ATM Artifical Star testing.

[Rick Maillet <bucko_62@yahoo.com>]

Here is the report....

I did artifical star test on my 10" F-6 not perfectly
spherical, (at the moment)mirror lastnight.
I used a 12.5mm eyepiece.
image remained nice and round throughout testing.

Question is....
I did not see rings like those seen in pics of star
tests with parabolic mirror.
my image was evenly grey through out, except for a
brighter area out at the edge(outside of focus).

I assume this is how things are suppose too look,and
the bright ring outside of focus is a result of my
raised edge zone?

does this sound right?

There is no sign of astigmaitsm as far as image is
concerned anyway,thats the good thing,but am I suppose
to see rings in this image or is it right to see the
greying since it is close to sphere but not
parabolized.
                                          Rick

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