topic Re: 430ex 3 not firing focus beam on new 5dmk4 in EOS DSLR & Mirrorless Cameras

430ex 3 not firing focus beam on new 5dmk4

echelonphoto — Wed, 29 Mar 2017 15:46:44 GMT

Got new mk4....my focus beam on the 430ex 3 is not firing...it will fire on my 6d's. I did check the menu to indicate that af assist beam is enabled.

kvbarkley — Wed, 29 Mar 2017 15:56:40 GMT

Which menu? The mk4 or the flash?

echelonphoto — Wed, 29 Mar 2017 17:48:06 GMT

I did both menus...as I said...it fires fine on my 6d's. Now I did try my laso transmitter on the mk4 and that fires the beam no problem.

kvbarkley — Wed, 29 Mar 2017 17:49:23 GMT

I suggest you call Canon.

TTMartin — Thu, 30 Mar 2017 21:53:10 GMT

The IR AF focus assist beam will only activate when in One Shot, it will not activate in AIServo.

The IR AF focus assist beam will only activate when the camera can not achieve focus without it.

echelonphoto — Thu, 30 Mar 2017 22:11:56 GMT

It seems that it will not fire if you are using the precision focus point...also does not seen to fire if the focus point is not in the center.