FWHM of the comet tails as a function of distance from the nucleus. The error bars are 3σ uncertainties of the tail width computed from the Gaussian fits. The coma positions are marked with vertical dotted lines for each camera. The embedded images are composites of the HI-1 and LASCO/C3 images from which the widths are measured (dust widths are from LASCO/C3 and plasma widths are from HI-1). Scale bars on the images are 1 Mkm at the comet.