re: Filters, Colours, and Haematite...
I think you made the same mistake I did the first time I looked at the mini-TES graphs. You read the scale as nm instead of cm^-1. cm^-1 is sort of like a frequency measurement.
The real visible spectrum should be reversed from how you have it and to the far left beyond the edge of the graph.
1500 cm^-1 = 6.67 microns = 6,670 nm
1000 cm^-1 = 10 microns = 10,000 nm
500 cm^-1 = 20 microns = 20,000 nm
The Pancam takes images at much shorter wavelengths, from 430 to 980 nm. Which would be 23,300 to 10,200 cm^-1.