[Dave_s]

Dave,

Thanks for your thoughts. It’s definitely something similar to the familiar refresh-related issue, only different. As I noted in my original post, no setting of the variable shutter in my camera would elminate it. I’m guessing that since the color-sequential “scanning” of a single-chip DLP projector is very much a different animal that the scanning of a CRT monitor (more like the short-lived CBS field-sequential color system than today’s NTSC dot sequential system), the ClearScan-type adjustments simply weren’t designed to deal with it. We’ve all been spoiled with the near-ubiquity of no-scan LCD panels and projectors which have pretty much relegated the old refresh incompatiblities issue to history. This particular situation was a surprise to me!

I believe that these scanning wheels operate at the nominal 60 hz video rate (or multiples therof), and that might explain why no setting on the variable shutter improved the problem beyond the picture obtained with the “stock” setting. But something unpleasant was happening that I haven’t been able to figure out yet.

Still wondering if anyone else has noticed this effect and possibly figured a workaround?

Thanks!