EOS 5D Mark IV AEB and Slow High Speed Shutter Buffering

[wrecktech]

I am trying to take some AEB brackets with five (5) images, (-2, -1, 0, +1, +2)  with high speed shutter.

When I press the shutter button, the camera immediately starts buffering, my 0 Exposure is 1/500s @ f/8 & ISO400 in decent sunlight. It takes about 5-8 seconds for the series to run. I get the same issue with recording to either the CF or SD card. 

Lately when I'm using Lightroom to import the images from the card, I get an out of space error and the process stops. I've reformated both cards in the camera and have over 1 TB free on my SSD where the files are going. Should I reformat the cards on my Windows PC? If so, what settings? Quick format or something else?

Where am I going wrong?

5D Mark IV, Sigma 50mm Macro, Sandisk Extreme Pro 64GB SD 200 MB/s, & Sandisk Extreme Pro 64GB CF 160 MB/s

[deebatman316]

Have you tried using a different memory card. Also I’m pretty sure AEB must be used with Single Shot not continuous drive. Are you using a speedlite if so what model are you using. When I do use Flash Exposure Bracketing it states this.

[Waddizzle]

I use AEB with Continuous Drive quite often.  If you use the built in 2/10 second delay timer, then the camera will automatically execute the entire sequence.  

[deebatman316]

I usually use Flash Exposure Bracketing (FEB) and that does have that limitation. The flash doesn't fire or the camera automatically cancels Flash Exposure Bracketing (FEB). I wasn't aware that wasn't the case for AEB.

[Waddizzle]

I would venture that flash recharge timing as the most likely reason why automatically firing the entire sequence is not available for FEB. 

[deebatman316]

FEB is ONLY supported on Canon's top of the line speedlites such as the 550EX, 580EX, 580EX II, 600EX/ 600EX-RT, 600EX II-RT, EL-1, EL-5, MR-14EX, MR-14EX II, MT-24EX & MT-26EX-RT. But no other speedlites support this even the 420EX & 430EX series, 220EX, 270EX series, EL-100 & EL-10.