SolarLite Filter for Telescope, fits ETX90, C-90, Questar 3.5, Wm. Optics ZS80II ED, Orion Obs. 70 & Astroview 90, Orion Explorer 90

108mm .25" SolarLite Filter for 90mm .50" instruments. This filter should fit the following models: C-90, ETX 90, Questar 3.5, Wm. Optics ZS80II ED, Orion Obs. 70 & Astroview 90, Exployer 90 and instruments of similar outer diameter. Part # S4250. Please read carefully: 108mm .25" is the diameter of the filter. The filter fits like a cap by friction. To be absolutely sure that the filter will fit, please measure the outer diameter of your instrument and make sure that it is not larger. SolarLite filters have the optical quality of the glass with the advantages of impregnated polymer (Thousand Oaks Optical Black Polymer). The sun will appear in a natural yellow-orange color when viewed through your telescope using this filter. 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! International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.