- Filter Diameter (external): 184mm
- Filter Diameter (internal): 174mm
- Filter Thickness: 24mm
- Filter Clear Aperture: 128.5mm
- Filter Weight: 74 grams (2.6 ounces)
- Filter Material: Celestron proprietary Mylar filter
EclipSmart filters are made by American Paper Optics, allowing you to observe sunspots and solar events like eclipses, while protecting you from both IR and UV light, filtering out 99.999% of visible light. American Paper Products filter technology is guaranteed safe for direct solar observation and has been independently tested by SAI Global Assurance Services. With two Velcro straps and four self-adhesive Velcro pads for added safety, you can be assured that the solar filter cannot be accidentally knocked off and will provide Solar Safe, ISO compliant viewing.
Solar Safe products conform to and meet the transmission requirements of ISO 12312-2, Filters for Direct Observation of the Sun, EN 1836:2005 + A1:2007 (E) for an E15 Filter for the Direct Observation of the Sun and, AS/NZS 1338.1:2012, Filters for Eye Protectors.
Warning: do not continue to use a solar filter after it has been damaged or you could permanently damage your eyes. You should always inspect your solar filter before using it.