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DAYSTAR Combo Quark Prominence Filter
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.
Filter Properties :
Hydrogen-alpha bandpass
Integrated 25mm blocking filter
21mm clear filter aperture
Tuned to 0.8-0.6â„« for viewing prominences
Tuning knob allows for ±0.5â„« wing shift for Doppler-shift compensation
Markers at every 0.1â„« for reference and repeatability
Internal baffles increase contrast
Optical coatings designed specifically for 656nm H-alpha wavelength
LED indicators for power, warming, ready, and fault
Use and Handling
2° off axis 1.25″ front adapter for use with off axis Schmidt and Maksutov energy rejection filters
Fits 1.25″ diagonals and drawtubes
Accepts 1.25″ eyepieces
Brass compression ring to protect eyepiece from scratches
Recommended OTA Specifications
No aperture limitation
For use with f/15-f/30 refractors, or Schmidt and Maksutov-Cassegrain OTAs
Maksutov OTAs with a focal ratio of up to f/15 can be used at full aperture, but must use a front-mount ERF to prevent overheating the OTA
Schmidt OTAs must use an off-axis aperture reduction ERF
Full-disk viewing on refractors up to 1800mm focal length
Not for use with full aperture Schmidt-Cassegrain OTAs – damage to secondary mirror may result
Power
5 VDC, 1.5A micro-USB port
90-240 VAC wall adapter
Set of international outlet plugs for US, UK, EU, and Australia
