The Best 2 Inch Telescope Eyepieces For 2023

Holly Becker By, Holly Becker
Explore Scientific 82° 30mm Eyepiece 2-inch Barrel
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1. Best Overall: Explore Scientific 82° 30mm Eyepiece 2-inch Barrel

The Explorer 82° 30mm Eyepiece 2" Barrel is an excellent choice for a wide variety of standard and compound refractors. The eyepiece has an 82° field of view, a magnification power of 30mm and a water-resistant Argon purge that allows you to safely observe through this great piece of equipment. Read Review

2. Best For The Price: Celestron 93573 Dielectric Star Diagonal 2" with Twist Lock

Enjoy better views through your telescope with this premium diagonal featuring diffraction-limited optics and dielectric coatings. The Celestron Dielectric Star Diagonal provides a 90° viewing angle, perfect for more comfortable viewing through a refractor or a cassegrain-type telescope. With 58 layers of dielectric coatings that provide an over 99% reflective surface, you get the best possible image quality even at high power levels. Read Review

3. Best Easy To Use: Orion 5124 2-Inch Telescope Eyepiece Extension Tube

The Orion 5124 2-Inch Telescope Eyepiece Extension Tube is a great accessory for any telescope. This is a 2" extension tube that allows you to attach your telescope's 2" focuser or accessories. You can also use the included 2" eyepiece and astrophotography filters. The tube has two locking thumbscrews to secure any inserted astronomy accessory, and has a threaded hole at one end for use with 2" Orion eyepiece eyepieces. Read Review

4. Best Design: Orion 8762 2-Inch 2x Barlow Lens

Orion 8762 2-Inch 2x Barlow Lens - Threaded for use with 2" filters, Requires 54mm (2 1/8") additional back focus, Features 30mm clear aperture. This is a high quality barlow lens made for the Orion Starshoot 8 telescope. Read Review

Today’s telescopes come with many eyepieces, and it can be very difficult to choose which one to get. If you own an optical telescope, chances are that you have more than one of them. The number of different types of telescope eyepieces available is so great that they can be broken down into two major subcategories: standard and high power.

Although most telescope users will never use a high-power eyepiece as their go-to accessory, they are ideal for anyone who owns a refractor or Schmidt-Cassegrain telescope that has a magnification range from x10 to x100. Therefore, in this article we will be looking at two different types of 2-inch telescope eyepieces - the best 2 inch telescope eyepieces for beginners and those for intermediate or advanced users.

We think the product that comes highly recommended for the best 2 inch telescope eyepieces is Explore Scientific 82° 30mm Eyepiece 2-inch Barrel. In case you need more alternatives and more in-depth guidance, you may explore the following.

Our Top Picks

TOP Choice #1 Explore Scientific 82° 30mm Eyepiece 2-inch Barrel
Our Score:
Explore Scientific
  • Waterproof Argon Purge
  • 2" Barrel
TOP Choice #2 Celestron 93573 Dielectric Star Diagonal 2" with Twist Lock
Our Score:
  • Twist-lock keeps the eyepiece centered in the diagonal to provide better optical alignment
  • Includes a Stepdown adapter, so the diagonal accepts eyepieces, Barlow lenses, threaded filters, and other accessories in both 2” and 1. 25” sizes
  • 58 layers of dielectric coatings provide an over 99% reflective surface, ensuring the maximum amount of light collected by the telescope reaches the eyepiece
  • Enjoy better views through your telescope with this premium diagonal featuring diffraction-limited optics and dielectric coatings
  • Provides a 90° viewing angle, perfect for more comfortable viewing through refractor and cass grain-type telescopes
TOP Choice #3 Orion 5124 2-Inch Telescope Eyepiece Extension Tube
Our Score:
  • Threaded for use with 2" Orion eyepiece and astrophotography filters
  • Extension tube provides extra focuser "back travel" often needed for short-range terrestrial viewing through a telescope, or for astrophotographic applications
  • Machined and anodized aluminum tube
  • Features two locking thumbscrews to secure any inserted astronomy accessory
  • Adds 2" of extension, fits in 2" telescope focusers, and accepts 2" eyepieces or accessories
  • Increase the power of any 2" eyepiece by a factor of 2x - for example: makes a 30mm eyepiece perform like a 15mm eyepiece
  • Features 30mm clear aperture
  • Threaded for use with 2" filters
  • Requires 54mm (2 1/8") additional back focus
  • Beautifully made with machined housings, fold-down rubber eyeguards, and barrels threaded for use with 2" Orion eyepiece filters
  • Five multi-coated lens elements made of high index glass deliver sharp, high contrast vistas
  • Luxurious eye relief and parfocal design provide comfort and convenience
  • Super-wide 70 apparent field of view gives you that unforgettable lost in space feeling
  • High quality 2" 38mm super-wide angle telescope eyepiece at an unbeatable price
6 Celestron Omni 56mm Eyepiece - 2"
Our Score:
  • 4-element Plössl design provides sharp views to the edge of the 47° apparent field of view
  • Comfortable eye relief (52mm) and fold-down rubber eyeguard for comfortable viewing with or without eyeglasses
  • Fully multi-coated for best light transmission through the lenses, resulting in brighter images
  • Ultra-long 56mm focal length provides low power views in telescopes with a long focal length, perfect for viewing wide-field deep sky objects or daytime terrestrial vistas
  • Knurled rubber grip ring for non-slip handling during observing sessions
  • 2" Barrel
  • 82 degree Apparent FOV,
  • 19mm Eye Relief,
  • 6 Elements
  • Field Stop of 42 mm
  • Buy this set of all three Orion Q70 2" eyepieces - 26mm, 32mm, and 38mm - and save!
  • Super-wide 70deg apparent field of view gives you that unforgettable lost in space feeling
  • Each Q70 telescope eyepiece consists of five multi-coated lens elements made of high index glass to deliver sharp, high contrast vistas
  • Luxurious eye relief and parfocal design provide comfort and convenience
  • Each Q70 eyepiece is threaded for use with 2" Orion filters
  • BUILT-IN ADAPTER-MOUNTING SCREW When the rotatable eyecup is removed it also offers an adapter-mounting screw/thread (43mm in diameter with a 0 75mm pitch)
  • ADVANCED LIGHT-SHIELDING TECHNOLOGY Thanks to PENTAX’s advanced computer simulation technology XW30-R features a light-shielding diaphragm at the most effective position to drastically reduce internal reflections for a brighter higher-contrast image
  • PENTAX SPORTS OPTICS SINCE 1938 Bringing together technology cultivated through the development of a wide variety of cameras and lenses Experience the clarity made possible by trusted optical performance and revolutionary coating techniques Discover a new way of seeing with PENTAX sports optics
  • SMC COATING All lens surfaces that come in contact with air are treated with the original multi-layer coating while all laminated surfaces are treated with the innovative partial coating to offer the light transmission efficiency of more than 90 percent (an astonishing 96 percent at 550nm) over the visible light spectrum
  • HIGH-GRADE OPTICS FOR EXCEPTIONAL IMAGE QUALITY The high-performance XW30-R's optics incorporates high-refraction extra-low-dispersion lanthanum glass elements to produce a well-balanced image with minimal aberrations It is particularly designed to reduce the disturbing blackout effect by effectively compensating for the spherical aberration of the pupil
  • IDEAL FOR ASTRONOMICAL TELESCOPE The XW30-R is the perfect eyepiece for viewing the nebula planets and exploring the night sky
  • WIDE RANGE OF XW SERIES LINEUP With a wide range of magnifications to choose from the XW series accommodates a wide range of both casual and specialized applications
  • ALL-WEATHER CONSTRUCTION The XW30-R features JIS Class 4 weatherproof construction making it possible to use it in drizzle or under night dew
  • WHAT'S IN THE BOX Includs front cap rear cap and plastic case
  • CLEAR COMFORTABLE VIEWING XW30-R eyepiece features an extra-wide 70° apparent angle of view and an extra-long 20mm eye relief to deliver an exciting image with a wide-perspective
  • This 42mm 2" telescope eyepiece offers bright, sharp and pleasing images of deep-space objects
  • Eye relief is a long 20mm, particularly attractive to eyeglass wearers
  • Eyepiece's 3-element lens design with multi-coatings ensures efficient light transmission for clear, vivid views
  • Threaded for use with 2" eyepiece filters
  • Views through the 42mm DeepView eyepiece are delightfully free of pincushion distortion and chromatic aberration
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How Could You Recognize Whether best 2 inch telescope eyepieces Suit With You Or Not?

Some of you may be reluctant to select one of the best 2 inch telescope eyepieces, to be honest. The main reason is that you didn’t study that before. There are pretty lots of factors that must be considered when investing in best 2 inch telescope eyepieces. You are expected to count on our expertise in best 2 inch telescope eyepieces to make the right choice. 

Along with these factors, we also include some questions concerned by many customers. It’s beneficial for you to look through these:

  • Why should you invest in this product? Does its value worth it?
  • How can you choose the best one? Which factors?
  • Which line of this product is most loved in the market?
  • Where if for you to ask for help with product problems?
  • What are the practical benefits this product brings about?

Nowadays, best 2 inch telescope eyepieces is among the most valuable items users tend to collect. The information sources on the Internet are also essential and available for you to get consulted. The proliferation of many websites and forums helps you have access to the buying guides more straightforward.

So now we move on to the significant factors related to best 2 inch telescope eyepieces you must keep in mind:


The telescope's magnification can be just as crucial as the aperture. The eyepiece used can alter the telescope's magnification. The maximum magnification that a telescope can use is approximately. Maximum magnification is approximately 2x the aperture in millimeters. A 102mm aperture telescope, on the other hand, can magnify upto 204 times. An eyepiece that magnifies more than the aperture will cause a smaller field of vision and a blurred image. A greater magnification can be preferred to a larger field of view, and better clarity.

Size And Portability

Dimensions and portability
Telescope designs that are large or heavy can take up much space and make it difficult to transport around the house and car.


The aperture of a telescope is defined as the size of the main lens, or mirror of the telescope (which may be slightly smaller than the outer diameter the main tube). This is the main technical consideration. It is designed to gather light. A larger aperture means more light is collected. This combined with the use of an eyepiece determines magnification or clarity. The area of the mirror or lens is directly proportional to its light gathering power. This depends on how large the radius. As such, it rises rapidly as the aperture increases. A 200mm telescope doesn't gather as much light as one 100mm telescope. It gathers approximately four times the amount.


Aperture is usually closely related to the budget. The larger the aperture the better.

Mounting System

Mounting refers to how the telescope follows moving objects. A mount called an alt-azimuth, or AZ mount, is the most suitable for a general purpose telescope. It moves the telescope in a straight line.

Ease Of Operation

You will enjoy your telescope more if it's easier to use and more intuitive. Refractor-type telescopes mounted on an AZ mount are simple to operate and easy to understand.


How Do I Safely Transport My Telescope?

You can transport the telescope in two main pieces: the mount and tube. Remove the telescope tube and mount by loosening the thumbscrews from the tube rings. The accessories, such as the bracket and finderscope, should be removed from the optical tube. Cap the telescope tube, and eyepiece. You can also remove fine-adjustment control cables or counterweight rod/counterweights. To transport the tripod legs, it is necessary to remove the accessory tray. It is possible to transport the telescope in a car without any problems. Although padding can protect the tube from scratches, it is not essential. After a bumpy ride, the mirrors might not be in collimation. However, collimation can still be necessary after transport with or without padding.

Will A Telescope Work Without An Eyepiece?

The objective cannot be used for visual reasons, since the eyes are unable to process the image created by it. You can use the telescope without an eyepiece to view cameras or other instruments.

What Is The Advantage Of A Large Aperture Telescope?

A larger aperture means a higher practical magnification limit. A larger aperture telescope can focus more light and allow for fainter objects to be seen than smaller apertures. A larger aperture telescope will give you better resolution when the air is stable and not turbulent.

How Do I Store My Telescope?

When storing your telescope, it is not necessary to remove the optical tube from the mount. You can store it in one place in dry and clean conditions. To prevent the telescope from becoming wet, you can cover it with heavy-duty plastic covers if it must be kept outdoors. The dust caps for the telescope's front and rear are both on. All accessories should be kept in separate boxes with their caps. To prevent dust from building up on the primary mirror, some people store the reflect telescope in two pieces. It isn't proven to work.

Should I Use Colour Filters?

For viewing detailed planetary details, colour filters are nearly a requirement. They can be inserted into your eyepiece barrel. You can use a particular colour to highlight specific features of planetary planets. You can often see up to three times more detail than if you look straight at the planet.

What Can I See With My Telescope?

Astronomically you can see all the planets (except Pluto), the Moon and the Sun, as well as the surface details of Mars and Jupiter. You also have the ability to view multiple stars, open and globular clusters, bright galaxies and other nearby clusters. There are many things to see on the terestria, including wildlife and sports. However, you should keep in mind that your daytime view is usually over hot areas so distant objects may shine.

Which Mount Should I Buy For My Telescope?

The alt-azimuth mount is best if your instrument is intended for only land-use. However, astronomical and dual-use instruments will be better served by the equatorial. You should ensure that your mount is sturdy enough to support the chosen telescope. Mounts that can support longer or heavier telescopes will need to be stronger in order for them to work at higher magnifications. If in doubt, mount the telescope higher than normal.

Will I See Objects As They Appear In Photographs?

Both yes and no. Yes and no. Bright objects such as the Moon and certain planets, and star clusters, will display colours and features in similar ways to photographs. However, fainter objects can be more difficult. Low light levels are too low for the eye to pick up colour, so bright nebulae can appear in shades of gray with small telescopes. Digital images and colour films can be exposed for long enough time to capture light in the visible spectrum, so photos show colours you cannot see visually.

How Much Power Does My Telescope Have?

Three types of power are available for telescopes. They can be compared to the normal performance of an ordinary human eye. These are light-gathering, magnifying, and resolution power. While all three are vital, the most significant is the resolving ability. A telescope's focal length will determine how much magnified an eyepiece can do. There is an acceptable magnification limit that can be achieved at 2x for every mm of aperture. An eyepiece with a magnification greater than this limit will not be of much use. A telescope's ability to gather light depends on its aperture size. The larger the aperture, the higher the resolution. These three powers will determine what you can see through the telescope. A 150mm telescope with a diameter of 150mm will, by comparison to the human eye and the 2x/mm rule, have a maximum practical magnifying ability of 300x and 600x light-gathering powers, as well as a resolution power of 0.8arc-seconds.

The list of best 2 inch telescope eyepieces is frequently updated whenever new data becomes available. Please take more time to visit our website to stay up-to-date with changes in the product.

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About Holly Becker

Holly Becker
Holly Becker is a commerce editor for Sanford ArtEdventures. She has years of experience testing products and writing about them, with the aim of helping people to improve their homes. Holly loves anything that makes her house look better, and she's excited to share her findings with others who want to do the same.

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