# The slit width will automatically be set to 1.05" and the exposure type will switch to HARTMANN, then the GUI will grey out and not be available during the focus sequence (although you will see the ''Current Camera Focus'' field changing and the Hartmann shutters indicate ''Moving''.
# On completion of the sequence: in the SpUpNIC Quick-Look GUI, in the log box to the right of the spectrum display window, you will see a list of focus positions and their corresponding pixel shifts. Best focus corresponds to a shift of zero.
# The camera focus should automatically be set to the best focus value, but if it isn't, enter the best focus into the ''Requested" '' Camera Focus box on the SpUpNIC Control GUI's ''Instrument Setup'' pane and click ''Go''.
* The Hartmann sequence ends with the shutter out of the beam, but be sure to select the desired slit width in the ''Instrument Setup'' pane and click ''Go''. Check that it goes to the required position, click ''Go'' again if it does not do it the first time.
* Select "Exposure type" = ARC and take an arc to confirm that the focus looks good.