Baader Planetarium Hyperion Aspheric Modular 31mm Eyepiece

Baader Hyperion 31mm Aspheric Modular Eyepiece
These Phantom Group Multi-Coated eyepieces offer ultra-wide 72 degree fields of view and dual barrel configuration that makes it compatible with both 1.25" and 2" eyepiece holders. The 2" barrel provides the full 72 degrees field of view, whilst the 1.25" barrel that was specially designed for this eyepiece provides max possible true field of view available in this size and focal length.

The Baader Hyperion Aspheric 2"  eyepieces compete with the world's best wide field eyepieces and offer compelling advantages, such as widefield, to-the-edge aberration-free sharp views with unmatched colour fidelity, light weight and attractive price. In addition these are also very comfortable to use and luck issues that many other, sometimes even more expensive eyepieces suffer from, i.e. kidney beaning and blackouts that appear when you move your eye out of the centre slightly.

So, how do they achieve this?

The eyepiece design includes aspherical lens surfaces. Aspherical lens surfaces are being used in most moder camera lenses to achieve the best image quality within the smallest possible space. The aspheric eyepiece design with fewer glass surfaces in conjunction with Baader's Phantom Group Coating provides brighter images with contrasts higher than achieved by other, twice as expensive eyepieces that use spherical lenses.

Projection Photography

Each Hyperion Aspheric eyepiece has got a thread at both ends that enables them to use in a projection photography system.

The eye-side of the eyepiece has got M43 and SP54 threads. There is a a huge selection of optional Baader Hyperion adapters called Hyperion Digital T-rings (Hyperion DT-ring) that are available from 365Astronomy and can be used between the eyepiece and a dSLR camera body with or without a camera lens. CCD cameras or camcorders can also be connected. This versatile use of the eyepiece for projection photography makes it possible to achieve the necessary magnification for a wide range of angular sizes that is especially important when documenting small objects, like planets or double stars at high resolution.

The telescope side has got a 2" SC thread which allows to screw the eyepiece directly into the back of any Schmidt-Cassegrain telescope. This increases immensely the stability of this photography setup.

Also, if used visually, whilst threaded directly to the back of the SC telescope, the largest possible true field can be achieved in compare to any available 2" eyepiece.

Binoviewer use of Baader Hyperion Aspheric eyepieces

The Baader Hyperion Aspheric eyepieces are the only long focal length, wide angle 2" eyepieces that can be connected to astronomical telescopes via binoviewers and comfortably used. In addition to the 2" nosepiece, these eyepieces also come with a 1.25" nosepiece (with a 2" SC thread) that allows use of these aspheric eyepieces in nearly any astro quality binoviewer. Please note that the minimum interpupillary distance should not be below 56mm.

Specifications and features
Apparent Field of View: 72 degrees
Coating: Phantom Group Multi-coatings
Build: 6 lens elements in 4 groups
Eye reliefe: 17mm (Eyeglass wearers can use it comfortably)
Weight: 356g (with 2" barrel) / 365g (with 1.25" barrel)

Baa-26-2454631