User's Tip: Due to optical design limitations, systems configured with Grating #12 cannot be set above ~575 nm. In fact, although the efficiency of the grating is >30% out to 700 nm, the optical design of the spectrometer prevents it from "seeing" wavelengths >~575 nm. However, Grating #11 can be set at wavelengths >575 nm and <800 nm, and will achieve comparable optical resolution (FWHM).