Threaded Black Polymer Solar Filter for Cameras, 77mm 77mm threaded black polymer solar filter for cameras. Part #77T. CE & ISO approved. This filter should fit cameras with the same lens diameter. Black polymer is the most common filtering material for observing sunspots and granulation, through telescopes and cameras. The sun will appear in a natural orange color when viewed through your telescope using this filter. This is a high quality product of Thousand Oaks Optical, Arizona. A manufacturer of safe solar filters for over 30 years. Words of the producer: "Stronger than Mylar with the filtering properties protected within the substrate. Guaranteed five years." WARNING: ALWAYS MAKE SURE THE FILTER IS WELL ATTACHED TO THE TELESCOPE/BINOCULARS/CAMERA. IN CASE NECESSARY, USE STICKY TAPE TO SECURE IT. NEVER OBSERVE SUN WITHOUT A PROPERLY ATTACHED FILTER!