Originally posted by manybobs I'm looking at a 422d with PT 1d module on auction. Is the PT 1d a necessary item? If not , please tell me the advantages of having one.
The 422D requires a module. Most modules for other camera brands, except for the one for Nikon with special hot foot (the one on top of the rewind crank), will work with Pentax DSLR.
The only advantage of PT-1D (or PT-2D) is that if the camera is in Av mode (and probably P and green too, I'm not sure), when the flash is charged, it set the shutter speed somewhere between 1/50 to 1/180, depending on the lens.
I normally use either X or M. In those modes, the PT-1D does not have any advantage over other modules.