Don Goldman Tru-Balance LRGB E-series Color Filters set of 4 (1.25").
These filters are designed to simplify your imaging efforts, with shorter imaging time, G2V white-point balance , balanced OIII nebula color, and ~1:1:1 RGB combining for Kodak -E CCDs. They are an outgrowth of over a year and a half of research. Also works with the Apogee AP47 and Finger Lakes Dream Machine (MIG1024). All of the filters come in black anodized screw-in holders that fit most filter wheels. All LRGB filters have >90% peak throughput with AR (anti-reflective) coating.