DayStar Combo Quark (Chromosphere model)

daystarfilters.com/.../COMBOQuark.shtml

Type	Hydrogen-alpha (Hα)
Bandwidth	0.05 nm
Size	Other
Users	27
Images	485
Most often used with	ZWO ASI174MM
Known retailers	Agena Astro ( Back ordered )

Community notes

A H-alpha etalon filter with no integrated Barlow, fit for use on SCTs, Maks, or refractors of F/15 to F/30 focal ratio. From the [url=http://www.daystarfilters.com/downloads/QuarkFlyer.pdf]original Quark flyer[/url]: "Due to variation in the end user application, we cannot specify the precise FWHM of the filter. Instead, units of 0.8 - 0.6 Å are classified as PROMINENCE and units of 0.5 - 0.3 Å are classified as CHROMOSPHERE".