K corrections as a function of redshift, z, and T_eff for different filters of interest for the simplified case without extinction. Circles show results for T_eff ∈ [3500, 6000] K (from red to blue circles; cf. the color bar below), with fixed log g = 1.5 and [Fe/H] = 0.0. The fiducial 10 d MW Cepheid analog is shown by thick solid lines. Results for the fiducial TRGB star ([Fe/H] = −1.75) are shown as thick dashed black lines.