I have several different filters, and not only can you use them as one, but you can also combine them (as they screw together) for even more light spectrum filtration. During day time investigations with the ambient light being super bright and illuminating everything they work extremely well.
I"m not saying everyone should drop there modded cams and go 100% filters, but I am saying if your new to paranormal investigations, filters are a less expensive way to go other than buying all those different cams.