By holding the Blue Ring Gaffer’s Glass up to one eye while standing no less than 10 ft away from the source of the light, you can look through the Blue Ring Gaffer’s Glass into your key light while your assistant focuses the light to your liking.
This will give you a precise pattern for where your light will be thrown, it also gives you an idea of drop off and voids.
The Blue Ring Gaffer’s Glass is also used to check the condition of light filament, and to locate the sun when it is behind clouds. The Blue Ring Gaffer’s Glass is not designed to look directly at the sun. Use it only to locate the sun through clouds.
The Blue Ring Gaffer’s Glass features 6061 aluminum with anodized finish, glass has a 3.8 density with UV inhibitor, and a 36" lanyard to be conveniently worn around the neck.
This tool is a must have for all Gaffer’s and DP’s Worldwide.