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The QUARK contains a custom Daystar Instruments 4
however the etalon will be approximately 0
Item has as a 90mm clear opening and allows you to safely view and/or image the sun
PRODUCT SPECIFICATIONS:
Quantum Hydrogen Alpha 0.5Å PE solar filter The QUARK contains a customDaystar Quantum Hydrogen Alpha 0. 5 PE (Professional Edition) Solar filter for use with refractors, SCTs, Maksutovs. Our precision Quantum housing incorporates ALL of the desired features for today's solar astronomer, and then some. Operation couldn't be simpler, just plug it in and a green light indicates when the filter is on band. The new Quantum Series body style is all about ease of operation total simplicity. The housing offers live LCD readout
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