06-14-2018 08:50 AM
Sorry for warming this old thread up, but could anyone resolve this problem? (Encounter it myself with a 5DmkIV and a brand new SL600ex II rt)
Can you give us some more details of what you've tried and the results you've gotten? The OP's problem was never easy to follow and seemed inconsistent. (For example, what made him think the flash was firing at full power, given that the pictures were coming out black?)
Also, is this your first experience with ETTL flash, and have you read some of the other recent threads in the "Speedlites" subject area?
06-14-2018 10:19 AM
to quote the OP, in what i think was quite consistend in regards to the circumstances:
When set to ETTL the images are without flash impact (the flash goes off BEFORE the exposure is starting) - despite there is flash triggered.
In all other modes - Manual, EXT-A, EXT-M - the images are totally overexposed, white-out.
The 600ex-II-rt is out of the box new, factory settings! Tried it on a 5DmkIV, 5DmkII and M5.
12-03-2018 12:18 PM - edited 12-03-2018 02:14 PM
Have you dialed down the Flash Exposure Compensation?
On the back LCD, just below where it says "ETTL" in the upper left corner, it might show an icon with a lightning bolt and a +/- followed by a number. If the flash exposure compensation is not set (basically it's set to "0") then it wont show that icon nor the value, but if any flash exposure compensation is set, you'll see the icon and the value that it's set to.
The press the +/- button along the bottom (on menu page 1) and you can dial it back to 0 (if indeed that is what happened.)
It's also possible to change it in the camera.
But what I don't get is why changing the mode to manual and dialing down the power to 1/128th would result in firing at full power. That might require service (or at least a phone call to Canon service to ask questions.)
it seems that no power regulation - automatic or manual - is not working. It's a holiday today, but I will contact my nearby Canon support tomo