HACKER SAFE certified sites prevent over 99.9% of hacker crime.

{"closeOnBackgroundClick":true,"bindings":{"bind0":{"fn":"function(){$.fnProxy(arguments,\'#headerOverlay\',,\'\');}","type":"quicklookselected","element":".ql-thumbnail .Quicklook .trigger"}},"effectOnShowSpeed":"1200","dragByBody":false,"dragByHandle":true,"effectOnHide":"fade","effectOnShow":"fade","cssSelector":"ql-thumbnail","effectOnHideSpeed":"1200","allowOffScreenOverlay":false,"effectOnShowOptions":"{}","effectOnHideOptions":"{}","widgetClass":"OverlayWidget","captureClicks":true,"onScreenPadding":10}

 30 of 53 
Orion Telescopes
Orion StarSeeker IV 150mm GoTo Mak-Cass Explorer Kit
3 easy payments of $433.33
With payment plan
Accepted Payment
In Stock
  • Complete GoTo telescope packed with lots of useful extra accessories
  • Powerful 150mm-aperture Maksutov-Cassegrain telescope provides amazing views
  • Computerized GoTo system locates and tracks over 42,000 celestial objects for you to explore
  • Includes GoTo hand controller, 23mm (78x) and 10mm (180x) wide field 60-degree eyepieces, 90-degree diagonal, 2" visual-back, EZ Finder II sight, and more
  • Value-packed Explorer Kit includes a padded telescope case, SteadyPix EZ smartphone adapter, Moon filter, Shorty 2x Barlow, Beginning Stargazer's Toolkit, Planetary Observing Guide Kit, and more

Learn more
Item #  27302

This deluxe Explorer Kit includes the complete StarSeeker IV 150mm GoTo Maksutov-Cassegrain Telescope and a large assortment of useful extra accessories. 

Our biggest Maksutov-Cassegrain StarSeeker IV GoTo telescope combines motorized object-location technology with high-power optical performance at a great price. With its computerized database of over 42,000 celestial objects to explore, this smart GoTo telescope will lead you and your family on a guided tour of the stars on any clear night.

Featuring a compact, yet large-aperture Maksutov-Cassegrain optical tube with an extra-long 1800mm focal length and f/12 focal ratio, the StarSeeker IV 150mm Mak-Cass collects a ton of light with its big 5.9" objective lens for bright views. Thanks to its combination of substantial aperture and long focal length, this telescope yields super-sharp resolution at high magnifications, making it an ideal instrument for high-power views of objects in the night sky. You'll be amazed by the exceptional amount of detail this telescope delivers when observing the Moon's cratered surface, and by its ability to reveal subtle features on planets like Jupiter, Saturn and Mars. Deep-sky objects such as nebulas, star clusters, and brighter galaxies are also well within range of this compact power-performer.

Following a simple two-star alignment process, the Orion StarSeeker IV 150mm telescope can guide you to interesting sights on any clear night with its GoTo database of over 42,000 objects. A handy, built-in "Tour" mode feature of the included GoTo hand controller makes it easy for anyone to explore the wonders of starry skies, no matter how familiar or unfamiliar you are with the night sky. Once the StarSeeker IV 150mm GoTo Mak-Cass locates a target for you to explore, the single-arm altazimuth mount's internal motors will automatically track the object's apparent motion and keep it centered so you can enjoy the view as long as you wish. This fourth generation StarSeeker telescope features dual optical encoders on each axis of motion which allow you to move the telescope tube either manually by hand, or electronically by using the directional arrows on the GoTo hand controller. To save time, battery life, and reduce motor wear, you can manually point the telescope towards the general area of a target object, then engage the tube lock and use the hand controller to let the GoTo mount finish the fine-centering of the object electronically.

This complete GoTo telescope setup includes a large assortment of useful extra accessories. You can easily take smartphone snapshots of the view through the 150mm Mak-Cass telescope with the included SteadyPix EZ Smartphone Telescope Photo Adapter. The included Shorty 2x Barlow lens doubles the power of any 1.25" eyepiece to boost magnification. An included 13% Neutral-Density Moon Filter will improve the contrast of your Moon observations and reduce glare. The Beginning Stargazer's toolkit comes with four useful tools for all stargazers: the Orion Telescope Observer's Guide book, Orion MoonMap 260, Orion Star Target planisphere, and the handy RedBeam Mini LED flashlight. Use the three guides in the Planetary Observing Guide Kit to enhance your observations of bright planets Mars, Jupiter and Saturn. The included 43"x9"x11" Orion Padded Telescope Case will keep the StarSeeker IV 150mm Mak-Cass clean and safe during transport.


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.

Product Support
Visit our product support section for instruction manuals and more
  • Best for viewing
    Brighter deep sky
  • Best for imaging
    Lunar & planetary
  • User level
  • Optical design
  • Optical diameter
  • Focal length
  • Focal ratio
  • Eyepieces
    3-Element 23.0mm,10.0mm (1.25")
  • Magnification with included eyepieces
    78x, 180x
  • 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
  • Astro-imaging capability
    Lunar & planetary
  • Computerized compatibility
    Go-To included
  • Alignment procedure
    Two-Star Alignment
  • Number of objects in database
  • Tracking rates
    Sidereal, Solar and Lunar
  • Motor speeds
    Ten different slewing speeds from 0.5x sidereal to over 600x sidereal
  • Power requirement
    8-AA batteries or 12-volt DC
  • Tube material
  • Tripod material
  • Tripod leg diameter
    1.25 in.
  • Length of optical tube
    17.7 in.
  • Weight, optical tube
    12.1 lbs.
  • Weight, fully assembled
    26.1 lbs.
  • Additional included accessories
    2" visual back accepts 2" or 1.25" accessories, Front dust cover, Dovetail mounting rail
  • Other features
    Dual encoders on each axis allow manual GoTo, INternet upgradeable hand controller, Internal battery compartment
  • Warranty
    One year

Orion StarSeeker IV 150mm GoTo Mak-Cass Telescope
Orion SteadyPix EZ Smartphone Telescope Photo Adapter
Orion Shorty 1.25" 2x Barlow Lens
1.25" Orion 13% Transmission Moon Filter
Orion Telescope Observer's Guide
Orion Star Target Planisphere, 30-50 degree
Orion MoonMap 260
Orion RedBeam Mini LED Flashlight
Orion Mars Map and Observing Guide
Orion Jupiter Map and Observing Guide
Orion Saturn Map and Observing Guide
43"x9"x11" Orion Padded Telescope Case

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
Standard Delivery to Canada: $60.00
3 Day Delivery: $124.00
2 Day Delivery: $124.00
Next Day Delivery: $151.00

{"closeOnBackgroundClick":true,"bindings":{"bind1":{"fn":"function(event, startIndex, itemCount, newItems) { QuickLookWidget.assignEvents(newItems); $(\".Quicklook > .trigger\", newItems).bind(\"quicklookselected\", function(event, source, x, y) {\'#_widget1912302329098\', event, source, x, y); }); }","type":"itemsloaded","element":".PagedDataSetFilmstripLoader > .trigger"},"bind0":{"fn":"function(){$.fnProxy(arguments,\'#_widget1912302329098\',,\'\');}","type":"quicklookselected","element":".Quicklook > .trigger"}},"effectOnShowSpeed":"","dragByBody":false,"dragByHandle":true,"effectOnHide":"fade","effectOnShow":"fade","cssSelector":"ql-category","effectOnHideSpeed":"1200","allowOffScreenOverlay":false,"effectOnShowOptions":"{}","effectOnHideOptions":"{}","widgetClass":"OverlayWidget","captureClicks":true,"onScreenPadding":10}