| 68° Apparent Field of View | With their large 68° FOV the Hyperions are true wide angle eyepieces. They offer a crisp image up to the periphery and a long eye relief for comfortable viewing. |
| Superb Image Sharpness | The intricate optical layout of the Hyperion eyepieces results in an excellent image sharpness both on the optical axis and up to the periphery of the large field of view. Even in very fast Newtonians down to f/4 there will be only a very moderate degradation in sharpness towards the edge. This is particularly important for Dobsonian telescopes where a larger useful field of view effectively means that higher magnifications can be used successfully! |
| High Transmission and Contrast | Hyperion eyepieces feature an excellent multicoating on all glass-to-air surfaces. The lens edges are carefully blackened.
As a result you get a bright, clear and crisp image without distracting reflections or ghost images. |
| No Kidney Beaning | Many wide angle eyepieces suffer from an effect called kidney-beaning. This refers to an annoying black shadow entering the field of view when you move your eye a little out of the optical axis of the eyepiece. The result of this kidney-beaning is that viewing through the eyepiece is much less comfortable.
Baader Hyperion eyepieces have oversized lenses in order to avoid this effect and reduce it to a minimum. |
| No Vignetting | The large lenses offer a constantly illuminated field of view. In many simpler eyepieces you will notice a degradation of the image brightness towards the edge of the field of view. |
| Suitable for Binocular Use | Hyperion eyepieces have a large eye relief and a comfortable and "forgiving" viewing position. This makes them ideal for use on a binoviewer. The eyepieces are comparatively large, but most users will not have a problem. The minimum interpupillary distance (=distance between your two eyes) is 56mm. Due to their ergonomic shape the nose finds a comfortable position between the eyepieces. |
| 1.25" and 2" Telescope Adaptation | Optically the Hyperions are 1.25" eyepieces. For a more solid grip you may choose to attach them to a 2" focuser. The eyepiece body has an integrated 2" barrel with safety undercut in addition to the 1.25" barrel. Using this barrel will move the eyepiece a few centimetres closer to the telescope, which might be important when on use in a telescope with a tight back focus distance. Warning: Do not use this feature in a 2" star diagonal or prism diagonal! The 1.25" barrel might collide with the mirror! |
| One Eyepiece - Several Magnifications | Another special feature: With the optional Hyperion extension tubes you can fine-tune the magnification of your Hyperion eyepiece without the need for an additional optical element.
Just unscrew the 1.25" barrel and place the extension tube between it and the eyepiece proper. Depending on the length of the extension tube you can increase the magnification by about 40%.
Without the 1.25" barrel the focal length is approximately 25mm. This is useful for getting an overview, however please note that in this mode the eyepiece loses a lot of its sharpness, especially in the periphery. |
