Paul LeFevre wrote:
> Why would the distance from the scope matter?? Light scatter?
The light seems to be reflected back along the beam, rather than
scattered randomly. Visibility is critically dependent on dust or
moisture in the air; on a perfect night at Yosemite, the pointer was
useless. I could barely see it, even directly behind it.
-- Jim Van Nuland, San Jose (California) Astronomical Association <a href="http://www.svpal.org/~jvn/ ">JVN's web site</a>