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Orion Telescopes
Orion XT4.5 Dobsonian Telescope & Beginner Barlow Kit
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  • 114mm (4.5") aperture and 900mm focal length Dobsonian telescope provides great views of lunar craters, planets, bright nebulas and galaxies
  • Includes the Orion Beginner Barlow Kit - A great value on two of our most popular items for novice backyard astronomers
  • Included Orion 2x Shorty Barlow Lens doubles the magnification of virtually any 1.25" eyepiece, adding magnification options to your telescope right out of the box
  • The included Beginning Stargazers Toolkit provides plentiful reference material for nighttime observing and a handy red LED light to see them with
  • An affordable and value-packed telescope and accessory kit perfect for beginning astronomers!

Learn more
Item #  27159

Our SkyQuest XT4.5 is a quality telescope, with point-and-view simplicity that makes it easy to use and makes stargazing fun! The optical performance is far and away better than flimsy department store models. Its 4.5" (114mm) mirror, housed in an enameled steel tube, gathers 260% more starlight than a 60mm refractor. More light means you can see a lot more celestial objects in greater detail. In a review of low-cost beginner telescopes, Sky and Telescope (12/05) proclaimed the XT4.5 "The best of the bunch - a solid combination of optics and mechanics." Try it and see for yourself!

Classic Dob Chart

This bundle includes the crowd-pleasing Orion XT4.5 Classic Dobsonian and our Orion Beginner Barlow Kit for powerful performance! The included Beginner Barlow Kit is a great combination of accessories for anyone beginning a hobby of amateur astronomy and includes the powerful Orion Shorty 2x Barlow Lens, as well as the useful Orion Beginning Stargazers Toolkit.

A 2-power (2x) Barlow lens is an extremely versatile eyepiece accessory that doubles the magnification of any eyepiece installed. For example, when used with the XT4.5 Classic Dobsonian telescope with its 910mm focal length, using a 10mm eyepiece will yield a view with 91-power magnification. If you installed the same 10mm eyepiece into the Shorty 2x Barlow Lens and used the same XT4.5 Dobsonian telescope, your viewing magnification would be increased to 182-power magnification (91 x 2). Barlows are great eyepiece accessories for beginning astronomers since they allow you to double the power of the eyepieces included with your telescope. They are a great and affordable way to add to your arsenal of viewing magnifications. What?s more, the Orion Shorty 2x Barlow gets it?s "Shorty" moniker from its compact size compared to other Barlow lenses, so it?s easier to find a spot for it when packing your gear for a night under the stars.

With the included Orion Beginning Stargazer?s Toolkit, you?ll never be "lost in space!" It contains four items designed to help new astronomers find their way around the heavens.

  1. Star Target Planisphere - Dial in your local date and time and it shows you the locations of the constellations and deep-sky objects in the night sky
  2. Discover the Stars - A wonderfully written and illustrated observer?s guide
  3. Moon Map - Identify craters and other lunar features with your telescope. The correct-image Moon Map is oriented to match the Moon as it appears to the unaided eye. Turning the map may be required to match the view seen in your telescope.
  4. Orion RedBeam Mini LED Astro Flashlight - Emits pure red light that won?t spoil your night vision. Perfect for reading your planisphere or seeing what you?re doing at the telescope


Media Buzz

Sky & Telescope Magazine ? December 2005
"When it comes to raw performance, the Orion XT4.5 Dobsonian and StarBlast were the hands-down winners. Both provided brighter, more detailed views than the other scopes.

"The best of the bunch ? solid combination of optics and mechanics.

"The Orion XT4.5 had the best finder [scope] ? a nice 6x26 noninverting finder mounted in a superb spring-loaded bracket."

Astronomy Magazine ? May 2003
"This little Dob can ?dig deep.? .... The XT4.5 is an ideal beginner?s scope for the upcoming astronomer,...."

Sky & Telescope Magazine ? April 2001
"Tough-as-nails design .... well-designed optical system and quality accessories. The Orion Nebula showed lots of texture .... Lots of star groupings showed up crisply in the Double Cluster .... On Jupiter, we could see the Great Red Spot .... Saturn showed four moons, the Cassini Division .... and subtle zones on the globe.

"For those seeking that mythical ideal first telescope, your search may be over .... The SkyQuest [XT4.5] has set a new standard for the beginner?s telescope."


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.


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
  • Finder scope lens diameter
  • Focal length
  • Focal ratio
  • Optics type
  • Glass material
    Soda-lime plate
  • Eyepieces
    Sirius Plossl 25.0mm, 10.0mm
  • Magnification with included eyepieces
    36x, 91x
  • Resolving power
  • Lowest useful magnification
  • Highest useful magnification
  • Highest theoretical magnification
  • Limiting stellar magnitude
  • Optical quality
    Diffraction limited
  • Finder scope
    6x26 Correct-image
  • Focuser
    1.25" Rack-and-pinion
  • Secondary mirror obstruction
  • Secondary mirror obstruction by diameter
  • Secondary mirror obstruction by area
  • Mirror coatings/over-coatings
    Aluminum & Silicon Dioxide
  • Mount type
  • Astro-imaging capability
    Simple moon shots
  • Computerized compatibility
    Not compatible
  • Bearing material
    Teflon and UHMW bearings
  • Tube material
  • Tripod material
  • Length of optical tube
    35.0 in.
  • Weight, fully assembled
    17.6 lbs.
  • Additional included accessories
    Collimation cap, Eyepiece rack
  • Other features
    CorrecTension system, Navigation knob, Integral carry handle
  • Warranty
    One year

Orion SkyQuest XT4.5 Dobsonian reflector telescope optical tube assembly
25mm Orion Sirius Plossl telescope eyepiece (1.25")
10mm Orion Sirius Plossl telescope eyepiece (1.25")
Orion 6x26 correct-image finder scope
Finder scope bracket with O-ring
Collimation cap
Telescope eyepiece rack
Dust cap
Left panel
Right panel
Front brace
Top base plate
Ground base plate
Base assembly screws
Trip caps (black)
Plastic feet
Feet attachment wood screws (length 3/4")
Self-adhesive rubber bumper
Large hex-head bolt (length 2")
3/8-inch washers
3/8-inch lock nut
Nylon spacer (white)
Spring coils
Pull loops
Nylon spacers
1/4-inch washers
Phillips-head screws
Starry Night special edition software
Orion 1.25" Shorty 2x Barlow Lens
Orion Star Target Planisphere
Discover The Stars book
Folding Moon Map
Orion RedBeam Mini LED keychain flashlight

Orders received by noon Pacific Time for in-stock items ship the same business day. Orders 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 Air Delivery: $164.00
2 Day Delivery: $164.00
Next Day Delivery: $213.00

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