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Quality Achromat Doublet 60mm refractor
The Quark contains a custom Daystar Instruments 4
and weighs 3
and blocks all other parts of the spectrum in the UV and IR
Sodium filter assemblies are designed for sub-angstrom observations with single-cavity design
Quantum Calcium II K 2Å PE Combo Quark Quality Achromat Doublet 60mm refractorDaystar Calcium K line Quantum Filters 2. 0 suitable for academic purposes. Ideal application: CCD photography or indoor visual viewing environment. Traditionally, university research has employed the Calcium K line for studies of Calcium on the Sun. These studies have been instrumental in determining depth of the solar atmosphere. Calcium offers TWO strong absorption lines at 393. 3nm and at 396. 9nm, known as the K and H lines. Researchers have
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