Observing with an image intensifier

I had the opportunity to pick up at auction a Zenit NV-100-1 Gen I image intensified scope for $75. My intent was to interface the image intensifer tube with my Connectix B/W Quickcam for better DSO imaging on my 8" F/6 Dob using 2-3 second exposures. However, I couldn't resist connecting the little scope (minus the objective lense) to a 38 mm Erfle (Rini eyepiece) I had in my collection for some visual comparison. I left the little scope eyepiece intact (4.3 x magnification) which yielded a net magnification with the Rini eyepiece of roughly x138 when plugged into my big scope. I compared M13 visually against my UO 16 mm konig coupled with a TV 2x barlow (x152). Comparisons were made from my backyard with considerable light pollution (not ideal). I was struck with the fact that the intensifier produced an extremely bright image of the cluster with individual stars resolved right to the core on immediate viewing. Without the intensifer, you really had to study the cluster awhile and use averted vision to see individual stars resolved. Will hopefully have some images to show you soon.