Originally posted by Danny Delcambre No, it is 50 watts. It is Vivator DF283 Pen Series 1. Am I right?
I though you were referring to the old 283 Vivitar from the 80's.
I suppose you mean 50 volts and not watts. If that's true, then it is still way too high for the hot shoe on a digital camera. Typically the upper limit is around 5 or 6 volts, although Pentax may support higher voltages, but 50 is way too high.
The best way to know for sure is to turn on the flash without connecting it to the camera and measure the voltage with a volt-meter from the center pin in the shoe (positive) and the side of the shoe groove (negative).