---
product_id: 6826411
title: "Orion 8923 20mm Expanse Telescope Eyepiece"
brand: "orion"
price: "€ 74.77"
currency: EUR
in_stock: true
reviews_count: 13
url: https://www.desertcart.es/products/6826411-orion-8923-20mm-expanse-telescope-eyepiece
store_origin: ES
region: Spain
---

# 66° ultra-wide field of view 18mm eye relief for glasses Threaded barrel for 1.25" filters Orion 8923 20mm Expanse Telescope Eyepiece

**Brand:** orion
**Price:** € 74.77
**Availability:** ✅ In Stock

## Summary

> 🔭 See More, Miss Less: Unlock the Universe with Orion's 20mm Expanse Eyepiece!

## Quick Answers

- **What is this?** Orion 8923 20mm Expanse Telescope Eyepiece by orion
- **How much does it cost?** € 74.77 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/6826411-orion-8923-20mm-expanse-telescope-eyepiece)

## Best For

- orion enthusiasts

## Why This Product

- Trusted orion brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Glasses-Friendly Comfort:** 18mm eye relief ensures you never have to remove your glasses to enjoy crystal-clear views.
- • **Expand Your Cosmic Horizons:** Experience a stunning 66° apparent field of view that reveals more of the night sky in one glance.
- • **Filter-Ready for Custom Views:** Threaded 1.25" barrel lets you easily attach Orion filters to enhance your stargazing experience.
- • **Built to Block Light Pollution:** Internally blackened aluminum barrel eliminates stray light for clearer, deeper sky observations.
- • **Precision Optics for Sharpness:** High contrast and excellent color correction deliver razor-sharp celestial details every time.

## Overview

The Orion 8923 20mm Expanse Telescope Eyepiece offers a wide 66° field of view and 18mm eye relief, making it ideal for eyeglass wearers seeking expansive, sharp, and high-contrast views. Its internally blackened aluminum barrel reduces internal light scatter and supports 1.25" filters, delivering professional-grade optics at an accessible price point.

## Description

From the Manufacturer This 20mm Expanse 1.25" telescope eyepiece offers a wide field of view and superior optical performance at a bargain price. Long 18mm eye relief lets eyeglass wearers view the entire field comfortably without removing their glasses. Expanse eyepieces offer a wide 66 degrees apparent field of view to let you see more of the sky. Delivers sharp views with good color correction and high contrast. Aluminum barrel is internally blackened to eliminate internal light scattering, and is threaded to accept 1.25" Orion filters

Review: Wonderful addition to my meager eyepiece collection - I have an Orion SkyQuest XT6 for over 10 years, and I've only had 3 eyepieces the whole time. Their standard Sirius Plossl 25mm, 17mm and 10mm. For the most part, the 10mm is pretty much useless, as the field of vision is so narrow that constant adjustments need to be made. I decided to give the Expanse series a try. This eyepiece is by far the best in the of the 4. Near Detroit, the light pollution is pretty bad. Viewing the plants and the moon is usually OK. My previous higher powered eyepieces usually made things look really bright and blurry. The Orion Nebula is usually a grey smudge. With the 9mm Expanse, I was able to see more shape to the cloud, and even a handful of stars in its heart. Cloud bands on Jupiter never looked better! I was also able to get a significant amount more detail on the moons surface than what I am used to. Looking at the sun was uneventful today -- only two sunspots. Ultimately, this is definitely worth buying!
Review: Not a bad lens at all. - I bough this a few weeks ago, and I can say that I've been very satisfied with this product. This lens can fit on a Meade telescope as well as an Orion. The views are nice and sharp for its level. Got good views of Jupiter and its moons, Saturn and its rings, Mercury (too brilliant to see a clear picture of it), the Orion Nebula, and close enough star systems like Syrius and others. The only thing I must be dissatisfied with right now is the weather: I haven't had many a clear-sky night in the past couple of weeks. But the lens is good. I can't wait to find filters for it!

## Features

- This 20mm Expanse 1.25" telescope eyepiece offers a wide field of view and superior optical performance at a bargain price
- Long 18mm eye relief lets eyeglass wearers view the entire field comfortably without removing their glasses
- Expanse eyepieces offer a wide 66 degrees apparent field of view to let you see more of the sky
- Delivers sharp views with good color correction and high contrast
- Aluminum barrel is internally blackened to eliminate internal light scattering, and is threaded to accept 1.25" Orion filters

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0000XMXZM |
| Best Sellers Rank | #525 in Telescope Eyepieces |
| Customer Reviews | 4.4 4.4 out of 5 stars (162) |
| Date First Available | November 20, 2003 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.4 ounces |
| Item model number | 8923 |
| Manufacturer | Orion |
| Product Dimensions | 3.5 x 2 x 1.75 inches |

## Product Details

- **Brand:** Orion
- **Eye Piece Lens Description:** Wide Field
- **Field Of View:** 66 Degrees
- **Finderscope:** Reflex
- **Focal Length Description:** 20 millimeters
- **Focus Type:** Manual Focus
- **Global Trade Identification Number:** 00759270089238
- **Manufacturer:** Orion
- **Objective Lens Diameter:** 18 Millimeters
- **UPC:** 759270089238

## Images

![Orion 8923 20mm Expanse Telescope Eyepiece - Image 1](https://m.media-amazon.com/images/I/71zqi8JfnJL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Wonderful addition to my meager eyepiece collection
*by F***T on February 14, 2013*

I have an Orion SkyQuest XT6 for over 10 years, and I've only had 3 eyepieces the whole time. Their standard Sirius Plossl 25mm, 17mm and 10mm. For the most part, the 10mm is pretty much useless, as the field of vision is so narrow that constant adjustments need to be made. I decided to give the Expanse series a try. This eyepiece is by far the best in the of the 4. Near Detroit, the light pollution is pretty bad. Viewing the plants and the moon is usually OK. My previous higher powered eyepieces usually made things look really bright and blurry. The Orion Nebula is usually a grey smudge. With the 9mm Expanse, I was able to see more shape to the cloud, and even a handful of stars in its heart. Cloud bands on Jupiter never looked better! I was also able to get a significant amount more detail on the moons surface than what I am used to. Looking at the sun was uneventful today -- only two sunspots. Ultimately, this is definitely worth buying!

### ⭐⭐⭐⭐⭐ Not a bad lens at all.
*by N***R on March 29, 2011*

I bough this a few weeks ago, and I can say that I've been very satisfied with this product. This lens can fit on a Meade telescope as well as an Orion. The views are nice and sharp for its level. Got good views of Jupiter and its moons, Saturn and its rings, Mercury (too brilliant to see a clear picture of it), the Orion Nebula, and close enough star systems like Syrius and others. The only thing I must be dissatisfied with right now is the weather: I haven't had many a clear-sky night in the past couple of weeks. But the lens is good. I can't wait to find filters for it!

### ⭐⭐⭐⭐ On the fence about this one
*by W***I on February 20, 2014*

I must say that so far, I have only used this with my solar scope so I can't write a fair review about stargazing with it. For sun watching, I'm not too excited about it. For one thing, while eye relief is usually a positive thing, with daylight use, you get all glare until you block it with a fist around the eyepiece. I wish the rubber was longer or it had adjustable eye cups. The rubber eye cup folds down and the dust cap fits over that. It was so tight that when I removed the cap, the rubber came off with it and was very difficult to replace so be careful removing the cap. There is also a red glow in the FOV around the sun instead of a black field and a reflection right in the line of sight so that I have to move around to an exact location to get the reflection to move from direct line of sight and this is with the outside light completely blocked from entering the eyepiece. As far as the actual image, again with the sun, the wide FOV is not really very necessary with this medium power but I am looking forward to using it at night where it will prove valuable, I'm sure. The image is sharp and well defined in the center. Right now, by far not my favorite EP for solar viewing, but not really the fault of the piece itself. I'll be back to update the review after some night time use. As I'm sure all of you astronomers out there can attest, as soon as you get new equipment, it's either cloudy and warm or clear and cold.

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-02-09*