• Baader Hyperion Eyepiece, 13mm (#HYP-13), wt 390g (13.8oz).
• Modular 1.25" and 2" dual barrel eyepiece.
• 68° apparent field of view with 20mm eye .
• 8 lens elements in 5 groups, fully multi-coated.

The Baader Planetarium Hyperion 68 degree Modular Eyepieces offer world-class performance and unique photo-visual features, at an unheard of price. No longer do amateurs need to spend more on their eyepieces than their primary instrument, in order to get true high-end performance in a wide-field eyepiece. Not just a different branded version of their highly regarded cousins, the Hyperions have been totally redesigned to deliver better transmission, contrast, and useful new features. Baader Planetarium has worked hard to give the Hyperions the world's finest optical coatings, superb mechanics, and their unique multifunctional design. As a visual eyepiece, we have found the Hyperions deliver superb sharpness and color fidelity across their 68 degree wide, flat-field, even in fast teles. In our own comparisons to our personal favorites, the Pentax XL, the Hyperions matched the Pentax in every regard, and at just over 1/3 the price! From their superb on-axis and off-axis sharpness, to their pitch-black high contrast field, the Hyperions really work. Viewing through a Hyperion is notably comfortable and relaxing, due to their forgiving eye-position, 20mm of eye-, extra-large eyelens, and an optical design that is free of annoying 'kidney-beaning' and blackouts. Some highlights of the Hyperion; Consisting of 8 elements in 5 groups (3.5mm - 21mm), the Hyperion optical design delivers outstanding sharpness and color correction over a 68 degree wide apparent field (65 degree for the 21mm). The Hyperion optical design has been chosen to deliver a exceptionally comfortable view, thanks to its 20mm of eye-, large eyelens, and a pupil free of the kidney-beaning and blackouts common in many wide field eyepieces. The new 24mm uses a different optical design and delivers the same outstanding performance over it's 68 degree wide apparent field. It is totally free of blackouts a