Strange problem here. My 420EX is firing when I press the shutter on my 20D, but the illiumination it is providing is not evident in the picture.
For example, in a living room at night, in M mode, at 1/125 s, f/4.0, without flash, the frame is dark. Same settings with the 420EX: still dark. In contrast, the on-board flash illuminates the scene just fine.
Same when trying to get fill flash in Av or Tv modes: absolutely no difference between the flashed image and the non.
The only thing I can think of is that maybe the flash pulse is out of sync with the shutter?
Posibly the flash firing that you're seeing is only a pre-flash. It may not be firing during the exposure.
Have you tried setting both the camera and the flash back to defaults?
I experienced this problem one time.. the preflash is firing but the exposing flash is not. It's probably a bad/loose connection between the flash and the camera.
this happened to me too ... $200.00 and 2 weeks at Canon later, everything works fine (it was my camera, not the flash).
:(
Originally posted by jmsetzler:
I experienced this problem one time.. the preflash is firing but the exposing flash is not. It's probably a bad/loose connection between the flash and the camera.
This might be a silly question, but is the 420EX actually firing? If not, then the bulb is out, if so, consider if it is in synch with the shutter relase. If not return.
