Chris,
Seeing that the moon is only 250,000 miles distance and the star
was at least 2 light years away and a point source of light, I certainly
hope you had to re-focus a bit. No worries mate!

john
Willard Observatory
(Not far from Mt. Palomar)
http://members.aol.com/rlecker/optas.html

>I really strange thing happened to me the other night. To get a rough
>focus I
>focused my 10" LX200 on one of the Moon's creators, the Moon was about
>30 degrees
>east of the meridian. I then slued to a star about 60 degrees west of
>the
>meridian. To my great surprise the star was grossly out of focus. It
>appeared
>as a white circle with a black circle in the middle. It almost filled
>the FOV
>of my 12.5mm EP. It took four complete turns of the focus knob to
>focus the
>star. How could the focus have slipped so much?
>
>
>Chris Frye
>Silver Spring, MD

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