Thanks for your response Greg

>artificial star that's relatively near your scope, use a small target. A
>small ball bearing should work admirably at your distance. The important

This was the part I was not sure about,At present I have a 1 inch ball
bearing available.
These are no problem here as there are Engineering factor stores locally
that can sell me bearings in 1 0ff quantity for pennies at any size I need
up to inches in diameter.

>consideration is whether or not your LX-200 will actually focus at that
>distance. All I can say is that my 10" f/6.3 LX-200 will focus
>considerably closer than that (it definitely will focus on a target at
>approx 40')

yes my 12 inch Lx200 should do that as well...




> One caveat: I deliberately avoided using the most easily available
>spherical reflector, viz., a small, silver Christmas tree ornament. I took
>one look at a small ornament I had (I was originally going to use it, in
>fact) and decided it was a waste of time using a second-surface mirror for
>these purposes. I can't tell you how one would work because I don't know.

I have boxes of these all sizes some very well made but I balked at hanging
one of these up on the mast as the neighbours think I am one short of a six
pack already(no comments please)

>for those who need to use a scope-mounted laser for collimation: A good
>time to do it is when you set up your scope at your dark site. The
>diffraction rings generated by the laser are much more easily seen at
>twilight and later. In addition, I think anyone who does this will be
>surprised at how much the laser beam spreads in getting to a target 150'

I agree here the laser is a bit of a minefield,I looked them up in
electronic catalogues and found over twenty different types .They vary in
power levels,beam spread all sorts of things but again beam width did match
the price as the better narrow beam low spread ones ended up very expensive.

Greg Hartke
Sykesville, MD

Thanks again for your input Greg

Brandon S. Jones

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