DayStar Filters - Calcium Quark Filter

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This All-In-One design marries high quality components of adapters, snouts and Daystar Calcium H filter into one simple assembly.

Manufactured by:
DayStar Filters

Product Description

Daystar Instruments QUARK is the first Calcium "Eyepiece"
CALCIUM H MODEL for F/7 or longer focal ratio refractors

This new, All-In-One design merges the top quality of adapters, snouts and Daystar Calcium H filter into one straightforward assembly. Through design efficiency and improvement, now clients can appreciate the known quality optics of DayStar* at a reasonable cost. 

Why H-line?

Various stargazers miss the fact that the Calcium H-line and K-line yield basically indistinguishable views of the Sun. Solar scientist who simply picture the Sun with CCD cameras more often than not pick the K-Line for research. Tragically, with Calcium K-line filters, many senior astronomers can't see the lower wavelength and miss out. DayStar Filters offers a higher wavelength Calcium H-line filter for visual solar observers so that the majority of clients can appreciate Calcium!

For use on F/7 or longer focal ratio refractors, the customer doesn't need to worry about the designs. Just insert in your corner to corner, include an eyepiece and view. Short focal ratio refractors will require a 2x or 2.5x Powermate to get the best results. Accurate filter bandpass will differ based on final telescope application. No specific FWHM bandpass is designated, but it will be around 5å. The totally optimized setup disposes of the necessity for any adapters. It's merged in one lightweight eyepiece sized device. The new, compact design configuration gets rid of pointless components, weight and related costs. DayStar even diminished power consumption, so the Quark can now work throughout the day with a little, palm-sized optional battery pack. Bewilders have been added to increment contrast and AR coatings are improved for the 397nm wavelength

Not compatible with red or yellow glass ERFs.  Recommended for use with a UV/IR cut filter for safety.

*The QUARK assembly is a product of DayStar Instruments, using DayStar Filters' Fabry Perot etalon technology.

  • Calcium H line (3968.5Å), approx 5Å FWHM.
  • 1.25" eyepiece snout with safety indent slot directly into your diagonal or focuser

  • Standard 1.25 eyepiece drawtube output with optional 2" accessories available.

  • Brass compression ring to protect eyepiece. Uses USB power, 5v 1.5amp Includes 90-240VAC wall adapter with international plug adapters.

  • Optional 8-hour battery pack available.

  • Integrated 25mm blocking filter, 21mm clear filter aperture.  No barlow or focusing elements included.

  • Best performance with F/7 - F/30 refractors full aperture.

  • Full disk viewing possible on refractors up to ~1800mm focal length

  • No aperture limitations. May be used on larger refractors for higher magnification views

  • Ships in convenient Twist-Case for safe, dust-free storage.






Name DayStar Filters - Calcium Quark Filter
Manufacturer DayStar Filters
UPC 702730991091
Bandwidth N/A


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