Quark H-Alpha Eyepiece - Prominence Model

The DayStar Quark H-Alpha Eyepiece - Prominence Model is an all-in-one hydrogen-alpha solar filter that integrates a 4.2x telecentric Barlow lens, etalon filter, tuning optics, and eyepiece adapter into a single compact assembly for direct insertion into a telescope diagonal. Optimized for observing solar prominences with a 0.6-0.8 Angstrom bandpass, this narrowband filter transforms standard refractors into specialized solar telescopes while preserving their use for nighttime astronomy. Compatible with refractors having focal ratios of f/4 to f/8 with apertures up to 150mm, it offers convenient USB power operation with an optional palm-sized battery pack for all-day observing without complex configurations or additional adapters.