l1 = 68mm
y1' = 73mm
deltaX' = 102 mm
y2'=38mm
l2 = 87mm
deltaX = 19mm

Abberation
h(10) = 0mm
h(20) = 1mm
h(40) = 3mm
h(diameter) = nonius_mm

Chromatic abberation
(Red) = 0.2mm
(BLue) = -0.3mm