DayStar QUARK PROMINENCE Solar Filter
Daystar Filters designed this version of the QUARK H-Alpha Eyepiece Solar Filter 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.
Filter Properties :
- Hydrogen-alpha bandpass
- Integrated 12mm blocking filter
- 21mm clear filter aperture
- Tuned to 0.8-0.6Å for viewing prominences
- Tuning knob allows for ±0.5Å wing shift for Doppler-shift compensation
- Markers at every 0.1Å for reference and repeatability
- LED indicators for power, warming, ready, and fault
Optics:
- Integrated 4.3x Barlow lens
- Lens and optical coatings designed specifically for 656nm H-alpha wavelength
- Two-element telecentric lens design keeps light waves parallel to flatten the field of view and reduce parallax as magnification increases
- Recommended OTA Specifications
- No aperture limitation
- Best performance with f/4-f/8 refractors
- Full-disk viewing on refractors up to 450mm focal length
- For apertures over 80mm (3.1″), or for long-duration solar viewing, an UV/IR cut filter should be used for energy rejection
- Not suited for off-axis applications
Power:
- 5 VDC, 1.5A micro-USB port
- 90-240 VAC wall adapter
- Set of international outlet plugs for US, UK, EU, and Australia
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