Heres my first stacking attempt using PS using a tutorial found at
www.rocketroroberts.com/astro/calibration.htm . Unfortunately its a rush attempt due to uncanny cloud interfernce and uncomfortable scope positons ......details
1.Eta carinae/keyhole nebula at F/6.3
2.5x 140sec stacked in PS and dark frame calibrated
{must admit i prefer wider frame shots of the neb}