20x view of my 3.1" Discovery secondary. The area shown is about the center, the pinholes get worse towards the outer edges. This secondary has enhanced coatings and was purchased new in Oct 2004. As I have nothing to compare with I don't know it this is average for enhanced coatings. The pinholes can not bee seen without magnification. I'm having it recoated with standard coatings as I'm also having my primary refigured and recoated.