At a Glance
13mm
Focal Length
68°
Apparent FOV
15mm
Eye Relief
1.25"
Barrel Size
Score Breakdown
Overview
The Baader Hyperion 13mm sits in a focal length sweet spot, offering a practical middle ground between high magnification and comfortable field of view. Its 68-degree apparent field of view is genuinely wide for an eyepiece in this class, and at $196 it competes seriously with eyepieces costing considerably more. The Phantom Group multi-coatings, developed to Zeiss standards, deliver noticeably high contrast and minimal internal reflections. This matters most when observing objects like planetary nebulae or globular clusters against a dark background, where stray light kills fine detail.
The modular design is one of its more unusual features. Optional tuning rings let you adjust the effective focal length, giving you some flexibility without buying an entirely separate eyepiece. It also accepts both 1.25-inch and 2-inch focusers natively, and connects directly to most DSLR camera bodies for afocal imaging. Worth noting: at 68 degrees, some observers may see slight edge softening depending on their telescope's focal ratio.
Faster scopes below f/6 may show this more than slower refractors or SCTs. Overall, this is a well-built, thoughtfully designed eyepiece that rewards observers willing to invest in quality glass.
Key Features
- 68-degree apparent field of view provides noticeably wider sky coverage than standard eyepieces
- Phantom Group multi-coatings reduce internal reflections and improve contrast on faint objects
- Modular body accepts optional focal length tuning rings, adding flexibility without extra eyepiece purchases
- Fits both 1.25-inch and 2-inch focusers with no adapter needed
- Direct DSLR and fixed-lens camera connection supports afocal photography
- 13mm focal length suits a wide range of telescopes and targets, from open clusters to lunar detail
- Includes a soft leather carry bag, making storage and transport more practical than most competitors
Specifications
| Focal Length | 13mm |
| Apparent FOV | 68° |
| Eye Relief | 15mm |
| Barrel Size | 1.25" |
| Design | Modified Erfle |
| Elements/Groups | 7/4 |
| Series | Hyperion |
| Coating | Fully Multi-Coated |
| Waterproof | No |
Popular Telescopes for This Eyepiece
Sky-Watcher FlexTube 300 SynScan
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Celestron NexStar 130SLT
50x / 2.6mm exit pupil / Newtonian
Sky-Watcher FlexTube 300P
115x / 2.7mm exit pupil / Dobsonian
Celestron 114LCM
77x / 1.5mm exit pupil / Newtonian
Amazon Reviews
I am a novice at astronomy so I bought a decent five inch telescope to learn about our universe. It worked. I live in a light polluted area but enjoyed the "stock" Celestron 10mm and 25mm eyepieces that came with my telescope but they were obviously most just pastic parts to keep the cost down. Afte...
I have a nice Celestron scope and wanted a decent eyepiece that would increase my magnification level while keeping a decent field of view. This eyepiece fits that bill perfectly. It is fairly large and "fat"; you can almost "feel" the quality. Although I am a newbie, I feel like a professional astr...
I was very surprised how good The quality is, I compared it to a Tele vue 24mm And this one beat it, I sent the Televue back this had a brighter view the Televue was A little Darker But outside of that they Both were excellent except baader planetarium Was less than half the price or and a little bi...
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