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Orion Telescopes
*2nd* Orion StarMax 90mm TableTop Maksutov-Cassegrain
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Item #  80022

Whoever coined the phrase "big things come in small packages" would love the Orion StarMax 90 TableTop Mak-Cass telescope. This pint-sized powerhouse provides surprisingly big views, making it a fantastic first telescope or a pleasantly portable grab-and-go second telescope when you don't want to lug out the "big rig."

The long, 1250mm focal length (f/13.9) Mak-Cass optics give the StarMax 90 telescope some serious magnifying power ? much more-so than reflector or refractor telescopes of similar aperture. And all in a tube that's just 11" long, including the accessory collar on the back end. The included 20mm and 10mm 4-element eyepieces yield powers of 62.5x and 125x magnification, respectively, to get in tight on your targets. Also, the StarMax's 90mm diameter aperture collects 225% more light than a traditional beginner's 60mm refractor telescope, so you'll see more celestial goodies. You'll be able to enjoy bright, detailed views of the battered lunar landscape, Saturn's picturesque rings, and Jupiter's meandering moons. As you scan the Milky Way, you'll also be wowed by the sights of well-resolved open and globular star clusters as well as brighter Messier nebulas. Focusing the telescope is easy by simply turning the large focusing knob on the back end of the telescope.

The optical tube assembly of the Orion StarMax 90mm TableTop Mak-Cass Telescope attaches to the stable, rotating base via a quick-release dovetail mount with adjustable altitude tension. Set the compact StarMax 90mm on the ground, on a table in the back yard, or even on the hood of your car in the backcountry, and comfortably view the heavens to your heart's content. And if there isn't a table nearby, you can easily attach the StarMax 90's altazimuth base to a field tripod. A threaded 3/8"-16 socket on the bottom of the base can be coupled to any field tripod equipped with a standard 3/8" threaded post.

The StarMax 90mm TableTop Maksutov-Cassegrain comes with an array of great accessories to help you make the most out of each evening under the stars:

The included Orion EZ Finder II red-dot scope makes it "EZ" to aim the telescope.

Following a simple alignment procedure, use the EZ Finder II "red dot scope" to accurately aim the StarMax 90mm at objects in the sky like the Moon and bright planets. Just peer through the EZ Finder's viewing window and move the telescope until the red dot is positioned on the object you want to observe. And voila! ? the object will appear right in the telescope's eyepiece, ready to view.

You get quality 20mm and 10mm 4-element eyepieces with the StarMax 90mm.

A cut above standard 3-element Kellner eyepieces, the oculars included with the StarMax 90 have four elements and are multi-coated to deliver crisp, contrasty views. Start with the 20mm eyepiece to study your target at 62.5x magnification. Then, if seeing conditions allow, swap in the 10mm eyepiece to boost the magnification to a whopping 125x. Both eyepieces have threaded barrels to allow use of Orion filters, including the glare-reducing Moon filter that comes with the telescope.

The included 90 star diagonal provides comfortable viewing of objects overhead.

The star diagonal deflects the light path of the StarMax 90mm 90 so you can enjoy the view without having to contort yourself into awkward positions to peer into the eyepiece.

Cut the Moon's glare to see more detail on its surface with the Orion E-Series Moon Filter.

The Orion E-Series 1.25" 13% Transmission Moon Filter reduces glare and boosts contrast so you can see enjoy more detailed views of lunar surface features. It blocks excessively bright glare to provide a more comfortable view of the Moon's surface, the neutral density filter will not alter the natural color of the Moon and the eyepiece filter transmits only 13% of the incoming light, improving contrast and detail.

Explore the Moon and identify its craters, spacecraft landing sites, and more with your telescope!

With locations and names of over 260 features on the Moon such as craters, mountains, valleys, and "seas", the Orion MoonMap 260 is a wonderful tool for all amateur astronomers. Keep it handy while you look through the telescope to help identify lunar features as you observe them. "Wow, that bright crater is named Tycho!"

One other feature of the StarMax 90mm telescope that is worth noting: Its optics never need adjusting, unlike with reflector telescopes, for example. The StarMax's Maksutov-Cassegrain optics are precisely aligned at the factory and fixed in place to insure maximum image sharpness, without need for the user to make any further tweaks.

So if the idea of an ultra-portable yet very powerful, take-anywhere telescope seems kinda cool to you, we've got just the ticket: the Orion StarMax 90mm TableTop Maksutov-Cassegain telescope. Get yours today and share the fun of space exploration with your family and friends.

NOTE: The StarMax 90mm telescope can be used for daytime terrestrial observing, but you will want to purchase a "correct-image" 1.25" diagonal so that the image seen in the eyepiece is oriented "normally." With the included star diagonal, views will be "mirror reversed." This is not an issue when observing objects in space, but for terrestrial viewing we recommend picking up a correct-image diagonal.

Meets or exceeds all California State Environmental Quality & Safety Regulations (CARB 93120 Phase 2 Compliant).


Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us at 800-447-1001.


Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.

  • Best for viewing
    Lunar & planetary
  • Best for imaging
    Lunar & planetary
  • User level
  • Optical design
  • Optical diameter
  • Focal length
  • Focal ratio
  • Optics type
  • Eyepieces
    Bertele 20.0mm,10.0mm (1.25")
  • Magnification with included eyepieces
    62x, 125x
  • Resolving power
  • Lowest useful magnification
  • Highest useful magnification
  • Highest theoretical magnification
  • Limiting stellar magnitude
  • Optical quality
    Diffraction limited
  • Finder scope
    EZ Finder II
  • Focuser
  • Diagonal degrees
    1.25" 90° Mirror Star
  • Secondary mirror obstruction
  • Secondary mirror obstruction by diameter
  • Secondary mirror obstruction by area
  • Mount type
  • Polar-axis scope
    Not available
  • Tube material
  • Tripod material
  • Length of optical tube
    11.1 in.
  • Weight, optical tube
    3.3 lbs.
  • Weight, mount/tripod
    2.9 lbs.
  • Weight, fully assembled
    6.2 lbs.
  • Additional included accessories
    Other included items are not always the same between a new and a second. Seconds may be older versions of the new product, or may be customer returns where accessory substitutions have been made.
  • Other features
    2nds are covered by Orion's Satisfaction Guarantee
  • Warranty
    One year

Orders received by 1pm Eastern Standard Time for in-stock items ship the same business day. Order received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.

A per-item shipping charge (in addition to the standard shipping and handling charge) applies to this product due to its size and weight. This charge varies based on the shipping method.

Standard Delivery: $0.00
3 Day Delivery: $32.00
2 Day Delivery: $32.00
Next Day Delivery: $44.00


This product is available to ship Standard delivery within the 50 US states, APO/DPO/FPO addresses and US territories/protectorates. Delivery is not available to Canada.

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