The Tiffen 6.6x6.6 81EF and 81EFND3 filter is a square warming filter designed for digital cameras, camcorders, and film cameras. It offers color correction effects and is a custom bundle from the United States. This filter has a drop-in mount fitting, making it easy to attach and use with a variety of camera setups. Its 6x6 inch size ensures a perfect fit for enhancing the warm tones in your photographs or videos, providing a professional-level solution for achieving ideal color balance.