Orion Observer 134mm Equatorial Reflector Telescope Review: Features a 5.3 Inch Parabolic Mirror

Orion Observer 134mm Overview

The Orion Observer 134mm Equatorial Reflector Telescope is for the beginner astronomer who needs a 134mm aperture for versatile viewing, providing a 650mm focal length for wide-field observation.

Tracking celestial objects across the night sky is difficult when a telescope mount cannot compensate for the Earth’s rotation. Without an equatorial mount, images of deep-sky objects quickly drift out of the field of view, making long-exposure observation frustrating for the user.

The Orion Observer 134mm Equatorial Reflector Telescope provides a solution with its EQ3-class equatorial mount. This specific mounting system allows for smoother tracking of celestial bodies compared to simpler alt-azimuth designs.

We evaluated the Orion Observer 134mm against the other reflector telescope options we compared to determine its value. This review is for the user who prioritizes tracking stability and ease of use over extreme focal lengths.

If you prefer a more compact setup, view our full SkyScanner BL102mm review for a detailed breakdown.

The Short Answer on the Orion Observer 134mm

Best for: you need a portable reflector telescope with an equatorial mount for tracking celestial objects without a large footprint.

The Orion Observer 134mm is a capable choice at $329.99.

• Pro: The 134mm (5.3″) parabolic mirror provides a large aperture for light gathering.
• Pro: The EQ3-class equatorial mount allows for easier tracking of objects as they move across the sky.
• Pro: It includes two 1.25″ Plossl eyepieces for immediate use.
• Con: The 650mm focal length falls short of the 1000mm threshold required for high-magnification planetary observation without extreme chromatic aberration.
• Con: The 5.3″ aperture is smaller than the 8-inch to 10-inch Dobsonian industry standard for high-performance visual astronomy.

Don’t buy this if: you require a telescope with a 1000mm focal length or greater to capture fine detail on planets.

Price assessment: The $329.99 price is fair for an equatorial reflector that includes a mount and multiple eyepieces.

For those seeking a larger aperture, see our review of the Skyline Dobsonian to compare its performance.

You can also compare the best reflector telescope with motor drive options to find the right automated tracking.

Specifications in Full

The EQ3-class equatorial mount allows for tracking celestial objects by rotating on a single axis, which is a primary requirement for stable long-exposure observation.

What These Specifications Let You Do

Parabolic Mirror Optics

The Orion Observer 134mm features a 134mm (5.3″) parabolic mirror and a 650mm focal length. This aperture allows you to resolve large deep-sky objects and lunar details clearly. Because the 650mm focal length falls short of the 1000mm threshold required for high-magnification planetary observation without extreme chromatic aberration, this setup is better suited for wide-field views of nebulae and clusters.

Parabolic mirrors reduce spherical aberration, ensuring the Orion Observer 134mm produces sharper images across the field of view. While the data does not specify the mirror’s tolerance for alignment, reflector owners should check the manufacturer’s maintenance requirements for collimation frequency to ensure the mirror stays centered during use.

EQ3-Class Tracking

The EQ3-class equatorial mount allows you to track celestial objects by rotating on a single axis. This specific mount class provides the necessary tracking for the Orion Observer 134mm to keep objects centered during longer exposures. Because the mount is designed for this specific tube size, you can expect stable tracking that prevents the image from shaking during observation.

Dovetail Mounting System

The dovetail mounting system ensures the Orion Observer 134mm remains securely locked to the mount. This standard interface allows for a stable connection between the optical tube and the tripod, which is necessary to prevent movement during use. A secure mount connection is vital for maintaining image steadiness, especially when using the 25mm or 10mm eyepieces for high-magnification views.

How the Orion Observer 134mm Compares to Alternatives

The Orion Observer 134mm ranks as the 1st cheapest option among the 6 reflector telescopes we evaluated, priced at $329.99.

• The Orion Observer 134mm costs the same price as the 150EQ Equatorial Reflector Telescope and the 150EQ Reflector Telescope.
• The Orion Observer 134mm costs $10 less than the Celestron AstroFi 102 Wi-Fi Maksutov.
• The Orion Observer 134mm costs $20 less than the 150EQ Reflector Telescope priced at $349.99.
• The Orion Observer 134mm costs $30 less than the 130EQ Newtonian Reflector Telescope.
• The 130EQ Newtonian Reflector Telescope has a higher rating of 4.3 compared to the 4.5 rating of the Orion Observer 134mm.
• The 150EQ Reflector Telescope priced at $349.99 holds a higher rating of 5.0 than the Orion Observer 134mm.

The 134mm mirror provides a 5.3″ aperture, which falls short of the 8-inch to 10-inch Dobsonian reference tier used for high-performance deep space observation. If you require the light-gathering power of a larger mirror for faint nebulae, choose the 150EQ Reflector Telescope instead.

Smaller budgets might be better served by examining our HSL Reflector Telescope review for a compact option.

Sometimes a different optical design works better, so explore the alternatives to a reflector telescope for other viewing methods.

Value for Money

The Orion Observer 134mm sits at the $329.99 mark, which is $12 below the $342 average of the similar reflector telescope products we compared. At this price point, you receive a 134mm (5.3″) parabolic mirror and an EQ3-class equatorial mount. You give up the 1000mm focal length threshold required for practical high-magnification planetary observation without extreme chromatic aberration, as this model provides 650mm.

It includes two 1.25″ Plossl eyepieces (25mm and 10mm) and a 6×30 finder scope, providing the necessary components to observe the moon and planets immediately without purchasing additional accessories.

To better understand the technical data, review our reflector telescope terms and specs guide written in plain English.

Orion Observer 134mm Buying Questions Answered

How hard is it to align the equatorial mount on the Orion Observer 134mm?

Aligning the EQ3-class equatorial mount requires manual polar alignment, which can be challenging for beginners to master initially. You should check the included manual for specific polar alignment procedures to ensure the mount tracks celestial objects accurately.

Can I swap out the included eyepieces for higher quality ones later on?

Yes, the Orion Observer 134mm uses standard 1.25″ fittings which are compatible with most aftermarket eyepieces. The 650mm focal length remains compatible with a wide range of standard accessories for future upgrades.

Is the Orion Observer 134mm good for viewing planets?

The Orion Observer 134mm provides a 650mm focal length, which falls short of the 1000mm focal length threshold for high-magnification planetary observation without extreme chromatic aberration. You may find it better suited for observing larger deep-sky objects rather than fine planetary detail.

What is the maximum magnification of the Orion Observer 134mm?

The Orion Observer 134mm provides 65x magnification when using the included 10mm eyepiece. You can achieve higher magnification by swapping in shorter focal length eyepieces that fit the 1.25″ mount.

Where to Buy the Orion Observer 134mm

These retailers sell Reflector Telescope generally – we do not track which of them has this particular model in stock, so check availability and the current price with the retailer before making a trip.

• B&H Photo Video (online only) — professional-grade equipment and expert technical support
• High Point Scientific (online only) — specialist retailer with technical expertise and high-end optics
• Adorama (online only) — wide range of accessories and imaging equipment
• Costco (online and physical stores) — bulk availability of specific popular telescope models
• Amazon (online only) — massive selection of entry-level and mid-range brands
• Walmart (online and physical stores) — accessible physical locations for beginner models

Final Verdict on the Orion Observer 134mm

You need a portable reflector telescope with a stable tracking mount for deep-sky observation and are willing to spend around $329.99. The Orion Observer 134mm is the correct choice for these requirements.

The Orion Observer 134mm ranks highly because it includes a 134mm (5.3″) parabolic mirror and an EQ3-class equatorial mount, which simplifies tracking for consistent imaging.

Skip it if: you require a focal length of 1000mm or more for high-magnification planetary observation, as this model’s 650mm focal length falls short of that specific threshold.

Check the current price on Amazon