I have a Pentax Compatible TTL Centon FG105D Flash which works fine on the camera hot shoe. In fact, I'm surprised how well it works: Changing the focal length on a zoom will automatically adjust the motorised flash zoom, the aperture information is transmitted, etc. Shame that my K100D cannot make use of the flash's TTL functionality.
Here's the problem: I just got a
Cactus V4 radio trigger set and it works without problems with my Vivitar flash.
The Centon, however, must be one of those flashes which are not compatible with radio triggers. I cannot make it fire by shorting the main hot shoe pin with the side contact (works with the Vivitar).
Does anyone know how such flashes are triggered by the camera if not by shorting the main hot shoe pin with the side contact?
Does anyone have an idea how I could modify the flash so that it can be triggered by the radio triggers?
Unfortunately, the Centon doesn't have an additional trigger socket. If everything else fails, I might try to add such a trigger socket that will connect to the test button of the flash. That may not work though, as someone has found while
modifying their Sigma EF-500 DG which cannot be triggered the normal way either. In the case of the Sigma flash, using the test button introduced an unacceptable delay.
Last edited by Class A; 10-25-2009 at 02:30 PM.