Logarithm of the production rates and dust-to-gas ratios of C/2020 F3 with respect to CN and to OH as a function of time and heliocentric distance. The horizontal dashed blue line and the shaded region represent the mean ratios and range of ratios for comets with typical carbon composition as defined by A’Hearn et al. (1995). The red mark in a few panels represents the corresponding measurements from the spectroscopic observation. The error bars correspond to the 1σ absolute errors.