new clusters

To me that is. Also gives an idea as to the difference in seeing and therefore effectiveness of guiding on two consecutive nights. I tried to keep the processing the same on each.

Also a chance to debug the latest zwo SDK native and with the INDI driver under phd2, the latter looking good so far.

And, try out Siril's photometric star colour calibration.

distance: 3700 ly RMS 0.8

open cluster ngc559 in cassiopeia
700d on nt150s    37x240s @ ISO800

distance: 3900 ly RMS1.9

open cluster ngc744 in perseus

700d on nt150s    34x240s @ ISO800