Originally posted by Si1maron I don't remember the K-x having a X-sync port, only the hot shoe, and I used exclusively the hot shoe with wireless synchroniser, with sb25, and well, the built-in.
I remember that there is this little nub on the hot shoe, can it be a problem?
I don't see an answer to your question.
I don't believe it is relevant, but deserves a response.
When I purchased my first 35mm camera in 1969, it had only a "cold shoe" on the top {right below the word "Yashica"} which supported the flash unit {a
bulb unit} and provided a single electrical contact.
The other contact came from a "pc" cord plugged into the side {into the socket marked "X"}
A "hot shoe" developed from this.
At first, the middle of the "cold shoe" became an insulator, with a small conductor to provide the second contact,
and other contacts were imbedded in the insulator for other control signals.
If the flash unit is not aligned correctly, the center contact on the flash won't align properly with the center contact on the camera - and no flash at all!