Orion StarSeeker IV 127mm GoTo Mak-Cass Telescope

• This 5" diameter GoTo Mak-Cass boasts a super-long 1540mm focal length and f/12.1 focal ratio, for powerful views of the Moon, planets, and deep-sky objects
• Huge GoTo database of over 42,000 objects, and handy built-in Tour mode means you'll enjoy great views on any clear night
• Once aligned, dual optical encoders on both axes of motion allow manual aiming of the telescope without losing GoTo alignment
• After an object is selected, the StarSeeker IV 127mm locates and tracks it automatically so you can relax and enjoy the view
• Includes GoTo hand controller, 23mm (67x) and 10mm (154x) wide-field 60-degree eyepieces, 90-degree diagonal, EZ Finder II sight, and more

Our StarSeeker IV 127mm GoTo Mak-Cass telescope presents a winning combination of motorized object-location technology and great optical performance at an unbelievably low price. This smart GoTo telescope will lead you and your family on a guided tour of the stars on any clear night.

Featuring a compact Maksutov-Cassegrain optical tube with an extra-long 1540mm focal length and f/12.1 focal ratio, the conveniently portable "Grab-and-GoTo" StarSeeker IV 127mm Mak-Cass collects a lot of light with its 5" aperture objective lens for bright views, while its long focal length provides very sharp resolution at high magnifications. The entire telescope setup weighs just 22.2 lbs. for easy transportability.

Following a simple two-star alignment process, the Orion StarSeeker IV 127mm 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 127mm 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.

Limited Warranty against defects in materials or workmanship for one year from date of purchase.

• Best for viewing

  Lunar & bright deep sky
• Best for imaging

  Lunar, planetary & terrestrial
• User level

  Intermediate
• Optical design

  Maksutov-Cassegrain
• Optical diameter

  127mm
• Focal length

  1540mm
• Focal ratio

  f/12.1
• Eyepieces

  3-Element 23.0mm,10.0mm (1.25")
• Magnification with included eyepieces

  67x, 154x
• Resolving power

  0.91arc*sec
• Lowest useful magnification

  18x
• Highest useful magnification

  254x
• Highest theoretical magnification

  254x
• Limiting stellar magnitude

  13.2
• Optical quality

  Diffraction limited
• Finder scope

  EZ Finder II
• Focuser

  Internal
• Diagonal degrees

  1.25" 90ø Mirror Star
• Secondary mirror obstruction

  39mm
• Secondary mirror obstruction by diameter

  31%
• Secondary mirror obstruction by area

  9%
• Mount type

  Altazimuth
• Astro-imaging capability

  Lunar, planetary & terrestrial
• Computerized compatibility

  Go-To system
• Alignment procedure

  Two-Star Alignment
• Number of objects in database

  42,900
• Tracking rates

  Sidereal, Solar and Lunar
• Motor speeds

  Ten different slewing speeds from 0.5x sidereal to over 600x sidereal
• Motor type

  DC Servo motors with encoders
• Power requirement

  8-AA batteries or 12-volt DC
• Available ports

  RS-232
• Tube material

  Aluminum
• Tripod material

  Steel
• Tripod leg diameter

  1.25 in.
• Length of optical tube

  14.5 in.
• Weight, optical tube

  8.6 lbs.
• Weight, mount/tripod

  13.4 lbs.
• Weight, fully assembled

  22.2 lbs.
• Additional included accessories

  Cast-Metal accessory tray/Spread bracer, RS-232 cable, 12V DC power cable, Quick-Collimation cap
• Other features

  Liquid filled compass to aid with alignment, Manual movement while maintaining GoTo alignment, Battery & hand controller holder built into mount
• Warranty

  One year