Originally posted by rawr The little screw-in cap is just to weather seal the PC sync socket when not in use. It's not meant to form part of any PC sync cable.
My point exactly, thank you. There is a standard; Pentax chose not to use it.
Originally posted by Arjay Bee But does your connector make contact without being screwed in?
Of course. It is compatible with both screw-in and older style non-screw-in. That's the point. The screw-in PC connector is not a new-fangled invention; it's been there for many years. And since Pentax decided to use a weather sealing cover over the PC socket, then why *not* use a connector that already has threads?
By the way, the way of the future is in the Yongnuo flashes that perform extremely well, well above their price point. They are a wireless flash, certainly, but they have a PC connector, too. And instead of just sloughing it off as a checkbox item, it has a screw-in PC connector. Basically, if you are *going* to use a PC connector on a new device, there is no excuse *not* to use the screw-in type, because they accept the old PC connectors, too.