Baader has evolved the wide field astronomical eyepiece to a new level with the introduction of the Hyperion Aspherics. The 31mm Baader Hyperion Aspheric 72º Modular Eyepiece is one of the world's first to incorporate aspheric surfaces! This new technology has allowed Baader to eliminate eyepiece aberrations without the usual penalty of extra lens elements, excessive size and weight, or higher
Baader 36mm Hyperion Aspheric Telescope Eyepiece
The Baader Hyperion-Aspherics are great for projection imaging, and are threaded to accept the full line of Hyperion Digital T-Rings for a robust direct attachment of almost any camera. The clever use of 2"x24tpi SCT threads for attaching the 2" barrel permits the Hyperion-Aspherics to directly thread onto the rear cell of popular SCTs. This results in the highest rigidity possible for imaging. Two barrel sizes are provided with each Hyperion Aspheric. The standard 2” barrel provides the full 72º field of view, and a special wide field 1-1/4" barrel provides the maximum true field ever in this barrel size, with a field stop of 1.265”(32mm)! - perfect for extracting every bit of field possible in 1.25" focusers or binoviewers.
Baader Planetarium 31mm Hyperion Aspheric Telescope Eyepiece Features...
- The Baader Hyperion Aspheric eyepieces offer freedom from blackouts, kidney beaning, and lack of distortion, and combine with long eye relief to produce a view that is uncommonly comfortable and natural for all users. Even eyeglass wearers and users of popular astigmatism correcting lenses will enjoy the comfort level of the Baader Hyperion Aspherics!
- The ultra-wide 72º field of view of these eyepieces are extremely flat and without distortion, and are virtually free of angular magnification distortion.
- Baader’s renowned Phantom Group Multi-Coatings and thorough internal baffling produce an extremely bright and high contrast view that is free of scatter.
- The Hyperion Aspheric eyepieces accept Televue's Dioptrx astigmatism correcting lenses.
- The 31mm Baader Hyperion Aspheric weighs 13.8 ounces or 390 grams.
- Additional Information
SKU BA-HYP-36 Manufacturer Baader Optical Design Hyperion Aspheric Barrel Size 1.25"/2" Warranty 1 Year Warranty Eyepiece Field of View - Apparent 72º Eyepiece Focal Length 36mm Eyepiece Eye Relief 20mm Eyepiece Manufacturer Series Baader Hyperion Aspheric Eyepiece Weight 14.7 oz. Field Stop 46mm Number of Lens Elements & Groups Not supplied by manufacturer Comes with Dust Caps? Yes Comes with Eye Guard? Yes
Customer Reviews 2 item(s)
- I love it
I'm rather new to astronomy,(2 years, I just upgraded my 6 Dobsonian to a 10 Dobsonian, so the view I was getting with just the eyepiece that came with the new scope was quite amazing. After some careful research I decided to go with the Baader Hyperion 36mm, 2-1.25, and I was blown away.The night it came, it was a warm,clear night for viewing, considering I live in a Chicago suburb, and it was January, and the moon was full. I kept changing eyepieces to compare all the other views with this eyepiece, and it wasn't even close. I just started aiming the scope at what looked like an empty black sky, only to be blown away with how many stars, galaxies, and many other objects that were actually there. With the wide field of view and it's clarity make it seem like your looking out a window. I meant to be outside for about 20 minutes, but I got so caught up with the amazing views, I ended up being out for over an hour. The quality, and price make this eyepiece a no brainer. If all Baader eyepieces are this good, I'm going to be switching over all my existing ones. I think I'm spoiled now. If your not familiar with OPT, I can also highly recommend them. They ship very fast, and answer all my questions promptly.
1= Houston, We Have a Problem & 5= It's Out of This World
- Hyperion aspheric 36 mm
I have owned other Hyperions, also own the Pentax Zoom 6.5-19.5 mm and Hyperion Zoom, but this Hyperion aspheric excels in low power views with sharp views in almost 75 % of the field, excellent contrast, world class multicoatings ( no internal or external reflections , space-walk experience, a lot of eye reflief and excellent color balance. I think the BEST BUY for for wide fields.
1= Houston, We Have a Problem & 5= It's Out of This World
- Included Items
- Baader 36mm Hyperion Aspheric Eyepiece
- Questions & Answers
Product QuestionsThe description states 1.25" / 2". If I have only a 1.25" focuser, can I use this lens? If so, how? And, what is the focal length of the this lens using a 1.25" focuser? Thank you!Question by: laura on Oct 15, 2014 12:48:22 PMHello Laura,
Thank you for your question. You indeed can use this lens with a 1.25" focuser since it comes with both 2" & 1.25" barrels. The focal length does not change when doing so but you will make your field of view narrower in the 1.25" mode because you are stopping down the light cone with reference to the 2" barrel.Answer by: Roderick (Admin) on Oct 19, 2014 11:51:04 AMIs that TELE VUE DIOPTRX - 2.00 DIOPTER accessory advertised on the same page, easily attachable to your 36mm eyepiece?Can this and The 31 also be used with Newtonians..?. I only asked because someone stated it could only be used with that type of Telescope (SCT's)Question by: VegasStarGazR on Mar 1, 2014 5:54:41 PMThe short answer is yes, as long as you have a 2" focuser. The long answer is yes, but due to exit pupil restrictions and coma with fast Newtonians they may not work especially well below f/5.
A fully dark adapted pupil in an adult observer's eye will dilate to 5-7mm (usually toward the lower range as you get older), meaning that a telescope producing an exit pupil larger than this will be wasting light by having it hit the inner iris rather than the pupil. In addition, coma in fast Newtonians and astigmatism and slight optical defects in the human eye become more prevalent with exit pupils of 4-5mm and larger. The exit pupil is found by the focal length of an eyepiece divided by the f/ratio of the scope, so with the 36mm and an f/4.5 scope -> 36/4.5 = 8mm exit pupil. For an f/6 scope you get 6mm, which is more manageable.
An 8mm exit pupil is only usable in very dark skies with a young observer, fully dark adapted eyes with no astigmatism, a coma corrector in place, and the knowledge that you are still losing a bit of light in exchange for a wider field. If you are in the city, you may see problems with the eyepiece including a shadow from the secondary mirror in the center of the FOV due to your eyes not fully dark adapting with the light pollution.Answer by: Chris (Admin) on Mar 3, 2014 5:57:37 AMWhat is the Apparent Field of View using the 1.25" barrel? The information gives 72 deg. for the 2" barrel but nothing for the 1.25" barrel. Thank you.Question by: Rob on Dec 29, 2015 7:27:00 PMUnfortunately, we do not have a shipping scale with enough resolution to get a precise answer, but the difference in weight is no more than an ounce or two, as most of the mass (and all of the lenses) are the same in either configuration.Answer by: Chris Hendren (Admin) on Dec 30, 2015 2:13:00 PMWhat is the Apparent Field of View using the 1.25" barrel? The information gives 72 deg. for the 2" barrel but nothing for the 1.25" barrel. Thank you.
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