I wondering if thee might be something funky with this flash unit, I've noted on a couple of occasions that the camera has seemingly stooped responding with the flash unit attached, with the dials no longer affecting the shutter/aperture settings when rotated, with the camera needing to be switched off and on to come back to life. And I was just out in the garden taking some shots on fully manual, and I noticed there seemed to be a noticeable difference in a series of three pictures, with them getting darker one after another, and then noticed the aperture had changed from f18 to a triangle followed by f7. And it wouldn’t change until I turned the camera off and on, and the camera had recorded no aperture or focal length information on those pictures.
I've given the connectors a clean with a micro fibre cloth, is this anything anyone else has encountered?
Thanks again