Dean Salman <cluster@...>
I have been wanting to get the PE in the mount but I can't seem to
get it working, I wonder if it is because I am under sampled. I kind
of gave up since I can do 20 second exposures ok.
--- In ap-gto@..., "Ray Gralak" <rgr@...> wrote:
(not only did I reduce PE but I made it artificially higher fortesting by
loading an appropriate PE curve). Using a 5-second autoguider cyclejust by
turning on PEM reduced FWHM by 0.15 arc-seconds when going from 3.0arc-sec
PE to 0.5 arc-sec . The stars looked just as round in each case,but the
FWHM of the stars with PEC on were tighter.SBIG camera,
good PEC is critical. It will allow you to increase the autoguiderexposure
time to get a guide star through the narrowband filter.