To get a good idea of the overall sharpness of an image/seeing conditions, several stars across the field of view were analysed in MaximDL and this particular star
revealed a FWHM of 1.665" (arc sec) which was about the average of those measured, with the best result, of the several non flat-topped stars analysed, across multiple
sub frames, a very sharp 1.518". These sort of readings were seen across multiple hours of capture time across two different nights, not just for short periods.