Baader Telecentric Lens Systems for Hα solar filters

W A R N I N G

Looking at or near the Sun will cause instant and irreversible damage to your eyes, including blindness. Eye damage is often painless, so there is no warning to the observer that damage has occurred until it is too late. Do not point a telescope or its viewfinder at or near the Sun. Do not look through a telescope or its viewfinder as it is moving.

The full aperture of any instrument that is pointed at the sun must be covered with a proper solar filter or filter/mask combination.

Children and Visitors should be supervised by an adult at all times when partaking in solar observation. Otherwise, keep solar equipment out of a child's and visitors reach to avoid accidental injury.

Please read all manuals before use!

• For use with Solar H-Alpha systems
• For Solar Spectrum & Day Star Filters
• 2x, 3x & 4x

A telecentric system is used to convert shorter focal ratio telescopes to the desired f/30 beam needed by the rear mounted H-alpha Filter (i.e. Solar Spectrum filter). The Baader telecentric ensures that the output beam maintains a consistent normal incident angle across the full filter width. The result is a consistent bandwidth and high image contrast across the field of view. This lens system has been optimized to maintain an exceedingly high optical quality for dedicated solar use (>99% strehl at 656.3nm). Simpler barlow or barlow-based systems are not able to produce this level of accuracy or telecentricity. Hard Dielectric IR coatings further help to reject IR energy and protect the rear etalon from excessive heat energy.