Focus Positions for the Four-Color Bolometer

Relative to 1300 microns, the Z and X focus positions are:

	870 micron: add .19 to Z, subtract .41 from X
	450 micron: add .24 to Z, subtract .39 from X
	350 micron: add .30 to Z, subtract .34 from X

   Based on the 11 Mar 97 measurements of the 1300 micron's focus, the offsets
would be:

	1300 micron: Z=-0.77  X=0.46
	 870 micron: Z=-0.58  X=0.05
	 450 micron: Z=-0.53  X=0.07
	 350 micron: Z=-0.47  X=0.12

   The focus positions are set by telling OBST, CORRECTIONS * * <z> <x>