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
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