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Daystar Quark Gemini H-alpha Filter (Chromosphere and Prominence)

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0.54 kg
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including VAT 20.00 % ( £332.50 )


Daystar Quark Gemini H-alpha Filter (Chromosphere and Prominence)

Daystar Quark Gemini H alpha Filter: Contains both Prominence and Chromosphere bandpass filters for instant slide-action switching between either view. Now, observers can enjoy the best of both options in one easy to use tool with no equipment swapping or refocusing of any kind. Push the slider arm side to side like in an eye exam to see the broad stroked prominences of wider bandpass, then the high contrast of narrow bandpass. Imagers can do comparison images and outreach astronomers can demonstrate surface structure and prominences and the science involved in wing shift.


Fully self contained solar filter, safe for human eyes and imaging.
Off-band blocking X-ray to 2microns. 22mm clear eyepiece aperture.
Fits into 1.25" and 2" telescope drawtubes - designed for use on refractor telescopes of F/5-F/8
Comes standard with 1.25" female eyepiece drawtube. T-adapter, C-mount adapter or 2" drawtube adapters are optionally available.

Includes built-in 4.3X telecentric barlow optimized for Hydrogen Alpha 656nm wavelength.
Contains TWO separate, independent Fabry Perot etalons of different FWHM bandpass ranges.
• One etalon of 0.5Å FWHM bandpass or narrower
• One etalon of 0.6Å FWHM bandpass or wider.
• Paired etalons will be matched to maximize effect of wide vs narrow bandpass.

Requires 2.0Amp 5VDC 10watts electrical power.
Includes wall adapter for 110-240VAC including international power plugs.
Boxed in environmentally controlled pelican style case.
Fits all visual and imaging adapters in Quark product line.

Quark Gemini offers BOTH "prominence" or "chromosphere" all-in-one.
~ Enjoy both Chromosphere and Prominence together for £1995

For use on refractors of F/4 to F/8**, the user needn't worry about configurations. Just insert in your diagonal, add an eyepiece and view.

The patent pending QUARK* contains a custom Daystar Instruments 4.2X telecentric barlow lens fully optimized in coatings and optical design specifically for the Hydrogen Alpha wavelength. This highly specialized telecentric lens offers superior field flatness.

Exact filter bandpass will vary based on final telescope application, so QUARK* assemblies are qualified with one element to show best prominences and the other to show best surface contrast (chromosphere).  No specific FWHM bandpass is designated.  

Outreach astronomers can use the prom vs chrom switch to demonstrate each feature with an extra teaching moment about wing shift going on in fast moving prominences.  Imagers can use the same switch to create comparison images without the need to exchange equipment or refocus with short lived features.

The fully optimized design eliminates the need for any adapters.  It's all combined in one lightweight eyepiece sized device. The new, compact design configuration eliminates unnecessary components, weight and associated costs. We even reduced power consumption, so the Quark* can now operate all day off a small, palm-sized optional battery pack. Baffles have been added to increase contrast and AR coatings are optimized for the 656nm wavelength.

*The QUARK* assembly is a product of DayStar Instruments, using DayStar Filters' Fabry Perot etalon technology.
** QUARK Filters may be used at shorter and longer focal ratios than recommended. F-ratios of F/9 and higher will offer a dimmer visual view and may only be bright enough for photographic applications. F-ratios of less than F/4 will be brighter, but also widen the effective FWHM bandpass performance of the QUARK filter.

  • Contains TWO separate Fabry Perot Etalon elements which may be shifted safely via push-pull into view.  
  • A hand-matched pair of narrower (<0.5Å FWHM) and wider (>0.6Å FWHM) etalons shall be SE grade and independently tuneable.
  • Ships with male combo 1.25" or 2.0" combo eyepiece snouts with safety indent slot directly into your diagonal
  • Ships with standard 1.25 female eyepiece drawtube output. Optional interchangeable 2" and SCT accessories available.
  • Brass compression ring to protect eyepiece.
  • Uses USB power, 5v 2.0amp
  • Includes 90-240VAC wall adapter with international plug adapters.
  • Two tuning knobs allow wing shifting +/- 0.5Ã with detents at every 0.1Ã
  • LED indicator for power, warming, ready, fault
  • 5 year warranty,
  • Optional 8-hour battery pack available.
  • Integrated, fully baffled 2 element telecentric 4.2X barlow optimized for 656nm
  • Integrated 12mm blocking filter
  • 22mm clear filter aperture
  • Best performance with F/4 - F/8 refractors
  • Full disk viewing possible on refractors up to ~450mm focal length refractors
  • No aperture limitations. May be used on larger refractors for higher magnification views
  • Ships in watertight pelican style equipment case for dust & humidity-free storage.
  • Not suited for off-axis application.

The Daystar Quark Gemini comes in a nice, heavy duty carrying case:

You will find a USB cable, multi-country PSU, instruction Manual and free eclipse glasses inside the case

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