Rainbow Research Optics offers many different Optical Filters.  They offer Interference Bandpass Filters, Reflective Neutral Density Filters, Absorptive Neutral Density Filters,Long Wave Pass Filters, Short Wave Pass Filters, Color Glass Bandpass Filters, Color Glass Longwave Sharp Cut Filters, Heat Control Filters and Heat Absorbing Filters. Rainbow Optics offers top high quality, just visit www.rainbowoptics.com to learn more.