4″x4″ Solar Filter Sheet for Telescopes, Binoculars and Cameras

Black polymer is the most common filtering material for observing sunspots and granulation, through telescopes and binoculars.
These sheets are a quality product of Thousand Oaks Optical, Arizona, a manufacturer of safe solar filters for over 30 years. “Stronger than Mylar with the filtering properties protected within the substrate. Guaranteed five years.”
Make a filter on your own for any telescope / binoculars / camera, and for a fraction of what factory made filters cost.

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