Synchro Compur Shutter: Testing Flash Contact Efficiency
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
As part of the intake process on all shutters, I check contact efficiency and insulation of the flash circuit. After repairs these figures are checked again. Most manufacturers specify a contact efficiency of 60% or higher and an insulation of at least 7 megohms. This Synchro Compur shutter passed both tests easily. The shutter still needs a cleaning/lubrication.
