MODS1 SDSS Filters

 

Figure 1: The set of SDSS Barr filters installed in MODS1. The u and g filters are in the blue channel and the r, i and z filters in the red channel. The curves represent the raw transmission measured at the factory (blue), and the calculated efficiency in the instrument (accounting for the optical surfaces and the CCD) for both direct (magenta) and dichroic (red) modes.