The Baader Hyperion 72° 31mm Aspheric eyepiece uses high quality Phantom group-coatings for maximum contrast and zero internal reflections. With a larger viewing angle compared to the human eye, higher star limit size, unsurpassed colour accuracy and low weight, the Hyperion Aspheric eyepieces are a compelling offering for an attractive price.
The aspheric eyepiece design includes aspheric lens surfaces which are now the standard in the most modern camera lenses, offering the best image performance over the entire image field. The aspheric eyepiece construction allows for fewer glass surfaces in combination with the extreme quality of the Phantom Group multi-coatings. The result is an eyepiece that delivers a brighter, more contrast-rich image than even more expensive wide-angle eyepieces with spherical lenses.
The 1.25" and 2" barrels are threaded for connection of all standard 2" filters. The SP54 and M43-Video-Photo threads for afocal and classical projection photography permit optional adaptation of practically any camera with optional accessories.
Each Aspheric eyepiece is equipped with screw threads on both sides in order to be able to install it as a projection system in an optical beam path. On the telescope side there is a 2" SC thread in the eyepiece body which allows the eyepieces to be screwed firmly to the end of the tube of all Schmidt Cassegrain optics without a plug-in sleeve and without a diagonal.
Baader's Phantom Group coating is a 7-layer broadband anti-reflective coating with extremely low residual reflection. Each group of lenses has this coating applied. The coating has been optimized so that they are most effective where the human eye has its greatest sensitivity at night, at around 520nm.
