Ideal for sun viewing, the SV229 solar filter complies with ISO 12312-2:2015 standards, so you can use it with confidence. It provides clear, crisp views of sunspots, eclipses, graininess through telescopes and binoculars while rejecting harmful ultraviolet and infrared radiation. The sun appears naturally orange when viewed through a telescope using this solar filter. The SV229 Solar Filter is a must-have for observing the sun without damaging your eyes. This optical solar filter fits snugly around the telescope's aperture.