BAADER HYPERION 68° EYEPIECE 8mm BA18 Some possible causes of this

Some possible causes of this problem are:

ensuring that the etalon in your h-alpha filter does not degrade over time and that the central wavelength passed by the etalon stays on-band

a longer draw tube travel of 35mm and a higher payload capacity of 10 kg

It has an optical thickness of 2mm

The filter is made from a Schott RG 830 substrate with "super stacked" dielectric coatings for pure transmission

BAADER HYPERION 68° EYEPIECE 8mm BA18 Some possible causes of thisThe Baader Hyperion 68 8mm Modular eyepiece uses high quality Phantom group coatings for maximum contrast and zero internal reflections. The Hyperion range of multi function eyepieces feature a modular design with the ability to change the focal length via extension rings. Both 1. 25" and 2" barrels are included, with the 1. 25" barrel able to be unscrewed to add fine tuning rings. Because this section contains the first group of lenses, changing the