8"f/4 parabola, Banerjee numbers.
200.0             Primary diameter, mm.
caustic
1600	=> fixed source.
zone,	X,	Y,	all mm.
17	1600.53	-0.004
33	1602.04	-0.028
50	1604.69	-0.098
67	1608.43	-0.236
83	1612.96	-0.449
92	1615.94	-0.611
