Meade LX90-8ACF 8" f/10 Catadioptric GoTo Telescope

Meade LX90-8ACF 8" f/10 Catadioptric GoTo Telescope

Meade LX90-8ACF 8" f/10 Catadioptric GoTo Telescope

B&H # MELX90ACF8Q MFR # 0810-90-03

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Product Highlights

  • 8" (203mm) Catadioptric OTA
  • 2032mm Focal Length, f/10 Focal Ratio
  • Advanced Coma-Free/UHTC Optical Systems
  • Motorized Dual-Tine Alt-Az Fork Mount
  • AudioStar GoTo Computer Hand Controller
  • 30,000+ Object Database, Guided Tours
  • Astronomer Inside Multimedia System
  • 26mm Eyepiece, 90° Diagonal
  • 8x50 Finderscope with Crosshair Reticle
  • Adjustable-Height Stainless Steel Tripod
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Meade LX90-8ACF overview

  • 1Description

The Meade Instruments LX90-8ACF 8" f/10 Catadioptric GoTo Telescope utilizes 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. Supporting the entire system is an adjustable-height stainless steel tripod. 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.

Optical Tube Assembly
  • 8" (203.2mm) aperture
  • f/10 focal ratio
  • 2032mm focal length
  • Advanced Coma-Free catadioptric design
  • Ultra-High Transmission Coatings (UHTC) system
  • Resolution: 0.57 arcsec, Dawes' Limit
  • Secondary mirror obstruction: 13.7%, by area
  • Single-speed internal focusing mechanism
  • 1.25" SCT screw-in visual back
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
  • 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
  • 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 objects:
  • 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
  • Dimensions:
  • Length: 6.6" (17cm)
  • Width, top: 3.2" (80cm)
  • Width, bottom: 2.25" (57cm)
  • Depth: 0.8" (21cm)
  • Weight: 17.9 oz (508g)
Mount and Tripod
  • Mount:
  • 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
  • Tripod:
  • Stainless steel legs provide a solid platform with limited vibrations
  • Adjustable height of 34-54" accommodates a variety of users and viewing positions
  • Center tray holds accessories and eyepieces, while acting as a stabilizer for the legs to improve stability and limit vibrations
  • Spiked feet provide improved stability on soft or uneven ground
  • Weight: 25 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
  • 90° angle places head in a comfortable viewing position, especially when OTA is pointed at or near the zenith
  • Star configuration corrects images horizontally, but not vertically
  • Finder:
  • 8x50 configuration
  • Low magnification provides a wide field of view for easier object finding
  • Large aperture reveals many objects smaller finders can't
  • Illuminated crosshair reticle ensures proper centering without obstructing target
  • Variable-intensity LED illumination
  • Quick release mounting bracket
UPC: 709942370508
In the Box
Meade LX90-8ACF 8" f/10 Catadioptric GoTo Telescope
  • Series 4000 26mm Super Plossl Eyepiece (1.25")
  • Standard Field Tripod
  • 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
    • 1Description

    Meade LX90-8ACF specs

    Optical Tube Assembly
    Optical Design Schmidt Cassegrain
    Aperture 203 mm / 8"
    Focal Length 2032 mm
    Focal Ratio f/10
    Eyepiece Barrel Diameter 1.25"
    Diagonal Yes, 90 Star
    Finderscope Yes
    Type Motorized; Alt-Azimuth Dual Fork
    GoTo Capability Yes, AudioStar
    Type Adjustable
    Material of Tripod Stainless Steel
    Batteries 8 x C
    Weight 33.0 lb / 15.0 kg (Fully Assembled)
    25.0 lb / 11.3 kg (Tripod)
    Packaging Info
    Package Weight 69.95 lb
    Box Dimensions (LxWxH) 39.0 x 35.0 x 14.0"

    Meade LX90-8ACF reviews

    LX90-8ACF 8" f/10 Catadioptric GoTo Telescope is rated 4.4 out of 5 by 7.
    Rated 4 out of 5 by from Love it After owning a Meade ETX90, I made the switch to the largest aperture I could handle and a scope I wouldn't grow out of. This is it. The main reason I bought this and not their competitors is because this is the only model with the features I required that does not need an external power supply. Anything larger and I wouldn't want to carry it. Anything smaller and I wouldn't be getting the most out of the deep space object (DSO's) I enjoy observing. This makes it all the more awesome for solar system objects as well. There were/are a couple minor problems but nothing I can't handle. Optically and functionally, the telescope is spectacular and thus far I am well satisfied. For what it's worth, B&H offered this item for less than ANYONE on the internet for this particular model, so I jumped on it without hesitation.
    Date published: 2013-08-20
    Rated 3 out of 5 by from NICE SCOPE POOR TECHNICAL SUPPORT A really nice telescope with fine optics. Their TECHNICAL support however, is surly, disinterested,and flippant. Initially, the tripod was defective, Meade Customer support was excellent and got a new one to me ASAP. The 2nd tripod was defective. I sent Meade an email, received help from the TS director and we corresponded multiple times. I was very succinct regarding the problem, but he kept answering everything but the question. I called him twice and he never returned my phone calls. I finally fixed the problem myself. Not something that Iwould expect to have to do with a nearly 2000.00 product. When there were questions about the alignment process, that is when things continued downhill with their TS department. On 2 different phone calls the rep. was rushed and unclear. When I told him I did not know where a certain star was and that is why I purchased a self aligning scope, he said vary flippantly, go buy a star chart. It is a nice scope and we have gotten some spectacular views. But do not look for very much helpful support from their TECHNICAL support dept. Based soley on ther TECH SUPPORT I would not buy another MEADE scope.
    Date published: 2016-02-07
    Rated 5 out of 5 by from Great Telescope I purchased this telescope to upgrade from the ETX 90 and improve my observation of deep sky objects. It has fulfilled this need very well.
    Date published: 2014-12-05
    Rated 5 out of 5 by from LX90-ACF 8 as my first telescope. The Meade LX90-ACF 8 for a complete novice is an absolute dream to work with, although I was really nervous prior to the first night about the whole alignment process and not having a level piece of concrete or something sturdy to set it on, so on the grass in the yard it went. I spent quite a bit of time getting the tripod and mount absolutely level before bringing out the OTA (Optical Tube Assembly). Once I felt like I had it as level as possible with the small provided bubble level/compass I mounted the OTA. The Audiostar handbox controller is very simple to use with an easy to understand menu. After opting for the Automatic 2 Star Align using Compass North setting instead of True North, since I don't have a equatorial wedge. It takes your current GPS coordinates and exact time down to a fraction of a second then just headed for 2 bright stars from it's own database, asked me to agree it was in the center of the field of view and then said to press enter. You have a slew speed adjustability from 1 to 7 degrees per second so you can go very slow and precise or at 64x which is 7 degrees per second slew speed you can move very quickly from one object to the next. Once I did the alignment once on each star, a message came up Align Successsfull. I then scrolled through the menu and looked for the Moon to Goto ( this was an obvious target to see if it was set up ok ) And to my amazement it slewed straight for it ! After looking at the moon through these beautiful optics with such a clarity and magnification that it made me feel like I was looking at it in 3D and could actually see the topography of the surface, not just light and dark spots like I was used too. It blew me away! My next target was Saturn and bulls eye again. I have to admit I could almost reach out and touch the Moon as the clarity was unbelievable and Saturn although slightly smaller was also amazing to look at. To be able to see so clearly another planet that at it's closest about 750 million miles away from Earth (8 times the distance from Earth to the Sun). And to see, without impedance, the rings around Saturn that are made of of dust, micro-meteors and mostly ice that is only about 1 mile thick is a true testament to the photon collection ability of an 8 aperture telescope with high quality optics. The Advance Coma Free (ACF) corrector lens with the Ultra High Transmission Coatings (UHTC) relieve the Scmidt-Cassegrain of it's only real downfall to its inherent design. It will have an object that is in focus at the center of the field of view and also have objects all of the way to the edge of the field of view in crisp focus also because of the ACF. A ground breaking design for Scmidt-Cassegrains that is now being implemented by other manufacturers in somewhat similar ways. I then spent a further 2 hours just playing with the Audiostar using the Guided Tour and the Best Sites tonight feature. Which also includes very informative audio guide that will tell you everything there is to know about what you are looking at. All in all I'm really impressed that I've have something that is easy to use with a design so great and I have found the known all to well, Meade blue, aesthetically pleasing. Now some items that are definitely worth buying with this telescope kit are some quality eyepieces. I love my Meade 5000 series Ultra Wide Angle eyepieces. The 8.8mm, 14mm, 20mm are amazing and the included Meade Super Plossl 26mm eyepiece is a great all around useful eyepiece. I also got a 12.5 illuminated reticle eyepiece for making sure objects are truly centered while doing the alignment. It has enhanced the ability to slew straight to an object and have it centered in the eyepiece without fail. I am just getting into astrophotography and if you believe you are going to be doing very much astrophotography then it is worth the few extra hundred dollars to have a of axis ccd guided tracker mounted on a equatorial wedge to cut down on field rotation and to give you the ability to expose a shot and track it exactly from horizon to horizon. Without that you are limited on the exposure lengths to around 3 minutes before stars begin to elongate a bit. Due to the fact that using the Altitude/Azimuth mode is using a programmed sidereal tracking algorithm. If you have an off axis guider it will connect to your handbox auxiliary port to control tracking by following a predetermined object you wish to track. And having it on a wedge will allow it to only track in the Right Ascension direction due to the OTA being Polar Aligned from your latitude. Now theLX90can be made to do this but getting theLX200makes it so much easier. For theLX90you have to buy adapters and have a laptop connected to a ccd tracking finder scope and you can buy the equatorial wedge for it as well but after what you have spent in getting it to the abilities of theLX200, you would have spent less by just buying aLX200. Also invest in a quality self centering laser collimator to make sure you have your secondary mirror precisely aligned. A dew shield is a great help for the more humid areas and now I dont have dew on the ACF primary lens any longer. At first without having the dew shield on, it would start to fog over within an hour or so. And the only fault I can find with theLX90is the finder scope mounting screws. They are plastic and all of them but two have stripped. You can find aftermarket metal ones. My additions so far are Meade Series 5000 UWA eyepieces 8.8mm 14mm and 20mm, a Series 5000 2 Diagonal, a Meade Dew Shield, the Hotech Advance Laser Collimator, the 12.5mm Orion Illuminated Reticle Wireless Plossl eyepiece, Meade's counterbalance kit but I have the 2-axis ADM Accessories counterbalance kit on a Vixen rail, Some Tele-Vue 1.25 filters and a 2 Orion Variable Polarizer 40%-1% Light Transmission 2-Piece Filter which can be separated into a circular polarizer, Zeiss Optical Cleaning Kit, the Meade LXPS7 12 volt DC battery with a bright white flashlight and a smaller flashlight with a red filter cap on it that has two cigarette lighter ports and two usb ports which I use to power my LX90 for a consistent and long period that is rechargeable and lastly a Orion Dual Beam Variable Brightness flashlight that hangs around your neck that gets a lot of use. The few accessories that are in route to my place currently are the Nikon D5500 DSLR, Nikon T-Ring and a SCT to T-Adapter and a focal-reducer. I went with Nikon because of some reviews for the astrophotography on that camera, and I will be getting it modded also. And I have numerous Nikon Lenses and a couple shoe-mounted flashes. So staying with Nikon was the obvious choice. As I am wanting to get into some astrophotography. So the camera and adapters should all arrive by 10-7-15. Which is next Wednesday I believe. I was once asked If I could go out, with money not being an object, what telescope would I buy? I said The Keck Observatory with jest. But really for a home observatory that is semi-portable, I would go with the Meade LX850-ACF 16 F8. So in conclusion, this telescope I believe is absolutely the best, not only for the money but also the best to get as your first semi-professional or big daddy amateur telescope, however it is described. It price to quality is outstanding. Best value for the astronomer who wants to get into a large aperture telescope who will use it mainly as an awesome observation telescope but may upgrade it to be a decent astrophotography telescope. I love the design of a Schimdt-Cassegrain. It is kind of a hybrid of a refractor and a reflector. As you can have a large aperture with a long focal length in compact package. Great job Meade! Clear Skies, Jared K.
    Date published: 2015-10-02
    Rated 5 out of 5 by from Fantastic! I recently received this as a Christmas present, and I couldn't have asked for more! It's an amazing piece of equipment. Setup is simple, and alignment is just as easy. The GPS inputs your location, date and time, the telescope slews to two bright objects, you center them and press Enter, and off you go!Being in the Pacific Northwest, the weather hasn't been too kind this time of year so I've only had a few opportunities to use it, but those few times have been incredible. With a good alignment, every goto is in the eyepiece. The view of Jupiter is awe-inspiring! I added the Meade Series 5000 2 diagonal and the Celestron 2 Eyepiece and Filter Kit, and I heartily recommend them. The expanded field of view is majestic. The mount and tripod are very sturdy, giving very little shake when focusing.Viewing from my back patio (which is South-facing, luckily) I use the Meade AC adapter for power. The only negative is that the finderscope came with one collimation screw stripped, which made using it a bit of a challenge. However, I found that you can purchase them direct from Meade, in a 10 pack for $. So I did. The finderscope is now perfectly aligned. Now if the sky will just cooperate, I'll be good to go. (It will eventually. Patience is a virtue!)Overall, this is a fantastic telescope. One that will always reward you with incredible views of the night sky.
    Date published: 2014-01-23
    Rated 4 out of 5 by from Great Quality Affordable ACF Scope I received this telescope a couple weeks ago and am very satisfied. Years ago I used to have a 4 reflecting telescope, eventually giving it away. I would consider myself an advanced beginner. Over the past 6 months I did a lot of research on what type and size telescope plus what would fit into my budget. My needs were portability, ease of use, possible astrophotography in the future, and quality of viewing. It has been a while since I viewed through a telescope, just binoculars and my eyes. I decided to go with the Meade LX-90 GPS with ACF optics. It took a lot of reading the manual, getting familiar with all the parts and how they operate. My advice is to set it up and knowing where all the parts are during daylight. By doing this it makes it easier when it is dark outside. I am lucky to live in Northern California and have very good skies to view. Be patient with the scope and all of its technology, auto-alignment is not always perfect, but with practice it becomes easier. So far I have taken it out 6 times and the viewing is exceptional. Moon clarity and detail, Jupiter's clarity, and the Andromeda galaxy. My recommendation is to buy a complete lense and filter kit and also a nebular filter (it will help with pollution and bring in more clarity with deep sky objects). Pros: ACF optics Sony GPS True North Technology Lots of available accessories Autostar High quality product Cons: Still feels heavy 53 pounds, but I did not want to go with a smaller scope. Really need to purchase a lense and filter kit which costs more money. And Make sure you have a place to store it, right now it's taking up a whole corner of my living room.
    Date published: 2009-11-19
    Rated 5 out of 5 by from GREAT Telescope I made the move from an ETX90 to this telescope to improve my viewing of deep space objects. So far its been fantastic and has lived up to its reputation for quality.
    Date published: 2014-12-05
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