BM-500 CL / BB-500 CL- 38 -10. Specifications10.1. Spectral responseFig. 26. Spectral response for BM-500CLFig.27. Spectral response for BB-500CL400 450 500 550 600 650 7001.00.90.80.70.60.50.40.30.20.1Relative ResponseWavelength ( nm )IIR Cut Filter