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Daystar Quark Calcium H-Line Filter - TESTED EX REVIEW SAMPLE


Daystar Quark Calcium H-Line Filter - TESTED EX REVIEW SAMPLE

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Normal Price £1,070.00
£849.00
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Price includes VAT, plus delivery

EX-DEMONSTRATION CALCIUM QUARK. THIS IS THE EXAMPLE USED FOR THE SKY AT NIGHT REVIEW. EXCELLENT.

Calcium H-Line

Many astronomers forget that the Calcium H-line (397nm) and K-line (393nm) 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 older astronomers are unable to see the lower wavelength and miss out on all the fun. We offer higher wavelength Calcium H-line filters for visual observers so that most clients can enjoy the Sun's features as seen at the Calcium wavelength. Needless to say the Calcium Quark is also perfectly suitable for imaging.

The Calcium Quark is design to be used with Refractors having a focal ratio of F/7 or greater. Just insert in your diagonal, add an eyepiece and view. Short focal ratio refractors will need a telecentric to get the best performance. Of course for high magnification views a telecentric will be needed to maintain the bandpass performance of the etalon.

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. Baffles have been added to increase contrast and AR coatings are optimized for the 397nm wavelength. We even reduced power consumption, so the Quark can now operate all day off a small, palm-sized optional battery pack.

The Calcium Quark can NOT be used with normal front mount ERF's as those are designed to block the Calcium wavelengths used. Instead, we recommended using an UV/IR cut filter for safety on scopes up to 100mm. For larger scopes up to 150mm a Blue filter is suggested as this performs a greater degree of energy rejection.

 

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