Orion SkyQuest XT8i Telescope

The Orion SkyQuest XT8i is a discontinued yet highly regarded 8-inch Dobsonian telescope. It’s celebrated for its excellent optics, intuitive Intelliscope object locator, and the stable Dobsonian mount that makes deep-sky exploration accessible.

Engineered for Discovery

Engineered for performance and ease of use, the XT8i combines a large aperture Dobsonian platform with helpful digital technology. Its design prioritizes optical quality, stability, and straightforward operation for a rewarding experience.
Exploded-view diagram showing the key components of the Orion SkyQuest XT8i telescope.

Explore the Night Sky with Confidence

The SkyQuest XT8i delivers substantial light-gathering power in a user-friendly package. Its 8-inch aperture reveals deep-sky wonders, while the lightweight base and Intelliscope technology simplify the process of exploring the cosmos.
Close-up of the Orion SkyQuest XT8i's 8-inch primary mirror reflecting starlight.

Powerful Light Gathering

The 8-inch primary mirror collects 6.4 times more light than a typical 80mm starter scope, unveiling faint galaxies and nebulae.

The Orion SkyQuest XT8i's lightweight Dobsonian base with the optical tube mounted.

Simple Dobsonian Mount

The intuitive Dobsonian base is stable, easy to move, and allows for smooth, manual slewing across the sky.

The Intelliscope Digital Object Locator keypad mounted on the telescope base.

Intelliscope Digital Locator

The Intelliscope Computerized Object Locator guides you to thousands of celestial objects with a simple button press.

A person carrying the Orion SkyQuest XT8i optical tube under a starry night sky.

Portable 20-lb Optical Tube

A robust yet manageable 20-pound optical tube pairs with a lightweight base for easier transport to dark-sky sites.

A detailed view of the Orion SkyQuest XT8i telescope pointed at a bright star field.

Superb Optical Performance

High-quality optics provide sharp, detailed views of planets, the Moon, and star clusters for memorable observing sessions.

Ideal For

Explore Your Observing Style

Beginner Astronomers

The intuitive Intelliscope locator and stable Dobsonian base make it an excellent choice for those starting their astronomy journey with minimal learning curve.

Deep-Sky Observers

The 8-inch aperture provides enough light-gathering power to see galaxies, nebulae, and clusters, satisfying the curiosity of dedicated amateur observers.

Educational Outreach

Its straightforward operation and impressive views of the Moon and planets make it a fantastic tool for engaging and inspiring interest in the night sky.

Backyard Stargazers

While portable, its 42-pound weight is best managed with a cart. It's ideal for observers with a permanent or semi-permanent setup in a backyard.

Planetary & Lunar Study

The high-quality optics and stable platform allow for detailed lunar and planetary study, making it suitable for those focusing on solar system objects.

Suburban Observing

The robust design and large aperture perform well even under moderately light-polluted skies, offering rewarding views of brighter celestial objects.

Getting Started

Your First Night with the XT8i

Follow these essential steps to assemble, align, and begin observing with your XT8i telescope. Proper setup and care ensure optimal performance and many nights of celestial discovery.
The Orion SkyQuest XT8i telescope base being assembled from its components.

Assemble the Dobsonian Base

Carefully unbox all components and assemble the Dobsonian base per the instructions. Securely mount the optical tube onto the base, ensuring it sits flat and stable.

A view through the collimation cap showing the mirror alignment of the XT8i.

Collimate the Mirrors

Use the included collimation cap to check and adjust the alignment of the primary and secondary mirrors. This is crucial for achieving sharp, high-contrast images of celestial objects.

Hands installing batteries into the Intelliscope keypad of the XT8i.

Power and Align Intelliscope

Install batteries into the Intelliscope keypad. Perform the initial star alignment procedure to calibrate the digital object locator for accurate pointing.

The Orion SkyQuest XT8i telescope with the 25mm eyepiece inserted and aimed at the Moon.

Begin with Low Power

Start with the included 25mm eyepiece for a wide, low-magnification field of view. Locate bright targets like the Moon or planets to familiarize yourself with the telescope's motion.

The Orion SkyQuest XT8i telescope outdoors during twilight, cooling before a night of observing.

Allow for Cool-Down

Allow the telescope to cool down to ambient outdoor temperature for 30-60 minutes. This minimizes internal air currents and ensures the sharpest possible views through the optical tube.

The Orion SkyQuest XT8i telescope fully assembled on a utility cart in a garage.

Transport and Store

For moving the telescope, use a cart or hand truck to transport the fully assembled unit. Store it in a garage or shed to eliminate cool-down time and keep it ready for use.

User Experiences

What Astronomers Say

Hear from astronomers who used the XT8i as their primary instrument for exploring the cosmos. These firsthand accounts detail its performance, durability, and the unique advantages of its Intelliscope system.
The XT8i was my first-choice telescope for years. Its 8-inch aperture gathers incredible light, letting me see far more detail than smaller scopes. The Intelliscope made finding objects effortless.
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Stargazer Dave
The simplicity of the Dobsonian mount makes it perfect for teaching a teen or beginner. You don't need extensive sky knowledge to start observing. Its stability is a huge plus over wobbly entry-level mounts.
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Observant Parent
I consider the XT8i a fantastic value. It excels for both casual viewing and more serious study. The optics are superb, delivering clear, detailed images of planets, clusters, and nebulae.
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Casual Observer
The included 25mm eyepiece provides a wide field for stunning views of open clusters and nebulae. For higher power, the 10mm eyepiece beautifully resolves planetary detail and splits double stars.
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Lunar Enthusiast
Living in a light-polluted area, I focus on bright targets like the Moon, planets, and open clusters. The XT8i handles these brilliantly, making urban astronomy rewarding and practical.
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City Dweller
On exceptionally calm nights, I've pushed the magnification to 300X on Jupiter and over 400X on the Moon. The XT8i's optics and stable mount make these high-power views possible.
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Clear Night Seeker

Practical Answers for the XT8i

Get answers to common questions about the Orion SkyQuest XT8i’s design, operation, and maintenance. Understanding these details helps ensure a smooth and rewarding experience as you begin your astronomical journey.
The total weight of the Orion SkyQuest XT8i package is approximately 42 pounds. The optical tube weighs 20 pounds, and the Dobsonian base adds 21 pounds. This makes it portable enough to transport to observing sites, though a hand truck is recommended for moving it fully assembled.
The Orion SkyQuest XT8i typically included two eyepieces (a 25mm and a 10mm), an Intelliscope Digital Object Locator, a RACI finder scope, a collimation cap, and the necessary hex wrench for alignment. Check the original product listing for any specific bundle inclusions.
The telescope’s optical tube and Dobsonian mount are entirely manual and require no power for basic stargazing. However, the Intelliscope Digital Object Locator requires batteries to operate its computerized pointing assistance feature.
The Intelliscope system uses standard AA batteries. Battery life varies with usage but typically lasts for many observing sessions. It’s a good practice to carry spare batteries for extended nights under the stars.
Regular collimation—aligning the mirrors—is important for optimal optical performance. The XT8i holds its alignment well, but checking it periodically ensures sharp, high-contrast views. The provided tools make this a quick and simple process.
The XT8i was equipped with a RACI (Right Ascension and Declination) finder scope. This 8×50 finder displays a mirror-reversed view that matches star charts, making manual star-hopping intuitive, especially in light-polluted skies.
The Orion SkyQuest XT8i telescope with its included eyepieces and collimation tools laid out nearby.
An astronomer adjusting the collimation on the Orion SkyQuest XT8i telescope using the provided cap.
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