5D Mark IV SD Cards

I have looked and can't find what I'm looking for. I just got a 5D IV and all of my previous SD cards take about 6-8 seconds to write the image. I ordered a new SanDisk Extreme UHS-1 Card: https://www.amazon.com …age_o02_s00?ie=​UTF8&psc=1

I read that the Mrk IV only works with UHS-1 cards and will only write USH-2 cards at 1 speed.

So I tried the new cards and am getting the same results. I tried full size RAW and small JPG images and it still takes about the same amount of time to write the image to the card. When I take a picture, I get the BUSY indicator for about 6 seconds, if I continue to shoot, it stops after the 3rd image.

Anyone had this problem and know how to get around it?

Thanks in advance.

Something is clearly wrong! I don't own a 5DIV but the manual (page 171) says you should be able to fire off 17 images in burst with a standard SD card and 19 with a high speed card. You are essentially stating you can't even do a burst mode. Is this occuring with the new card you have ordered or hasn't it arrived yet?

Make sure you do a low level format on any card you are using. Then I think you should do a firmware update. Strange behavior does occasionally get corrected by a firmware update or rewrite. The latest firmware just came out a few weeks ago (03 April 2018) and can be found at https://www.usa.canon.​com …-iv?tab=drivers_downloa​ds.

Reset all the features to factory default. Certain features will really lower the buffer and burst rate. On a 5D4 you should get SD performance similar to below:

Lexar Pro 633x UHS 1 SD 18 shots 12.1 seconds to clear buffer
Lexar Pro 400x SD (non UHS) 16 shots 24.4 seconds to clear buffer

cristphoto wrote in post #18611184
Certain features will really lower the buffer and burst rate.

It might be beneficial if you posted one of those images that took 6-8 seconds to write. Just make sure the EXIF info is intact. That way we can see what settings have been used.

Don't by the way get the impression that the Lexar cards in the previous post are the answer to your problems and go buy Lexar. They are great cards but you have something else going on. The Sandisk card you linked to is fine, although there are many counterfeit cards in the online marketplace.

So, I couldn't figure out what was causing the problem so I reset all settings and everything is fine now.

ShotByTom wrote in post #18613614
So, I couldn't figure out what was causing the problem so I reset all settings and everything is fine now.

I'd take a "slow" image and an image after your reset and carefully compare the EXIF. That might providea good indication of the former problem.

You might have had HDR mode inadvertently turned on.

Same thing happened to me with my 5D IV which made a frustrating first outing with a new 100-400 II. It had to be something with the camera because I knew my cards were more than fast enough.
Check to make sure you don't have lens peripheral illumination correction turned on. That's whats got me.