[QuadList] Cronkite's first half-hour newscast... count the tape roll ins

[Dale Lamm]

[snip]

Chris...
I'm assuming the TK-41 has an iris servo?  I never got to work with one,
sadly!
Guy

[end]

A glorious Selsyn device with a real, live mechanical iris (not a gradient 
wheel) in the optical path before the dichroics. The shader could actually 
feel when the iris hit either stop, because the knob on the CCU would resist 
his/her finger motions.