Take a guided tour of the cosmos without leaving the comfort of your own backyard!
The self-pointing Orion StarSeeker III 90mm GoTo Maksutov-Cassegrain Telescope will show you and your family interesting celestial sights on any clear night. Its compact 90mm Maksutov-Cassegrain optical tube assembly makes it the most portable member of the StarSeeker III family of GoTo telescopes. What's more, the StarSeeker III 90mm features a smaller altazimuth mount than its brethren for easy transport. The most portable StarSeeker III boasts a long 1250mm focal length and f/13.9 focal ratio for exceptional high-power performance.
An excellent choice for intrepid beginning amateur astronomers, the user-friendly, fully computerized StarSeeker III 90mm GoTo telescope provides electronic, motorized navigation to all the finest celestial objects. StarSeeker III models boast an upgraded computerized database of over 42,000 celestial objects to explore. Once the GoTo system locates a selected object, the StarSeeker III 90mm Mak-Cass will precisely track it as it appears to move across the night sky, so you can enjoy the view for as long as you like before selecting a different target. This allows you to relax and enjoy the view instead of fumbling with cables and buttons to keep the object centered.
Lightweight at just 10.7 lbs. when fully assembled, the easily portable StarSeeker III 90mm GoTo Maksutov-Cassegrain packs a big performance punch in its small telescope tube. Maksutov-Cassegrain telescopes employ both mirrors and lenses to "fold" the light path, which keeps them conveniently compact in size, but with the high magnifying abilities of much longer refractor or reflector models. This gives the StarSeeker III 90mm Mak-Cass a winning combination of easy portability and powerful optics. What's more, the included single-arm GoTo altazimuth mount can be set-up and taken down quickly, and features a quick-release dovetail saddle for swift telescope attachment without the need for tools.
Following an easy two-star alignment process, the StarSeeker III 90mm GoTo can take you on a guided tour of the best visible objects in the night sky. Once aligned, this smart telescope will find and aim itself at any visible planet or Messier, NGC, or IC catalog object in seconds with just a few button pushes. Built-in encoders and servo motors slew the telescope accurately and automatically right to the object you select from the GoTo hand controller's intuitive menus. With a vast database of over 42,000 celestial objects, the StarSeeker III 90mm GoTo Mak-Cass will show you interesting sights on any clear night.
Since the StarSeeker III 90mm Mak-Cass can locate and track celestial objects with its motorized GoTo system, you can use it along with a camera or smartphone to take impressive pictures of the night sky. Capture stunning snapshots of the Moon, planets and more by attaching a dedicated astrophotography camera, or a combination of an Orion SteadyPix accessory and your own point-and-shoot camera or smartphone to the StarSeeker III 90mm Mak-Cass to explore the rewarding hobby of astrophotography. (Cameras and SteadyPix accessories sold separately.)
You'll get a great assortment of useful accessories with the StarSeeker III 90mm GoTo Maksutov-Cassegrain telescope:
Two 1.25" eyepieces are included with the StarSeeker 90mm GoTo Mak-Cass.
The included 25mm Explorer II eyepiece provides 50x magnification in the 90mm Maksutov-Cassegrain optical tube, and the 10mm yields 125x for higher-power looks through the telescope. We recommend starting with the 25mm eyepiece every night to observe a wider area of the night sky, then boost magnification by swapping out the 25mm eyepiece with the 10mm ocular once you have an object centered.
Use the included 90° star diagonal to view the night sky comfortably
A diagonal "bends" the light path of a telescope so you can enjoy the view without having to contort yourself into awkward positions to peer into the eyepiece. The 90° star diagonal that comes with the StarSeeker 90mm GoTo Mak-Cass places the eyepiece you're using in a comfortable position for nighttime stargazing of the skies above.
The Orion EZ Finder II reflex sight makes it "EZ" to center alignment stars.
Use the included EZ Finder II reflex sight to help center initial alignment stars when performing the two-star alignment required for accurate GoTo performance. It's a non-magnifying sighting device that superimposes a tiny, LED-powered red dot, focused at infinity, on the sky. After a simple alignment procedure, the red dot shows exactly where your telescope is pointed.
Let the computerized GoTo controller guide you on a tour.
The StarSeeker III 90mm GoTo Mak-Cass lets you explore the skies with pushbutton ease thanks to its GoTo hand controller. With a vast database of over 42,000 celestial objects including stars, double stars, galaxies, nebulas, star clusters, and more, the included computerized GoTo hand controller will become your tour guide to the skies.
The StarSeeker III 90mm GoTo Mak-Cass also includes a compass, PC interface cable, and a removable accessory tray for the tripod. Each StarSeeker III requires 8 AA batteries (not included) or an external 12V DC field battery or AC-to-DC wall adapter.
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 800-676-1343.
Visit our product support section for instruction manuals and more
Orion StarSeeker III 90mm Mak-Cass OTA
StarSeeker III mount and tripod
GoTo hand controller
Orion EZ Finder II reflex sight
25mm Explorer II telescope eyepiece, 1.25"
10mm Explorer II telescope eyepiece, 1.25"
90-degree star diagonal
Liquid-filled compass to aid in GoTo alignment
PC interface (serial) cable
Hand controller holder
Battery holder for 8 AA batteries (batteries not included)
Starry Night digital download insert