Daystar CALCIUM QUARK Filter solar astronomy 90-240VAC AC power adapter is

90-240VAC AC power adapter is included

Our telecentric optical system offers a full disk field of view visually

Wavelength: Sodium D (5890

humidity can cause a darkening of the blocker/trimmer element

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Daystar CALCIUM QUARK Filter solar astronomy 90-240VAC AC power adapter isDaystar Quark Calcium H Model Filter is the first Calcium Eyepiece for F 7 or longer focal ratio refractors. This new, All In One design marries high quality components of adapters, snouts, and Daystar Calcium H filter into one simple assembly. Through design efficiency and optimization, now users can enjoy the known high quality optics of Daystar at an affordable price. Why Calcium H line? Many astronomers forget that the Calcium H line and K line