DayStar QUARK for Questar PROMINENCE Solar Filter

Designed specifically for Questar telescopes, but similar to their standard Quark, Daystar Filters’ Questar Quark H-Alpha Eyepiece Solar Filter is outfitted with Questar-specific eyepiece and rear port threads to install quickly and easily, without adapters, directly into your OTA.

Filter Properties :

• Hydrogen-alpha bandpass
• Integrated 25mm 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
• Internal baffles increase contrast
• Optical coatings designed specifically for 656nm H-alpha wavelength
• LED indicators for power, warming, ready, and fault
• Use and Handling
• Built with Questar eyepiece and rear port threads
• For off axis energy rejection filters
• Brass compression ring to protect eyepiece from scratches
• Accepts 1.25″ eyepieces
• Recommended OTA Specifications
• For use with Questar telescopes
• No aperture limitation
• Must use a front-mount energy rejection filter to prevent overheating the OTA
• Not for use with full aperture Schmidt-Cassegrain ERFs – damage to secondary mirror may result
• Best performance with f/13 and slower focal ratio OTAs

Power

• 5 VDC, 1.5A micro-USB port
• 90-240 VAC wall adapter
• Set of international outlet plugs for US, UK, EU, and Australia