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 0.8-0.6â„« for viewing prominences
• Tuning knob allows for ±0.5â„« wing shift for Doppler-shift compensation
• Markers at every 0.1â„« for reference and repeatability
• 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