User Manual for Meade LX90-8ACF 8" f 10 Catadioptric GoTo Telescope Click to enlarge the picture
Contents of the user manual for the Meade LX90-8ACF 8" f 10 Catadioptric
- Product category: Catadioptrics (Cassegrains) Meade
- Brand: Meade
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Meade Catadioptrics (Cassegrains)
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User manual for the Meade LX90-8ACF 8" f 10 Catadioptric contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Meade product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Meade user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Meade product will considerably shorten its lifespan!
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Product description Powerful, portable, and versatile, the Meade Instruments LX90-8ACF 8" f/10 Catadioptric GoTo Telescope provides users with a competent observational platform to view the Moon, planets, and deep-sky objects, all packed into a compact form factor.The optical tube assembly (OTA) employs their Advanced Coma-Free (ACF) catadioptric light path to reduce color fringing and off-axis comas to enable it to clearly resolve dim deep-sky objects and easily split binary stars with tack-sharp clarity. Complementing the ACF system is their Ultra-High Transmission Coatings (UHTC) system, which improves light transmission through the entire light path across the whole visible spectrum. A combination of high-transmittance lens coatings and highly reflective mirror coatings boosts image brightness while minimizing internal and external light loss and diffraction.The next generation of their iconic GoTo system, the AudioStar hand controller, is packed with over 30,000 objects and features audio commentary on select celestial objects to give users information, history, and mythology through its onboard speaker. Multiple assisted alignment procedures help to get users observing faster, aided by an onboard 16-channel GPS module for precise setup and alignment. There is also an option for guided tours to be generated by the AudioStar, or to be custom-made by the user, downloaded to the controller, and uploaded to the internet and shared.An aluminum dual-tine alt-az fork mount carries the optical tube assembly (OTA) and runs on eight user-supplied C-cell batteries for off-the-grid observation sessions. To get users out and observing immediately, Meade includes a low-power eyepiece, a 90° star diagonal, and an 8x50 finderscope. Powerful, portable, and versatile, this 8" iteration of the LX90 can be easily transported to remote locations to reveal the wonders of the universe. It is offered here without a tripod for those users who already have a reliable support system or permanent pier that is capable of carrying it. - Optical Tube Assembly
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- Large 8" (203.2mm) aperture reveals exceptional lunar and planetary details, while allowing the observation of dimmer deep-sky objects
- Moderate f/10 focal ratio allows for shorter exposure time during astrophotography sessions without dimming the image
- Long 2032mm focal length helps to produce the moderate focal ratio and improves magnification potential
- Advanced Coma-Free catadioptric design yields superior image quality and long effective focal length while maintaining a compact form factor
- Ultra-High Transmission Coatings (UHTC) system maximizes light transmission through the entire optical system
- 0.57 arcsec Dawes' Limit resolution enables small objects to be more easily seen while allowing close objects, like binary stars, to be split
- Secondary mirror obstruction: 13.7%, by area
- Single-speed internal focusing mechanism
- Standard 1.25" SCT screw-in visual back is compatible with the most popular size of eyepieces and accessories
- Optical Technologies
- Advanced Coma-Free system:
- Reduces off-axis comas and astigmatism for sharper images
- Eliminates diffraction spikes for better resolution
- Aplanatic design produces flat, distortion-free images across the field of view—especially at the edges
Ultra-High Transmission Coatings (UHTC):- All corrector plate and mirror surfaces are fully multi-coated to maximize light transmission and limit light loss
- Engineered to optimize visual, photographic, and CCD imaging
- Improve light transmission across the entire visible spectrum through the optical path
- Corrector plate coatings made up of multiple layers of aluminum oxide (Al2O3), titanium dioxide (TiO2), and magnesium fluoride (MgF2)
- Mirror coatings consist of aluminum with multi-layer coatings of titanium dioxide (TiO2) and silicon dioxide (SiO2)
- AudioStar GoTo Computer Hand Controller
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- Two-line LED display
- Twenty-key alphanumeric keypad, red LED backlight
- 68HC11, 8MHz processor
- Built-in red utility light
- 30,000+ object database
- User-friendly menu-driven system navigation
- Slew speeds: 1x, 2x, 8x, 16x, 64x, 128x sidereal; 1.5°/sec, 3°/sec, 6.5°/sec, max
- Tracking rates: Sidereal, Lunar, Custom (select from 2000 incremental rates)
- Assisted alignment procedures: Easy (Two-Star), One-Star, Two-Star
- Customizable guided tours for specific day, time, and location
- Astronomer Inside: Built-in speaker provides over 5 hours of audio commentary on over 500 objects including scientific data and history
- Projects events to plan future astronomy sessions such as sunrise/sunsets, Moon phases/moonrise/moonset, meteor showers; lunar/solar eclipses, equinoxes/solstices
- Smart Drive Permanent Periodic Error Correction (PPEC) allows system to learn tracking errors and continually improve tracking over time
- Backlash compensation allows user to train out the intrinsic play between gears to improve GoTo and tracking accuracy
- Powered by mount to be lighter and easier to use
- 24" coiled cord
- Updatable via Internet, and remote computer control of the mount, using RS-232 port
Database details:- Solar system, including Moon, Sun, planets
- Comets and asteroids
- 88 major constellations
- Popular named objects
- Galaxies, quasars, and nebulae
- Multiple catalogs including Messier, Caldwell, and NGC
- Stars, including named stars, SAO catalog, double stars, variable stars
- Satellites, including the International Space Station (ISS) and Hubble Space Telescope (HST)
- User-defined astronomical and terrestrial objects
- Mount
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- Aluminum motorized dual-tine alt-azimuth fork
- Integrated 16-channel GPS module obtains accurate day, time, location information without requiring user input
- Large 4.875" worm gears
- Dual-axis mechanical locks allow adjustment without power
- Adjustable hand controller holder keeps AudioStar safe while avoiding cord-wrap
- Runs on eight user-supplied C-cell batteries; 60-hour max runtime
- OTA and mount only: tripod or permanent pier required for proper use
- Total weight for mount and OTA: 33 pounds
- Included Accessories
- Eyepiece:
- 1.25"-diameter barrel
- Accepts most 1.25" astronomical filters
- 26mm Super Plossl eyepiece produces 78x
- 52° apparent angle of view
- 18mm eye relief
- Fold-down rubber eyecup
Diagonal:- 1.25" snout and eyepiece holder is compatible with the most common size of eyepieces and accessories
- 90° angle places head in a comfortable viewing position, especially when OTA is pointed at or near the zenith
- Star-diagonal design corrects images horizontally, but not vertically
Finderscope:- 8x power magnifies the night sky while preserving a wide field of view
- Large 50mm objective lens allows dimmer reference stars to be visible to provide more alignment star options
- Illuminated crosshair reticle ensures proper centering without obstructing target
- Variable-intensity LED illumination
- Quick release mounting bracket
UPC: 709942999594 In the Box Meade LX90-8ACF 8" f/10 Catadioptric GoTo Telescope (OTA & Mount Only) Series 4000 26mm Super Plossl Eyepiece (1.25") zyfcwqyqevuucaft AudioStar GoTo Hand Controller #828 8x50 Rear-Focus Viewfinder (Blue) 1.25" 90° Star Diagonal Motorized Altazimuth Mount Set of Hex Wrenches Bubble Level / Compass Eyepiece Insert Limited 1-Year Warranty Table of Contents
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Technical parametersMeade LX90-8ACF Specs | Optical Design | Advanced Coma-Free Catadioptric | | Aperture | 8.0" / 203.2mm | | Focal Length | 2032mm | | Focal Ratio | f/10 | | Eyepiece Barrel Diameter | 1.25" | | Diagonal | 90° star
1.25" snout and eyepiece holder | | Finderscope | 8x50
Illuminated crosshair reticle | | Tripod | None | | Mount Type | Dual-Tine motorized alt-azimuth fork | | GoTo Capability | AudioStar hand controller | | Power Source | 8 x C-cell batteries | | Optical Tube Dimensions | Not specified by manufacturer | | Weight | 33.0 lb / 15.0 kg |
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