Baader D-ERF Energy Rejection Filters for H-alpha Solar Observation Size:75mm AM technology

AM technology

With the Q-turret revolver and the Classic Eyepieces

both end threaded metal caps prevent ash when not in use

Mounts: Astro-Physics 1100GTO-AE

Baader D-ERF Energy Rejection Filters for H-alpha Solar Observation Size:75mm AM technologyBaader Energy Rejection Filter (D ERF) H Alpha Solar Observation Filter The Baader Energy Rejection Filter (D ERF) is specifically designed for H alpha solar observation, allowing telescopes to achieve full aperture resolving power. This filter significantly reduces the thermal energy entering the telescope, protecting your solar spectrum filter and minimizing thermally induced seeing effects for a more stable and detailed observation experience.