Mick wrote:

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.

Hmmm, I'm not sure I get it. Ok, at 200, Mars should look like 1 defree, double
the size of the moon with unaided eye. I.e. it will appear the same size as
the moon would appear at magnification 2X in the eyepiece.

- Alex