Filters Helios Solar Glass Binocular 90mm

This pair of solar filters are safe for solar viewing when mounted on binoculars. Slip your solar filters over the ends of your binoculars optical tube. Helios Solar Glass® has a rating of Neutral Density 5 therefore blocking 99.999% of all light, including harmful IR and UV rays. The substrate is made of highly reflective, Helios Solar Glass®. The glass is mounted into an aluminum ring that slips over the sky end of your optical tubes. Secure and center the filters with a nylon thumb screw and felt tabs for filters 2″ thru 4″.

3 nylon thumb screws are used in Solar Filters 4.25″ thru 5.75″. Instructions for proper use and care for your Solar Filter insure a long filter life. When used properly, a natural yellow-orange image of the sun is viewed through the filter. Dependent on the size and strength of the optical device, you will see solar granulation (Sun's photo-sphere). Sunspots, planet transits, and a solar eclipse may be observed when present.