This filter adds a dramatic 8 point star diffraction around any light source, it works best in dark conditions, where the effect can really pop. The filter itself was made by a special process than can no longer be used, due to a change in the materials now available. This filter does not have a holder or any way of attaching it to your device and has to be held by hand over the lens. The filters are big enough to make this easy without your fingers getting in the way. If you enjoy experimenting with your photography, this could be a great filter to carry with you when taking night time shots. This filter adds a dramatic 8 point star diffraction around any light source, it works best in dark conditions, where the effect can really pop. The filter itself was made by a special process than can no longer be used, due to a change in the materials now available. This filter does not have a holder or any way of attaching it to your device and has to be held by hand over the lens. The filters are big enough to make this easy without your fingers getting in the way. If you enjoy experimenting with your photography, this could be a great filter to carry with you when taking night time shots. This filter adds a dramatic 8 point star diffraction around any light source, it works best in dark conditions, where the effect can really pop. The filter itself was made by a special process than can no longer be used, due to a change in the materials now available. This filter does not have a holder or any way of attaching it to your device and has to be held by hand over the lens. The filters are big enough to make this easy without your fingers getting in the way. If you enjoy experimenting with your photography, this could be a great filter to carry with you when taking night time shots.