Re: Pole master on G11 with Digital Drives
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Finally, I find that the target circles in my Polemaster display are not perfect.? When the pattern is matched as well as possible, one or two stars might be on the edge of a circle or even slightly outside it.? I just adjust for best overall pattern match.?
yep - it's due to the distortion and somewhat imprecise polemaster camera/lens - and why we have circles and not dots to align the stars :)
but you nailed it. get it as close as you can, averaging out all the stars
that's why polemaster is at most 30arcsec accuracy. it just has some imprecision in there?
On Sun, Dec 20, 2020 at 5:44 AM Paul Goelz < pgoelz@...> wrote: On 12/20/2020 1:02 AM, Tom & Barbara Coverdale wrote:
> My initial alignment was using my iPhone sitting on my level tripod
> point at due N and then I used my?green laser to check that?everything
> was?aimed at polaris. GM-8 set to 36 degrees (I am 90 miles N of LV). I
> guess I could have checked with my scope if I was on polaris but what a
> PITA!! I'll keep trying tomorrow night.? Tom
What's the chance that metal in your tripod caused an offset in you your
iPhone compass and you were in fact not pointing due north?
Or more likely, the magnetic deviation for LV is 11.41 degrees east,
which is almost the FOV of the Polemaster.? If you were pointed "due
north" without compensating for magnetic deviation, Polaris might not
have even been in your FOV.
Finally, I find that the target circles in my Polemaster display are not
perfect.? When the pattern is matched as well as possible, one or two
stars might be on the edge of a circle or even slightly outside it.? I
just adjust for best overall pattern match.? I have not tried turning on
refraction correction, but I am at latitude 42 so probably doesn't make
too much difference.
Paul
--
Paul Goelz
Rochester Hills, MI? USA
pgoelz@...
-- Brian?
Brian Valente portfolio
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