>>>
?if guiding is working correctly, should periodic error beyond fractional arcseconds even be visible?? As an experiment, I increased the RA aggressiveness from 70% to 90% and things got better.?
>>
?tonight was the only time I have actually had oval stars.???
Eccentricity (star roundness) really depends on how close RA and DEC RMS are, not necessarily how high is your RMS
On Thu, Dec 10, 2020 at 7:36 PM Paul Goelz <pgoelz@...> wrote:
On 12/10/2020 10:25 PM, Brian Valente wrote:
> the gemini II built-in pec is really more designed for visual - one
> cycle, no multiple passes, no averaging.
>
> you also have a lag there between observed movement and reaction so you
> will always be a tiny bit behind
>
> i really recommend you save yourself grief and give PEMPro a shot - they
> have something like a 45 or 60 day trial period
Thanks Brian, that makes sense.? Too bad the G2 does not average
multiple sessions though.? I can certainly try PemPro on a trial basis
but I'm afraid that I find the purchase cost of $149 excessive.
On a side note.... if guiding is working correctly, should periodic
error beyond fractional arcseconds even be visible?? As an experiment, I
increased the RA aggressiveness from 70% to 90% and things got better.
Again, it is not excessive at all and tonight was the only time I have
actually had oval stars.? Mostly it does not seem to be affecting my
images.
