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Baader Planetarium 21mm Hyperion Eyepiece for 1.25" Focusers

SKU: AA2454621 MFR: HYP-21
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Key Features

  • Enjoy stunning views with this 21mm Hyperion eyepiece, perfect for detailed lunar observations.
  • Experience comfortable, extended viewing sessions thanks to the generous 20mm eye relief.
  • Achieve optimal clarity using this telescope eyepiece with 1.25" focusers for crisp images.
  • Explore the night sky with enhanced magnification; ideal for planetary and deep-sky objects.
  • Premium lens coatings deliver maximum light transmission for brighter, high-contrast visuals.
  • Durable and reliable, this Baader Planetarium eyepiece comes with a 2-year warranty for peace of mind.
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Special Order?Estimated to Ship: 08/16/2025
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Questions & Answers

Shopper : Why Did You Choose This?Francisco R : According to the images I looked at from Stellarium, the 21mm Hyperon eyepiece covers one of my last two eyepiece needs.

Reviews about this item

Review Summary

2021-11-21T07:38:13

Rated 5 out of 5

Great for Celestron 8SE

Perfect fit for my Celestron 8SE. Great Jupiter viewing. Nice wide view. Unit feels very well made - nice heft to it.

Mark J.

2021-09-03T17:29:52

Rated 5 out of 5

Excellent add-on for the Hyperion Zoom eyepiece!

Excellent add-on for the Hyperion Zoom eyepiece. Under the right seeing conditions it makes Saturn?s rings much more visible, and we even saw color from the surface of Jupiter on first light. Very happy with the purchase and definitely recommend it!

RUSSELL S.

2021-07-02T08:55:39

Rated 5 out of 5

Perfect add-on

Excellent when married up to the Baader Hyperion Mark IV 8-24mm Zoom! What a pairing!

Michael M.

2020-08-21T08:43:02

Rated 5 out of 5

Sharp, works well with the Hyperion Zoom eyepiece

Sharp, complements the Baader Hyperion Zoom eyepiece well. Comes with plenty of adapters to suit it to other eyepiece-scope configurations.

ADAM B.

2019-07-31T03:48:10

Rated 5 out of 5

Awesome lens

It's bigger and heavier than I anticipated, but makes for excellent viewing.

David B.

2018-08-18T10:23:04

Rated 5 out of 5

Hyperion modular eyepiece

This has excellent wide angle. Clear view from edge to edge. Great quality build.

Paul J.

2018-08-15T14:41:24

Rated 2 out of 5

Not as clear as expected.

Lens clarity was less than expected for price. Wide field of view was as described. It’s a rather heavy lens. I did not need a counter balance, but just a word of caution. Using with a 700mm/60mm telescope. Can see Jupiter and moons but not level of detail I’d like. I haven’t used it to see the moon yet. New moon or overcast.

Alexandria J.

2016-05-28T07:09:53

Rated 5 out of 5

Baader Hyperion eyepieces are provide great bang for the buck

I am an experienced amateur astronomer and I am currently converting my primary eyepiece set over to Baader Hyperions. These eyepieces provide a clear, wide field of view that rivals more expensive brands such as Televue. The only feature I don't like it the eyepiece guard which is separate rubber ring and is not incorporated into eyepiece casing.

James F.

2016-04-08T13:08:47

Rated 5 out of 5

Nice eyepiece!

Great contrast and clarity, good color. Nice wide view with good sharpness almost to the edge.

STUART M.

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Baader Planetarium Hyperion Specifications

  • Eyepiece

    21mm / 0.82"

  • Compatibility

    1.25" Focusers

  • Eye Relief

    20mm

  • UPC Code

    4047825011411

About Baader Planetarium Hyperion

FEATURED REVIEWS

Baader Hyperion eyepieces are provide great bang for the buck

By James F.

I am an experienced amateur astronomer and I am currently converting my primary eyepiece set over to Baader Hyperions. These eyepieces provide a clear, wide field of view that rivals more expensive brands such as Televue. The only feature I don't like it the eyepiece guard which is separate rubber ring and is not incorporated into eyepiece casing.

Nice eyepiece!

By STUART M.

Great contrast and clarity, good color. Nice wide view with good sharpness almost to the edge.

Experience the unparalleled clarity and expansive view of the night sky with the Baader Planetarium HYP-21 Hyperion 68-degree Modular Eyepiece. This high-quality, durable eyepiece is not just a rebranded version of its esteemed counterparts; it has been meticulously redesigned to enhance transmission, contrast, and incorporate innovative features that make it a standout in the field of astronomical equipment.

The Hyperion eyepiece is a testament to Baader Planetarium's commitment to delivering world-class performance and unique photo-visual features without requiring amateur astronomers to invest more in their eyepieces than their primary instruments. This versatile eyepiece offers a wide, flat 68-degree field of view, making it ideal for observing large celestial areas and capturing detailed images of stars, planets, and galaxies.

The innovative design of the Hyperion eyepiece ensures superb sharpness and color fidelity, even in fast telescopes. Whether you're focusing on-axis or off-axis, you can expect pitch-black high contrast fields and crystal-clear images. This is further enhanced by the world's finest optical coatings and superior mechanics that Baader Planetarium is renowned for.

User-friendly and comfortable, the Hyperion eyepiece is designed for relaxing observations. It boasts a forgiving eye-position, 20mm of eye-relief, and an extra-large eyelens. Moreover, it's free from the common annoyances of 'kidney-beaning' and blackouts, ensuring a seamless and enjoyable stargazing experience. This eyepiece is designed to be used with 1.25-inch focusers, making it a versatile addition to your astronomical equipment collection.

Baader Planetarium Hyperion Features

  • Consisting of 8 elements in 5 groups (3.5 mm - 21 mm), the Hyperion optical design delivers outstanding sharpness and color correction over a 68-degree wide apparent field (65 degrees for the 21 mm)
  • The Hyperion optical design has been chosen to deliver a exceptionally comfortable view, thanks to its 20 mm of eye-relief, large eyelens, and a pupil free of the kidney-beaning and blackouts common in many wide field eyepieces
  • The new 24 mm uses a different optical design and delivers the same outstanding performance over it's 68-degree wide apparent field

Warranty Information

This product has a limited warranty of 24 months for parts and 24 months for labor.

Key Features

  • Enjoy stunning views with this 21mm Hyperion eyepiece, perfect for detailed lunar observations.
  • Experience comfortable, extended viewing sessions thanks to the generous 20mm eye relief.
  • Achieve optimal clarity using this telescope eyepiece with 1.25" focusers for crisp images.
  • Explore the night sky with enhanced magnification; ideal for planetary and deep-sky objects.
  • Premium lens coatings deliver maximum light transmission for brighter, high-contrast visuals.
  • Durable and reliable, this Baader Planetarium eyepiece comes with a 2-year warranty for peace of mind.

What's in the box:

  • Baader Planetarium 21mm Hyperion Eyepiece
  • Carrying Pouch
  • Baader Planetarium 2 Year Warranty