Contact Rainbow Optics for all your Optical Filter needs. They offer Interference Bandpass Filters, Reflective Neutral Density Filters, Absorptive Neutral Density Filters, Long Wave Pass Filters, Short Wave Pass Filters to name a few.  For more information, Rainbow Optics provides a graph and specifications online for more precise ordering. Rainbow Research Optics offers many more optic services as well!  To view the optical filter graphs or for more information visit today!