Filters cannot be changed without removing the spectrograph from the telescope. Contact the MMTO staff for special filtering requirements. Blue Channel Optical Parameters Click for a drawing of the Blue Channel layout . Click here for more information on using the Blue Channel . Red Channel Optical Parameters Click for a drawing of the Red Channel layout .
Outer surface is asphere.
Spherical both sides. A to 1 micron. Approximately 6 inches in diameter. Details of available gratings tabulated below. 45 degree wedge of SF-6.