DayStar Filters Questar Quark H-Alpha Eyepiece Solar Filter (Prominence)

DayStar Filters Questar Quark H-Alpha Eyepiece Solar Filter (Prominence)

DayStar Filters Questar Quark H-Alpha Eyepiece Solar Filter (Prominence)

B&H # DADSZQP MFR # DSZQP
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Expected availability: 7-14 business days

Product Highlights

  • Use Questar OTAs for Solar Viewing
  • Questar Eyepiece and Rear Port Threads
  • 656nm H-Alpha Filter
  • 21mm Clear Aperture Blocking Filter
  • Tuned for Prominence Viewing
  • ±0.5Å Wing Shift Tuning
  • For Questar Telescopes up to F/3
  • No OTA Aperture Limitations
  • 5 VDC, 1.5A micro-USB Port
  • Optional Off-Axis ERFs Required
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SAFETY FIRST: Observing the Sun without the proper protection may result in serious personal injury, including permanent eye damage and blindness, and/or damage to equipment. Never point an optic at the sun without an approved solar filter on the front of the optic. For direct solar viewing, viewing the sun through an optic, or when using cameras with an optical viewfinder, ensure your filter is ISO 12312-2 (also written as ISO 12312-2:2015) certified. Never use photographic neutral density filters for direct solar viewing, viewing the sun through an optic, or when using cameras with an optical viewfinder.

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  • 1Description

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.

This all-in-one hydrogen-alpha filter is engineered to eliminate unnecessary components which reduced the size and weight, and enabled it to fit in a compact form factor that simply threads onto either port and accepts standard 1.25" eyepieces. It is tuned 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.

While there are no OTA aperture limitations, Daystar recommends the use of front-mount aperture-reducing off-axis energy rejection filters. The filter is powered via a micro-USB port, and Daystar includes a power cord and an AC adapter to meet the high-power requirements of 5 VDC 1.5A. To enable its use at home and abroad, a set of international outlet plugs is provided with adapters for the US, UK, EU, and Australia.

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
UPC: 702730991022
In the Box
DayStar Filters Questar Quark H-Alpha Eyepiece Solar Filter (Prominence)
  • Wedge Adapter
  • Quark H-Alpha Filter
  • Plastic Case
  • USB Power Cord
  • Wall Outlet Power Adapter
  • Set of International Plug Adapters
  • Limited 10-Year Warranty
  • Table of Contents
    • 1Description
    Type Hydrogen-Alpha
    Filter Factor 0.8 - 0.6 Å
    Blocking 25 mm, 21 mm clear aperture
    Application Prominence viewing
    Size Questar eyepiece and rear port thread
    Accepts 1.25" eyepieces
    Multi-Coated Yes
    Power Requirement 5 VDC, 1.5 A
    Construction Aluminum alloy
    Dimensions 5.7 x 2.8 x 2.2" / 14.6 x 7.1 x 5.5 cm
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