Image Quality

Recent measurements indicate that .70'' fwhm images have been observed with the PFADC in the center of the field under very good conditions of seeing. These images are undersampled because the CCD currently used has a scale of .43"/mm. At present we are unable to determine if the actual image size is smaller than this reported value.

This observation implies that with perfect seeing the PFADC is probably capable of producing central images with D70 well under .5''. The images are clearly very good, though we are unable to measure how closely the central images approach the level of D70 < .25" that theory predicts they should.