The Tough 3/4 Minusgreen - is the appropriate fluorescent correction for digital photography and video applications. Due to manufacturing changes in flourescent bulbs, the green content has been reduced: making the Full Minusgreen an over-correction, yet the 1/2 was not strong enough. This created a demand for a 3/4 Minusgreen to remove the green output from fluorescent and other discharge sources. This filter is also a more appropriate fluorescent correction for digital photography and video applications.