Here's Dave Johnsons awesome display of camera tubes.
And Peter Yanczer demonstrated scanning disc and mirror screw sets.
It was hard to get a good shot of the mirror screw image with a digital camera or a video camera. Maybe someone got a better one? Seeing this in person was a thrilling experience.
Peter Fasciano talked about 100 Years of Test Patterns and China Dolls and the amazing restoration work he performs to bring the old test patterns back to their original glory.

And Darryl Hock gave the group an update on the ongoing evolution of his "NTSC-to-Darn-Near-Everything" standards converter.