Similar to their standard Quark, Daystar Filters designed the Combo Quark H-Alpha Eyepiece Solar Filter for use with f/15 to f/30 refractors, Schmidt-Cassegrain, or Maksutov-Cassegrain telescopes. For those who use off-axis energy rejection filters (ERFs) a 2° off-axis snout adapter is included for proper light-path alignment to ensure the correct filtration and produce the best images.
This all-in-one hydrogen-alpha filter is engineered to eliminate unnecessary components which reduced the size and weight, and enabled it to fit in a compact form factor that simply inserts into 1.25" or 2" diagonals and accepts 1.25" eyepieces. This design enables the use of nighttime telescopes for solar viewing. It is tuned specifically for viewing prominences. Prominences, a detail of the chromosphere projected against the blackness of space behind the sun, are seen with improved contrast due to the filter's narrower bandpass versus a wider bandpass filter tuned for conventional chromosphere surface viewing.
While there are no OTA aperture limitations, Daystar recommends the use of front-mount energy rejection filters. On Schmidt OTAs aperture-reducing off-axis ERFs are recommended, while Maksutov or refractors can be used with full-apertures ERFs. The filter is powered via a micro-USB port, and Daystar includes a power cord and an AC adapter to meet the high-power requirements of 5 VDC 1.5A. To enable its use at home and abroad, a set of international outlet plugs is provided with adapters for the US, UK, EU, and Australia.