How exactly do you centre the artificial star/ target in the scope with the
OTA lying on a table or whatever -especially if the target is 150' away?
And how do you know when the halo is focused well enough and when it is
centred on the target? My finder scope wasn't useful for this at 50'. I
can't see that a pair of 10x50 binocs. are going to allow you to accurately
centre the halo.

Tim,
I just walked back and forth until I got it right but an assistant would be
helpful for this. I used small sand bags and duct tape to hold it in
position but I heard others say that they made a wooden cradle. Bottom line
is that you really need to see (up close) what is going on and the best way
is the walking.
Doug
Thanks for responding.

Tim deBortoli
Elliot Lake, Ontario

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