Observed optical line profiles of NGC 2392 (black) compared to predicted line profiles from four different models. Colors indicate different stellar and wind parameter sets, while dash styles indicate different clumping factors. The colors correspond to: the consistent model of P04 (P04, red); a model using the stellar parameters of K06 with mass loss rate and terminal velocity artificially set to the values given by K06 (K06f, green); and one using the stellar parameters of K06 and wind parameters consistent with those stellar parameters (K06c, blue). Solid lines indicate models using the clumping factor suggested by K06, the dash-dotted line indicates a model using the clumping factor redetermined in this work.