At present Mars should be over 1/2 degree at 100 X's, which is a full
moon
disc. At 200 X's, Mars should appear
as the moon would at 100 X's.

Surely you mean "At 200 X's, Mars should appear as the moon would at 2
X's."
Check your math.

This just doesnt happen because the moon
takes up the whole field in the EP at 100X's

So there is some optical trick occuring that eludes me...


What I mean is, at 100 X's Mars is to appear as the moon does unaided. The
two are supposedly equivalent. (1/2 degree)
Now, if you up the anti to 200, Mars should be equivalent of what the moon
would appear to be at 100 X's....in the EP.