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Does not support auto-focus or electronic aperture control
snouts and Daystar MgI b2 line filter into one simple assembly
Inside/back of filter is black to reduce unwanted internal reflections
Contains TWO separate
making doppler studies possible by photographing in each line and deriving difference images after subtracting an average solar velocity image
Daystar CALCIUM QUARK Filter Solar Imaging Does not support auto-focus orDaystar 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
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