Preliminary normalised N-CAM spectral response curve at beginning of life (BOL; with the red dots representing the mission requirements) compared to those similar planet hunting missions such as CHEOPS (orange dotted-dashed line), TESS (green dashed line) and Kepler (blue dotted line). Each response curve is computed with cubic spline interpolation for illustrative purposes. The grey shaded areas are cut-off wavelengths which are dominated by optical transmission in the blue (left) and by the CCD anti-reflection coating in the red (right). The blue and red shaded regions illustrate the blue and red transmission regions of the two F-CAMs, respectively. Data courtesy: ESA and NASA.