Radial and tangential full-width-half-maximum (FWHM) versus off-axis distance (in arcseconds)

Radial and tangential full-width-half-maximum (FWHM) versus off-axis distance (in arcseconds) based on H band images shown in Figure 1 (geminiann05014a). Black and red crosses are radial and tangential FWHM measurements (respectively) without the field lens and blue and green crosses are radial and tangential FWHM measurements (respectively) with the field lens engaged.