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Introducing the Sodium D line version of the Quark
This allows an even quicker adaptation to the ambient temperature and reduces the tube seeing (boundary layer removal)
110-240VAC wall adapter
8-1/2"-11-1/2"(216mm-292mm)
5mm from male C flange
Explore Scientific 3" Flattener and .7X Focal Reducer Nikon Introducing the Sodium D lineExplore Scientific 3" Flattener With . 7X Focal Reducer Introducing this High quality and functional 3" Flattener With . 7X Focal Reducer by Explore Scientific. This 3" Field Flattener . 7x Focal Reducer is designed to enhance your astrophotography experiences and is a multi faceted accessory. This addresses the edge of field aberrations caused by curved focal planes as a field flattener to ensure that your night at the eyepiece results in crisp,
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