RAW image field correction test on a TI45 f/4

M106 field. A very good raw test on a TI45 f/4. Single 90 sec, unguided, uncalibrated frame, taken with a KAF16803 (37 x 37 mm CCD sensor). Sky was medium-bad (SQM about 20.1, Poor seeing about FWHM 2,6″).