Mars Exploration Rover Pancam filter responses Mars Exploration Rover Pancam filter responses Pancam (top) geology filters and (bottom) solar filters normalized transmission profiles. All of the data plotted represent the total system throughput, but the solar filter response increase do not include the effects of the neutral density (ND) coatings. The solar filter response increase near 700–750 nm is a red leak in the blue solar filter (L8) that may contribute substantial red light to the blue solar filter flux. Additional characterization of the magnitude of this red leak is ongoing. Bell et al. 2003 (DOI: 10.1029/2003JE002070)Figure 6 from "Mars Exploration Rover Athena Panoramic Camera (Pancam) investigation"PDF of article available free here.