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Orion Telescopes
Orion 36" Monster Dobsonian Telescope
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  • Monstrous 36" aperture parabolic primary mirror (914mm) collects over 1000 square inches of light - four times the light of ordinary 18" telescopes!
  • Low-expansion borosilicate glass molded in a honeycomb mirror blank design make it exceptionally strong, yet light, and assures good optical performance, even as the temperature drops
  • Complete tracking and GoTo capability makes this Monster easy to tame - finding objects is a breeze
  • Premium quality f/4 optical system gives a whopping 144" (3658mm) focal length to deliver exceptionally sharp, bright images with generous image scale
  • Constructed from aluminum and aluminum/Russian Birch composite structures; the entire system weighs less than 400 pounds with the heaviest component being the primary mirror (~ 150 lbs)

Learn more
Item #  09160

Many years ago, you bought your first telescope ? perhaps it was an inexpensive beginner 60mm refractor. You saw craters on our moon, gazed at the moons of Jupiter, the rings of Saturn and a couple of bright star clusters. You were hooked!

So you moved on to your first ?real? telescope ? a 6" reflector. You enjoyed new vistas: real detail on Mars and Jupiter. Messier objects and brighter stars came into view. Then you came down with a bad case of aperture fever.

Now, your latest "big" reflector reveals details and structure in many NGC objects. You may have even discovered some of the brightest anonymous galaxies. As your experience and passion for observing the deep sky grew, your aperture fever progressed to a real compulsion.

Orion finally has the cure for what ails you.

Introducing our huge 36" diameter "Monster Dobsonian."

Monster Dob Chart

Huge light-gathering power and premium quality optics are the centerpieces of these "Monsters". Imagine the observing possibilities! The Rings?s central star is right there! The NGC objects are mostly easy targets. Everything is more detailed ? you?ll really see the spiral arms in NGC 3893, 7479, or 2903. Old favorites like NGC 253 or M101 will amaze you. Anonymous galaxies from Uranometria are nearly always found. From a dark sky location, you?ll be able to see deep-sky objects others can only dream about.*

For telescopes, it really is true that "bigger is better", especially if your passion is deep-sky observing. The Orion 36 collects four times as much light as an 18" telescope, nine times the light grasp of a 12", or nearly 13 times more light than a 10" telescope. With 36" of aperture, for example, the limited stellar magnitude is approximately +16.8, so the bigger globular clusters in the Andromeda can be easily identified (you can see the brighter ones with a smaller scope). Details in brighter objects invisible through smaller scopes reveal themselves ? like the outer ring around M57 (using an OIII filter under clear, dark skies).

This Monster is big ? it?s a huge light bucket for serious deep-sky enthusiasts only. The Orion 36 gulps over 1000 square inches of light at a time and weighs in at just under 400 pounds. Still our 36" Monster Dob can be disassembled for transport to your favorite dark sky locales. At home, it uses removable wheels to get it outside and back from your garage or storage shed (we hope you have at least a two-car garage! This Monster Dob takes up an entire parking space when assembled).

The fast f/ratio of f/4 produces an impressive 144" of focal length. The hand-figured optical system starts with a honeycomb low-expansion glass mirror blank, which allows fast cool-down and maintenance of thermal equilibrium. This maintains great image quality all night long at the eyepiece, which will be a little over 12 feet above ground at zenith. You?ll need a good ladder!

The Premium Optics have a quality that will match or surpass any commercial Dobsonian on this or any other planet ? 1/8 wave or better, diffraction limited, star-tested optics, razor sharp and hand figured in North America by Master Optician Normand Fullum.

The huge mirror uses a sturdy eight-point wiffle-tree edge flotation system ? not an inflexible band - to support the edge of the primary mirror, which is supported by a 27-point flotation mirror cell. Primary and secondary mirror coatings are 96% enhanced aluminum (dielectric coatings available as an option on the secondary) which make the most of the monstrous light grasp.

The sleek Dobsonian Mount is lightweight but strong and stiff. The rocker box, Azimuth bearings, and ground board are constructed of premium furniture-quality Russian Birch and laminated with aluminum plate to make a super strong, yet lightweight composite structure. The hardware is stainless steel and the struts are strong and light carbon graphite.

ServoCAT Tracking and GoTo and Argo-Navis digital settings circles that automatically locate and track more than 29,000 targets are standard. If you ever run out of these targets, the GoTo system can be run from a laptop planetarium program.

Simply put, the Orion Monster Dobsonians are among the largest telescopes ever offered to the amateur community. The premium optics and light-gathering of telescopes found in observatories and universities are now brought to your home by Orion. Even at nearly 400 pounds, they?re still transportable.

These are truly ?dream? telescopes ? the Monster 36" Dobsonian from Orion. For visual astronomers, it is the ultimate observing experience. With it, you?ll never run out of interesting targets in the night sky.

But what you will see is the stuff of dreams.


This telescope is designed for visual use, but photography would be possible with the addition of a field de-rotator and autoguiding solutions (not included).

Digital electronics are FCC Class B, CE Class B certified and fully RoHS compliant.

Don?t point a Monster Dob at the sun! Just pointing this at the sun can instantly damage eyepieces and cause irreversible eye damage and burns. Use extreme caution leaving it uncovered during daylight. Concentrated sunlight from this much aperture can damage the telescope or set its surroundings on fire!

Moonlite, Argo-Navis, and ServoCAT are trademarks of their respective companies.

Ordering Information:
Due to the exclusive nature of these telescopes, a purchase contract is required and will be supplied by an Orion Sales Representative that will be your personal contact throughout the sales, building, delivery, installation and use of your custom-built telescope. Once your order is received you will be contacted by your Orion representative.

A 75% down payment will be required to place your order. Although a credit card number is taken at the time you enter your order information online, your credit card is not charged. A wire transfer of the deposit will be required prior to beginning to build your telescope. Final payment by wire transfer will be required prior to shipping.

The estimated expected shipping date is displayed, but this is only an estimate. As this is a custom built product the actual shipping date may vary.

This product will ship directly from the North American factory. Shipping is arranged by Orion, usually by air freight and in consultation with the customer. The Customer is responsible for all shipping, insurance, brokerage fees, duties and taxes.

The customer is also responsible for arranging for needed material handling equipment at the delivery site (for example, the crated 36" mirror will weigh about 300 lbs ? you?ll want a forklift or a whole bunch of friends!).

Some customization options and installation services are available at an additional expense. Your personal Orion Sales Representative can provide additional information.

* For a small selection of galaxy drawings through 30 and 36" telescopes, see appendix six of the the Webb Society Deep-Sky Observer?s Handbook, Volume 4: Galaxies.


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.

  • Best for viewing
    Fainter deep sky
  • Best for imaging
    Lunar & planetary
  • User level
  • Optical design
  • Optical diameter
  • Focal length
  • Focal ratio
  • Optics type
  • Glass material
    Low thermal expansion borosilicate glass
  • Resolving power
  • Lowest useful magnification
  • Highest useful magnification
  • Limiting stellar magnitude
  • Optical quality
    Diffraction limited
  • Finder scope
    Reflex sight
  • Focuser
    2" dual-speed Crayford
  • 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
  • Motor drive compatibility
    Clock drive included
  • Computerized compatibility
    Go-To included
  • Alignment procedure
    2-star alignment
  • Number of objects in database
  • Tracking rates
  • Bearing material
    Ebony Star/PTFE
  • Power requirement
    12-volt DC (tip positive)
  • Setting circles
    Electronic, via the hand controller
  • Available ports
  • Tube material
    Carbon graphite
  • Tripod material
    17-layer Russian Birch & aluminum bonded composite
  • Length of optical tube
    140.0 in.
  • Weight, fully assembled
    375.0 lbs.
  • Additional included accessories
    5 cooling accelerator fans, Argo-Navis digital setting circles
  • Other features
    27 point floatation mirror cell, Carbon fiber struts, Engineered honeycomb primary mirror
  • Warranty
    One year

Orion 36 f/4.0 Truss-Tube GoTo Dobsonian Telescope w/parabolic primary mirror made of low-expansion borosilicate glass
Premium hand-figured optics by Normand Fullum
27-point flotation primary mirror cell with collimation adjustments
Secondary mirror features spring loaded collimation adjustments
6 carbon graphite collapsible truss tubes with Moonlite(TM)* truss-tube connections
Dual-Speed 2" Moonlite(TM)* Crayford focuser w/1.25" telescope eyepiece adapter and adjustable focusing tension
Orion EZ Finder Deluxe Telescope Reflex Sight
Unique low-mass/high rigidity compact Dobsonian mount fabricated from CNC machined, 17-layer Russian Birch & aluminum plate epoxy bonded composite material
Ebony Star and UHMW bearings
Argo-Navis(TM)* electronic setting circles with over 29,000 astronomical objects in the on-board database
ServoCAT(TM)* tracking and GoTo system; can be controlled from most popular planetarium programs for robotic telescope control
5 cooling accelerator fans located in mirror box
Collapsible secondary cage light shield
Lens/dust cap
Orion Dynamo Pro 12V Rechargable Power Station
Starry Night Special Edition software

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.


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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