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Barlow lenses
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Dark Clear Skies 2″ UHC Filter ST4 Port Main feature:The Dark Clear Skies 2 UHC (Ultra High Contrast) Filter is designed to enhance the visibility of emission nebulae by selectively transmitting key nebular wavelengths while suppressing background skyglow and common sources of light pollution. Purpose & Use UHC filters are widely used in astronomy to improve contrast between emission nebulae and the surrounding sky. By reducing unwanted wavelengths from artificial lighting and natural skyglow, this
US$ 194.50
US$ 44.49
