NavList:

Frank,
> The critical step
> is adjusting the focus of the telescope

I will try this when I come back to Lafayette.
If I find a 500 ft testing range in this
overcrowded little city:-)

BTW, I checked several level like this on the e-bay
and one advertisement says that "it creates a dot-spot of light
at 300 ft distance". You were talking of 500ft.
Are there levels of different quality?

Can you invent a good arc uniformity test using a laser beam?
I tried your other test, for the drum excentricity,
with lines of computer
screen,
but with no conclusive results: the testing range in my appartment
is too short, and I was lazy to make an arrangement
with fixing sextant and computer outdoors.

Alex.


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