Coronado CEMAX 18mm Eyepiece (1.25"). For use with Coronado H-alpha Solar Telescopes and filters. 1.25" Barrel Size. Specifically designed for use at H-alpha (or Hα) wavelengths, this specialty eyepiece uses optimized coatings to enhance contrast, minimize glare and also affords excellent contrast for planetary viewing. With caps.
Features 20mm eye relief, 52° apparent field of view, and rubber eye guard.
Please note: This eyepiece is NOT a filter. For solar observing it MUST be used in conjunction with a Coronado Hα Solar telescope or a telescope with a Coronado filter set appropriately and safely mounted.