Ran the calibration print .. came out GREAT!! It prints 8 of the same object and you can adjust the exposure time for each print. Default starts with a 5 sec exposure and advances 1 second so you have 6 seconds for the second, then 7 seconds for the third all the way to 12 seconds for the 8th. You then examine each print very VERY closely to see which exposure time is best for THIS particular resin and then you set that time for that resin. Tomorrow .. I will use my macro lens on my camera to get up close and personal.