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Many astronomers forget that the Calcium H-line and K-line yield virtually identical views of the Sun. Solar researchers who only image the Sun with CCD cameras often choose the K-Line for purely research purposes. Sadly, with Calcium K-line filters, many astronomers are unable to see the lower wavelength and miss out on all the fun. DayStar offers higher wavelength Calcium H-line filters for visual observers so that most clients can enjoy Calcium!
For use on F/7 or longer focal ratio refractors, the user needn't worry about configurations. Just insert in your diagonal, add an eyepiece and view. Short focal ratio refractors will need a telecentric 2x or 2.5x Barlow lens to get the best performance. Exact filter bandpass will vary based on final telescope application. No specific FWHM bandpass is designated, but it will be around 5Å. 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. DayStar even reduced power consumption, so the Quark can now operate all day off a small, palm-sized optional battery pack (not included in the box). Baffles have been added to increase contrast and AR coatings are optimized for the 397nm wavelength.
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
Not compatible with red or yellow glass ERFs. Recommended for use with a UV/IR cut filter for safety