)||-||1.1" (27.9mm); 9.6% ||1.32" (33.0mm); 9.4%||1.55" (39.4mm); 9.6%|
|Telescope Mounting||fork type; double tine||fork type; double tine||fork type; double tine||fork type; double tine|
|Setting Circle Diameters||Dec.: 3.7"; RA: 7"||Dec.: 3.5"; RA: 7"||Dec.: 3.81"; RA: 7.8"||Dec.: 4.3"; RA: 9"|
|RA and Dec. Motor Drive Systems ||DC servo motors with encoders, both axes; 9-volts DC||DC servo motors with encoders, both axes; 12-volts DC||DC servo motors with encoders, both axes; 12-volts DC||DC servo motors with encoders, both axes; 12-volts DC|
|Slow-Motion Controls||electric, 9-speed, both axes||electric, 9-speed, both axes||electric, 9-speed, both axes||electric, 9-speed, both axes|
|Autostar Controller||AutoStar Computer Controller (Meade #494) With Time Chip/Level/Compass||included (Meade
Autostar #497 )||included (Meade
Autostar #497 )||included (Meade
Autostar #497 )|
|Hemispheres of Operation||North and South||North and South||North and South||North and South|
|Batteries (user-supplied)||6 AA Batteries (Not Included)||8 x AA||8 x AA||8 x AA|
|Battery Life (approx.)||20 hrs||20 hrs||20 hrs||20 hrs|
|Bearings||Dec.: Acetal; RA: Nylon||Nylon, both axes||Dec.: ball bearings; RA: radial ball bearing||Dec.: ball bearings; RA: radial ball bearing|
|Tube Body Mounting||high-impact ABS aluminum||aluminum reinforced high-impact ABS||internal aluminum structure with high-impact ABS||internal aluminum structure with high-impact ABS|
|Primary MirrorCorrecting Lens||-||Pyrex® glassBK7 optical glass, Grade-A||Pyrex® glassBK7 optical glass, Grade-A||Pyrex® glassBK7 optical glass, Grade-A|
|Tripod; net weight||#882 Field Tripod; 6 lbs.||#884 Deluxe Field
Tripod; 11 lbs.||#884 Deluxe Field
Tripod; 11 lbs.||#884 Deluxe Field
|Telescope Dimensions||15" x 7.3" x 8.5"||15" x 7.3" x 8.5"||17" x 8" x 10"||19" x 8.9" x 10.8"|
|Telescope Net Weight, less tripod||Telescope 12.5 lbs , Tripod 8lb||7.8 lbs (3.5 kg)||13.5 lbs. (6.1 kg)||15.2 lbs. (6.9 kg)|
|Telescope Shipping Weight, less tripod||15.9 lbs (5.4 kg)||12.4 lbs (5.6 kg)||18.4 lbs (8.3 kg)||25.2 lbs. (11.4 kg)|
|"I find it impossible to choose adequate words that describe the extraordinary performance of the ETX [90mm]. My first object was the waxing gibbous Moon. At 50X the image showed incredible contrast and sharpness along the terminator. It begged for higher magnifications. At 190X the lunar image fully maintained its rock-hard focus. Even at 350X, one hundred power per inch of aperture, no breakdown of the image occurred. Now I had to give the ETX the most sensitive test of all, viewing a second magnitude star at this same extreme power. The 350X star image was a textbook classic. Clearly defined, faint, concentric diffraction rings surrounded the small, bright Airy disc. Taking the star both in and out of focus revealed identically sized secondary shadow obstructions. Clearly, I was observing through an optical system that has no detectable wavefront error." - Ron Smith, Professor of Astronomy, Santa Rosa Junior College, Santa Rosa, California. |
|Optional Accessories: Fifteen optionally available eyepieces permit magnification ranges of from 31X to over 300X with the ETX-90AT, from 37X to over |
|For terrestrial observing with the Meade ETX-90AT Telescope, Meade ETX-105AT Telescope, and Meade ETX-125AT Telescope, Meade Astro Telescopes, the #932 45° Erecting Prism attaches to the telescope's rear cell and presents correctly-oriented images, viewed at a convenient 457deg; angle. Also shown in this photo are the Declination lock, focuser knob, and flip-mirror knob. |
|400X with the ETX-105AT, or from 48X to over 450X with the ETX-125AT. Meade Super Plossls are excellent eyepieces with any ETX model, or use a Meade Super Wide 13.8mm ocular, Meade Super Wide 18mm ocular, or Meade Super Wide 24.5mm ocular for spectacular moderate-power, wide-angle observing. The #126 2x Barlow Lens, a special short-focus Barlow ideally suited to ETX telescope systems, doubles the power of any eyepiece. For terrestrial photography or astrophotography of the Moon and planets, the Meade #64 T-Adapter threads to the telescope's rear cell and, with the appropriate T-mount, accepts any 35mm camera with removable lens. |
|The #64 T-Adapter converts ETX telescopes into long-focus telephoto lenses for attachment to 35mm camera bodies by means of the appropriate T-Mount. In this way Meade Telescope ETX models may be used for terrestrial photography or for astrophotography of the Moon and planets. (With the ETX-80AT telescope use the #64ST T-Adapter.)
|Meade #497 Autostar Computer Controller |
|One of the most important advances in telescope control in the past 25 years, the Meade
#497 Autostar Computer Controller turns the ETX-90AT, ETX-105AT, or ETX-125AT into an automatic celestial object locating system. Just plug the Autostar into the telescope's HBX port, do a quick (less than one minute!) telescope alignment, and you're ready to observe any object in the Autostar's 30,000-object database.Best of all, the Meade
Autostar is easy to use: |
| Even the most novice observer will find himself or herself locating dozens of fascinating celestial objects the very first night out - from commonly-observed objects such as the rings of Saturn, the satellites of Jupiter, and the Orion Nebula (M42); to more difficult objects such as the Ring Nebula (M57) in Lyra, the Spiral Galaxy (M33) in Triangulum, and the Sombrero Galaxy (M104) in Virgo; to very obscure objects near the telescope's threshold of visibility such as the diffuse nebula NGC 6559 in Sagittarius, the galactic star cluster NGC 1778 in Auriga, and the spiral galaxy NGC 3310 in Ursa Major. |
|Any of Autostar's database objects can be called up and entered on the hand controller display in seconds. The observer then simply presses the GO TO pushbutton and watches as the telescope automatically slews (moves) to the object and places it in the field of view. The effect of Autostar is to bring objects easily within reach which were previously unreachable for all but the most dedicated of amateur astronomers. |
Without exaggeration the Meade Autostar Computer Controller opens up a new era in astronomical study for the casual or beginning astronomer, just as Meade LX200 and Meade LX200GPS Schmidt-Cassegrains have for the advanced amateur. Most Autostar users see more celestial objects in one night's viewing than typical first-time telescope owners previously have in a lifetime.
|Object Database: Included within Autostar's database are all of the following astronomical objects - a range of objects certain to keep even the most active amateur astronomer growing in his or her studies of the skies for years: |
|5,386||objects from the Index Catalog (IC); galaxies, nebulae, and star clusters of all types; the complete Index Catalog|
|7,840||objects from the New General Catalog (NGC); additional galaxies, nebulae, and star clusters of all types; the complete New General Catalog|
|109||objects from the Caldwell Catalog of the best objects for small telescopes|
|110||Messier (M) objects; the complete Messier catalog|
|16,800||stars from the Smithsonian Astrophysical Observatory (SAO) catalog, including double stars, variable stars, and other stars of special note|
|26||asteroids, including all of the brightest asteroids|
|8||major planets from Mercury to Pluto|
|Any of the objects in the preceding listing can be located simply by calling up the object from the Autostar database and pressing GO TO. Within seconds Autostar directs the ETX telescope to move automatically to the object and place it within the telescopic field of view with uncanny precision. |
|"Stellar diffraction patterns were virtually textbook-perfect...the Cassini Division in Saturn's rings popped into view despite the rings' low tilt. [Double-star] Epsilon Lyrae's component stars were cleanly split...The Moon was outstanding even at 75X per inch of aperture. Daytime terrestrial views were tack-sharp with rich color saturation. I could see every wisp of velvet on the antlers of a deer 50 feet away... the ETX [90mm] was totally free of chromatic aberration, making this an ideal all-purpose telescope for anyone wanting to inspect eagles at 100 yards and stars at 100 light-years." |
- from the review in Sky & Telescope, January 1997.
|Call-up of an object from the database is facilitated by Autostar's simple menu options. For example, to enter NGC 6960 on the Autostar display, the observer selects in sequence (and in a few seconds of keystrokes): OBJECT/DEEP SKY/NGC OBJECTS/6960. When GO |
|The ETX-90AT Astro Telescope, mounted in the equatorial mode on the #884 Deluxe Field Tripod. Tripod height is continuously adjustable from 25" to 43". A graduated scale for elevation (latitude) angle permits precise polar alignment of the telescope's fork mount. |
|TO is pressed, the telescope moves at 5° per second on both axes, simultaneously, to place NGC 6960, the Veil Nebula in the constellation Cygnus, in the telescope's field of view. |
Additional Capabilities: In addition to database object selection and observation, Autostar permits a wide array of fascinating and educational capabilities:
Automatic GO TO capability to any astronomical object of known Right Ascension and Declination, plus digital readouts of telescope position, continuously in RA and Dec.
Precise sidereal-rate tracking in either altazimuth or equatorial modes. Once an object is located by Autostar, the telescope automatically tracks it and keeps it centered in the telescope's field of view, fully compensating for the Earth's rotation.
200 User-Defined Objects: The observer can add the locations of up to 200 objects of his/her choosing, store these objects in Autostar's memory, and call them up at any time.
9-Speed Dual-Axis Operation: Use the Autostar pushbuttons to move the telescope on either or both axes, simultaneously, at any of nine drive speeds, from 2x sidereal to 5°/second. Guided Tours: Allows Autostar to choose the best objects for observing on any given night.
|Point-and-click astronomy with Meade AstroFinder software, the Meade #505 Connector Cable Set, and an Meade ETX telescope. |
|GO TO capability through Autostar's RS-232 serial interface*, using Meade AstroFinderTM astronomical software: Use the optionally-available package of AstroFinder software and the #505 Connector Cable Set to form a system consisting of the Meade ETX telescope + Meade Autostar + your PC. Point and click to any celestial object on the PC display and watch as the telescope moves to the object and places it in the field of view. |
Plus: over 20 other menu options, including major event menus (e.g., times of Moonrise, Moon phases, etc.); utility functions (e.g., timer, alarm, eyepiece power calculations); and much more.
With Autostar plugged into your ETX-80AT-TC, ETX-90AT, ETX-105AT, or ETX-125AT, the astronomical universe is in the palm of your hand: never before has such powerful telescope technology been so easy to operate, even by the most casual observer.
*For PC's with USB ports order the Meade USB to RS-232 Bridge Cable, which premits connection between the telescope's RS-232 serial interface and the PC's USB port.
|ETX-90AT Astro Telescope: For the casual or beginning observer the Meade ETX-90AT may be all the telescope ever required. Or, for the advanced astronomer who already owns a larger instrument, the ETX-90AT is the perfect ultraportable, diffraction-limited field telescope.
|Specifications: ETX-90AT Astro Telescope - Includes Maksutov-Cassegrain
optical tube assembly (D =
90mm (3.5"), F =
1250mm, f/13.8) with MgF2 coatings on the correcting lens and standard aluminum coatings on the primary and secondary mirrors (Ultra-High Transmission Coatings available optionally); internal flip-mirror system for either straight-through or 90° observing position; steel-reinforced ABS fork mount with electric slow-motion controls, setting circles and locks on both axes; electronic control panel; 9-speed (from 2x sidereal to 5°/sec) dual-axis motor drive system with #497 Autostar controller; sidereal-rate tracking in either altazimuth or equatorial mode; internal battery compartment accepting eight (user-supplied) AA-size batteries; 8 x 21mm erect-image viewfinder; Series 4000 Super Plossl 26mm eyepiece (1.25"); #884 Deluxe Field Tripod; operating instructions. |
Observe the continually changing cloud-belt patterns on the surface of the planet Jupiter; shadows cast on to Jupiter as one of its four principal satellites transits the planet's disc; the magnificent ring system and satellites of Saturn as well as dusky markings and the ring-shadow on the surface of Saturn; Moon craters by the hundred, plus lunar rilles, mountain ranges, and fault lines, all visible in brilliant, high-resolution, high-contrast detail; the variable phases of the planets Mercury and Venus; prominent features on the surface of Mars. In deep-space the motivated observer will find it difficult to exhaust the quantity of visible phenomena: the incandescent filamentary structure of the Orion Nebula; the elliptical luminosity of the Andromeda Galaxy with its brilliant nucleus; the shining orb of the Hercules globular cluster with many of its outermost stars resolvable.
|These are only a few of the literally thousands of celestial objects within the view of the Meade ETX-90AT telescope. Star catalogs list innumerable double and multiple star systems, variable stars, open star clusters, globular clusters, diffuse nebulosities, planetary nebulae, and spiral galaxies within the grasp of the instrument. The standard-equipment #497 Autostar Computer Controller locates all of these objects automatically, in seconds.
ETX-105AT Astro Telescope: Manufactured with an aluminum fork mount dedicated specifically to its size a
|Specifications: ETX-105AT Astro Telescope - Includes Maksutov-Cassegrain
optical tube assembly (D =
105mm (4.13"), F =
1470mm, f/14) with MgF2 coatings on the correcting lens and standard aluminum coatings on the primary and secondary mirrors (Ultra-High Transmission Coatings available optionally); internal flip-mirror system for either straight-through or 90° observing position; aluminum fork mount with electric slow-motion controls, setting circles and locks on both axes; electronic control panel; 9-speed (from 2x sidereal to 5°/sec) dual-axis motor drive system with #497 Autostar controller; sidereal-rate tracking in either altazimuth or equatorial mode; internal battery compartment accepting eight (user-supplied) AA-size batteries; 8 x 25mm right-angle viewfinder; Series 4000 Super Plossl 26mm eyepiece (1.25"); #884 Deluxe Field Tripod; operating instructions. |
|aperture, the Meade ETX-105AT Astro Telescope moves effortlessly across the skies on ball bearing axes, in either manual or electronic modes. And, at a relatively modest increase in purchase price, the Mead ETX-105AT yields 36% more light-collecting power than the Meede ETX-90AT. The entire range of celestial objects - the eight major planets, the Moon, galaxies, nebulae, star clusters - as well as terrestrial objects, may be observed with a significant, and immediately apparent, increase in resolution and image brightness. At the same time, the ETX-105AT maintains most of the compactness and ultraportability of the smaller-aperture ETX-90AT. As a compromise between the larger light-gathering capability of the Mead ETX-125AT and the ultraportability of the Mead ETX-90AT Telescope, the Mead ETX-105AT Telescope is an excellent, and very popular, choice. |
|Specifications: ETX-125AT Astro Telescope - Includes Maksutov-Cassegrain
optical tube assembly (D =
127mm (5.0"), F =
1900mm, f/15) with MgF2 coatings on the correcting lens and standard aluminum coatings on the primary and secondary mirrors (Ultra-High Transmission Coatings available optionally); internal flip-mirror system for either straight-through or 90° observing position; aluminum fork mount with electric slow-motion controls, setting circles and locks on both axes; electronic control panel; 9-speed (from 2x sidereal to 5°/sec) dual-axis motor drive system with #497 Autostar controller; sidereal-rate tracking in either altazimuth or equatorial mode; internal battery compartment accepting eight (user-supplied) AA-size batteries; 8 x 25mm right-angle viewfinder; Series 4000 Super Plossl 26mm eyepiece (1.25-); #884 Deluxe Field Tripod; operating instructions. |
|ETX-125AT Astro Telescope: With twice the light-collecting area of the ETX-90AT, the ETX-125AT permits a much broader range of astronomical study. Jupiter's cloud belts, for example, are observable at a significantly heightened level of detail, with whirls and festoons and the Great Red Spot readily visible as they transit the planet's disc; the Cassini Division in Saturn's rings is routinely seen, as are additional features of the planet's surface, even under less than perfect seeing conditions; microfine lunar detail beyond the reach of smaller telescopes can be resolved in the ETX-125AT. In deep-space the Meed ETX-125AT's larger aperture enables the observation of galaxies and nebulae in much wider extension and permits the resolution of celestial objects as faint as magnitude 12.5. The entire Messier listing of 110 objects is now not only visible, but, in addition, every object takes on a readily discernible structure. The observer who accepts astronomy as a serious field of interest will find the Meade ETX 125 AT telescope a deeply satisfying instrument for a lifetime of high-resolution astronomical study|