---
product_id: 55283423
title: "Baader Hyperion 21mm Eyepiece"
brand: "baader planetarium"
price: "€ 351.85"
currency: EUR
in_stock: true
reviews_count: 13
category: "Baader Planetarium"
url: https://www.desertcart.pt/products/55283423-baader-hyperion-21mm-eyepiece
store_origin: PT
region: Portugal
---

# PHANTOM-GROUP multi-coatings for max light 68° ultra-wide field of view Dual 1.25" & 2" barrel compatibility Baader Hyperion 21mm Eyepiece

**Brand:** baader planetarium
**Price:** € 351.85
**Availability:** ✅ In Stock

## Summary

> 🔭 Unlock the universe in ultra-wide clarity — don’t just look, experience!

## Quick Answers

- **What is this?** Baader Hyperion 21mm Eyepiece by baader planetarium
- **How much does it cost?** € 351.85 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/55283423-baader-hyperion-21mm-eyepiece)

## Best For

- baader planetarium enthusiasts

## Why This Product

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

## Key Features

- • **Modular Precision Tuning:** Customize your focal length effortlessly with optional Fine Tuning Rings—tailor your stargazing to perfection.
- • **Expand Your Cosmic Horizons:** Experience a breathtaking 68° wide field that pulls the universe into your view like never before.
- • **Crystal-Clear Views Every Time:** Baader’s PHANTOM-GROUP multi-coatings maximize light transmission and image contrast for razor-sharp clarity.
- • **Ready for Visuals & Photography:** Versatile threading and adapter options let you capture stunning astrophotography or enjoy immersive visual sessions.
- • **Seamless Fit, Ultimate Flexibility:** Dual barrel design (1.25" & 2") ensures perfect compatibility with virtually any telescope setup.

## Overview

The Baader Hyperion 21mm Eyepiece delivers a professional-grade 68° wide field of view with dual 1.25" and 2" barrel compatibility, enhanced by Baader’s PHANTOM-GROUP multi-coatings for superior light transmission and contrast. Modular design allows focal length customization via optional Fine Tuning Rings, making it ideal for both high-precision visual astronomy and astrophotography. Supplied with a premium leather case and dust caps, it’s a versatile, durable, and cost-effective upgrade for serious telescope users.

## Description

Modular dual 31.7mm/50.8mm 68 degree widefield eyepieces that performs as well as eyepieces three times its price. Each Hyperion is supplied with a soft leather storage bag for safe keeping, and two dust caps for storing the eyepiece with either the rubber eyeguard either folded up or down! The Hyperion design has has both a 31.7mm (1 1/4") and 50.8mm (2") barrel for fitting into either size focuser or diagonal. Both barrel sizes have a safety groove for safe use in your telescope. Each Hyperion features Baader's PHANTOM-GROUP Multi-Coatings for maximum light transmission and the ultimate in image contrast. There are two photographic threads on each Hyperion, M43 and SP54. These threads are located under the rubber eye-cap, or rather beneath the thread protecting ring which is made of high-quality and aging-resistant silicone rubber.A variety of focal lengths can be obtained from each Hyperion. A second focal length is easily acheived by removing the first group of lenses. Additional FL can then be acheived by purchasing a 14mm Fine Tuning Ring (FTR), 28mm FTR, combining the 14mm and 28mm FTR, and with 2" Baader Filter (height 8mm).The effective FL of the 21mm eyepiece is as follows:With 14mm FTR: 17.6mmWith 28mm FTR: 15.5mmCombined FTR: 14mm2" Baader filter: 18.5mmRemoving first group of lenses: 32.2mmThe Hyperion can be combined with a Baader adaptor ring to mount a camera directly onto the eyepiece. In addition, there are a large number of Baader adapting rings and fittings to make the Hyperion suitable for (almost) every task in astronomical - and nature - photography as a high quality projection optic or as a tele-extender. The Hyperions work as well for photographic applications as they do for visual use.

Review: Excellent eyepieces, and a bargain in the kit with the case. - I purchased these from desertcart.de for about £425. Each EP is boxed as an individual retail item which is fantastic; if like me you already own one or more and will sell-on the equivalent new EP. Considering each EP retails at between £80 & £90 and you get the case which is really handy for storage (which normally retails around £50) this is a great deal. I already had the 21mm EP and was really impressed with the image quality on a celestron 9.25 SCT. With the poor weather I've only been able to try them once so far, but have been really pleased with the These clearly aren't TV Delos league, but they are a fraction of the price. I doubt I'll use them all; specifically the 5mm as that's probably a bit over the top for UK viewing conditions. The 13 mm and 10 mm EPs gave a very clear image; and I'm looking forward to trying the others. In the picture of the case I've attached I have the optional tuning rings which you won't need with this set (there's no need for such levels of adjustment).
Review: Great eyepiece - Bought this to use on my telescope, it's a bit expensive but worths the money...Great quality, great optics, sharp image and can be used easily for photography.

## Features

- 68 Degree Wide Field Eyepiece
- The Hyperion has both a 31.7mm (1 1/4 Inch) and 50.8mm (2 Inch) barrel for fitting into either size focuser.
- Features Baader's PHANTOM-GROUP Multi-Coatings for maximum light transmisson.
- A variety of focal lengths can be obtained by using Baader's Fine Tuning Rings (not included)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0018IUKF8 |
| Best Sellers Rank | 840 in Telescope Accessories |
| Box Contents | Hyperion 21mm Eyepiece, Soft Leather Case, Two Dust Caps |
| Brand Name | Baader Planetarium |
| Coating | StarBright XLT |
| Compatible Devices | Camera |
| Customer Reviews | 4.6 4.6 out of 5 stars (291) |
| Exit Pupil Diameter | 0.75 Millimeters |
| Eye Piece Lens Description | Hyperion |
| Field Of View | 68 Degrees |
| Finderscope | Reflex |
| Focal Length Description | 21 millimeters |
| Focus Type | Manual Focus |
| Global Trade Identification Number | 04047825011411 |
| Item Weight | 1 Pounds |
| Manufacturer | Baader Planetarium Germany |
| Manufacturer Part Number | 2454621 |
| Model Name | Baader Hyperion |
| Model Number | 2454621 |
| Mount | Tripod Mount |
| Objective Lens Diameter | 28 Millimetres |
| Optical-Tube Length | 50.8 Millimetres |
| UPC | 797864325560 |

## Product Details

- **Brand:** Baader Planetarium
- **Compatible devices:** Camera
- **Eye piece lens description:** Hyperion
- **Finderscope:** Reflex
- **Focus type:** Manual Focus
- **Item weight:** 1 Pounds
- **Model name:** Baader Hyperion
- **Objective lens diameter:** 28 Millimetres
- **Optical tube length:** 50.8 Millimetres
- **Telescope mount description:** Tripod Mount

## Images

![Baader Hyperion 21mm Eyepiece - Image 1](https://m.media-amazon.com/images/I/71Vgck0cjTL.jpg)
![Baader Hyperion 21mm Eyepiece - Image 2](https://m.media-amazon.com/images/I/81ZqIbyyyvL.jpg)
![Baader Hyperion 21mm Eyepiece - Image 3](https://m.media-amazon.com/images/I/81lI4LU8mbL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent eyepieces, and a bargain in the kit with the case.
*by J***C on 3 May 2015*

I purchased these from Amazon.de for about £425. Each EP is boxed as an individual retail item which is fantastic; if like me you already own one or more and will sell-on the equivalent new EP. Considering each EP retails at between £80 & £90 and you get the case which is really handy for storage (which normally retails around £50) this is a great deal. I already had the 21mm EP and was really impressed with the image quality on a celestron 9.25 SCT. With the poor weather I've only been able to try them once so far, but have been really pleased with the These clearly aren't TV Delos league, but they are a fraction of the price. I doubt I'll use them all; specifically the 5mm as that's probably a bit over the top for UK viewing conditions. The 13 mm and 10 mm EPs gave a very clear image; and I'm looking forward to trying the others. In the picture of the case I've attached I have the optional tuning rings which you won't need with this set (there's no need for such levels of adjustment).

### ⭐⭐⭐⭐⭐ Great eyepiece
*by L***U on 27 January 2020*

Bought this to use on my telescope, it's a bit expensive but worths the money...Great quality, great optics, sharp image and can be used easily for photography.

### ⭐⭐⭐⭐⭐ I wrongly ordered an 8mm by mistake-but i am very glad i did
*by M***R on 27 September 2014*

A young friend of mine let me use his 5mm and 10mm Baader units.I thought they were first class. I wrongly ordered an 8mm by mistake-but i am very glad i did. These lenses are such a clever design--i call them the LEGO OF EYE-PIECES. A couple of morons on some sight i came across had the usual moan-even down to the packaging. I found nothing to moan at,the lens at 8mm has a bright-sharp focus on my big optical machine. I can*t wait for Jupiter to come around later on in the year. It has the largest eye-lens i have seen on such a power lens. The apparent field does seem wider than 68 degrees. LEGO take the achromat out of the lens end and magically,it becomes about 22mm focus. The Andromeda M31 spread right across the field-and did seem brighter than all the other lenses i have. It was a sight to see--very diffuse and ghostly. To sum up--great service from Germany via Amazon--great price-delivery time--quality--i am very happy with the 8mm,and when finances allow-i will probably try to end up with the whole set. That would be good. Hope this helps any thinking about a future buy cheers for now---Garreth

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-05-16*