Leginon

When a retractable camera retract, it needs to release shutter control in case there is another camera below it. When there are multiple cameras from the same manufacturer and are shuttered through the same control, this is usually o.k. but not when from different computer as there is no communication between them.

Leginon situation is further complicated by that we pretend different K2 modes are different cameras.

Simple solution is to blank the beam before start of the exchange, but gun deflector used on JEM3200 is slow. It is best not to do it often.