The SW150 Solar Eclipse Filter is a 100x100mm square glass dense filter designed specifically for photographing a solar eclipse (please see the notes below regarding use). Because of the light intensity of the sun, trying to photograph a solar eclipse, even using the lowest ISOs and fastest shutter speeds results in overexposed, blown-out images which fail to properly show the fascinating process. As a result, a very strong, specialised dense filter is required in order to bring the exposure range down to manageable levels. The Lee Solar Eclipse filter is designed specifically for this job. Supplied with a foam lined protective tin.