Released in March 2012 *This filter is for photography purposes only. It cannot be used for solar eclipse observation. *Never look at the sun through this filter as it may have a negative effect on your eyes. *This filter should be used with lenses with a 35mm equivalent focal length of 17mm or more. If used with an ultra-wide-angle lens with a focal length shorter than 17mm, the filter frame may appear in the image or cause vignetting. Round-framed filter for solar photography. Made with a high-precision vapor deposition process for exceptional neutrality and color reproduction. Reduces light intensity to 1/100,000 (16.5 stops of light reduction). [58SPROND100000] 58SPROND100000 Released March 2012. This filter, specifically designed for solar photography, reduces light intensity to 1/100,000 (16.5 stops of light reduction). Round-framed. Made with a high-precision vapor deposition process for exceptional neutrality and color reproduction. ■ Specifications ■ Filter Diameter: 58mm, Dimensions: φ60 x 7mm, Weight: 19g. *This filter is for photography purposes only. It cannot be used for solar eclipse observation. *Never look at the sun through this filter, as it may be harmful to your eyes. *This filter is designed for use with lenses with a 35mm equivalent focal length of 17mm or longer. When used with an ultra-wide-angle lens with a focal length shorter than 17mm, the filter frame may appear in the image or cause vignetting.