2.Use the RSI ray for the upper marginal ray for field 2 to determine the obscurations 4rrR;V"}
on surfaces 2 and 3 (Hint: look at the ray height on S5). These obscurations make a 3H,?ZFFGz
hole in the corrector to prevent the light from passing through the corrector lens Usq.'y/o
twice. -T{G8@V0I
)SyU
3. Use a targeted ray for the negative full field to hit the edge of the obscuration on
M<