Black Polymer sheets are commonly used to make home-made solar filters. Can be used for naked eye observation of the sun, telescopes, finders, and binoculars. - We only sell Thousand Oaks Optical (TOO) solar filters, the leading manufacturer that has been making safe solar filters for 35 years. - Safely view the sun anytime, including during all phases of an eclipse with TOO solar filter sheets, lens filters, glasses, or viewers. TOO's exclusive high quality substrates provide superior safety features, sharper solar images, and a pleg orange solar image. All products meet CE requirements. Only TOO has CE and ISO certification. Safe for unlimited visual and photographic use. Transmission: 1/1,000th of 1% (Optical Density 5). - TOO products were exclusively chosen by NASA for use aboard the Space Shuttles. Other professional users include: ABC, BBC CBS, NBC, CNN, NOVA, The Discovery Channel, National Geographic, and most major universities and observatories throughout the world. TOO uses the latest technology for manufacturing and developing new products. Tens of thousands of their solar filters and millions of their solar eclipse viewers are used world wide.

WARNING: ALWAYS MAKE SURE THE FILTER IS WELL ATTACHED TO THE TELESCOPE/BINOCULARS, USING STICKY TAPE, TO KEEP IT FROM FALLING WHILE OBSERVING. The sun will appear in a natural orange color when viewed through your telescope using this filter. Make a filter on your own for any telescope / binoculars / camera, and for a fraction of what factory made filters cost. Silver-black polymer is the most common filtering material for observing sunspots and granulation, through telescopes and binoculars.