May 15, 2001 - Replacing "measured" data posted May 4, 2001. Here is the mean Quantum Efficiency of the MegaCam CCD's (as determined by CEA) as a function of the wavelength (nm) % 350 48.9 400 78.3 450 85.7 500 84.7 550 82.8 600 80.8 650 77.8 700 71.8 750 61.9 800 49.4 850 37.6 900 24.8 950 12.0 1000 4.3