Figure 8: A focus run centered upon a typical focus value (4800) with a reasonable step size (-20).

cl> observe
Exposure type (|zero|dark|object|comp|pflat|dflat|sflat|focus) (object): focus
Exposure time (0.:) (3.): 9
Title of picture (test field V): V focus frame
Number of focus exposures (7): 
Middle exposure (number 4) of sequence to have Focus value (4800.): 
Focus increment (-20.): 
Filter in wheel one (V): 
WIYN command - 65a1 filter position move 2 
Got filter move completion from FSA 2
Setting shutter mode to normal
Got filter move completion from FSA 2
Filter1 = V         
WIYN command - 65a5 telescope focus move 4860.00000 
Now Moving secondary to 50 microns
..... focus = 4860.00000
First focus exposure finished...
WIYN command - 65a6 telescope focus move 4840.00000 
Now Moving secondary to -19 microns
..... focus = 4840.00000
...additional focus exposure finished...
WIYN command - 65a7 telescope focus move 4820.00000 
Now Moving secondary to -20 microns
..... focus = 4820.00000
...additional focus exposure finished...
WIYN command - 65a8 telescope focus move 4800.00000 
Now Moving secondary to -20 microns
..... focus = 4800.00000
...additional focus exposure finished...
WIYN command - 65a9 telescope focus move 4780.00000 
Now Moving secondary to -20 microns
..... focus = 4780.00000
...additional focus exposure finished...
WIYN command - 65aa telescope focus move 4760.00000 
Now Moving secondary to -20 microns
..... focus = 4760.00000
...additional focus exposure finished...
WIYN command - 65ab telescope focus move 4740.00000 
Now Moving secondary to -20 microns
..... focus = 4740.00000

REMINDER: The double space marks the beginning of the sequence!