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Frequent Contributor
Posts: 41
Registered: ‎10-26-2014
Accepted Solution

Slow buffering when shooting high burst mode with my 7DMarkii.....what is the fastest SD card?

When shooting high burst mode with my 7D Mark ii, I am not getting optimum performance...the buffer fills fast and backs up ..so that I can't take any more shots...I have turned off the High NOise reduction setting altogether...I usually only have an SD card in the camera. I don't use the other card slot....is it because I didn't have the fastest SD card....For those of you who regularly shoot the 7D Mark ii, do you make a point to always shoot with a SAndisk SD 95 card...? Would i get better performance if I used the CF card slot or both?

 

Reputable Contributor
Posts: 596
Registered: ‎11-14-2012

Re: Slow buffering when shooting high burst mode with my 7DMarkii.....what is the fastest SD card?

Swedish, but you will understand the write speed http://kameratrollet.se/2016/01/15/vilken-hastighet-pa-minneskortet-till-canon/

7DII has around 103 MB/s for CF and 75 MB/s for SD. Buy a fast CF card and don't save raw to both CF and SD at the same time to get the best performance.
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Esteemed Contributor
Posts: 2,050
Registered: ‎11-14-2012

Re: Slow buffering when shooting high burst mode with my 7DMarkii.....what is the fastest SD card?

The old saying speed costs money is true here. I shoot fast paced action with a 7D2 & shoot large fine jpg + RAW to both cards & I think I've hit the buffer's limit ONCE, but I may have just stopped holding the shutter button down far enough too. Other than that single time all bursts have been within the limit. My 7D2 can fire longer than my 1D4 & both use top of the line (when bought) Sandisk cards. The CF's are 90 MB / s, or the newer 160 MB / s versions Extreme Pro & the SD cards are 95 MB / s

"A skill is developed through constant practice with a passion to improve, not bought."
Frequent Contributor
Posts: 45
Registered: ‎06-28-2013

Re: Slow buffering when shooting high burst mode with my 7DMarkii.....what is the fastest SD card?

I had the same problem when I purchased my markII. Solved it by buying a 64 gig sd card.

Esteemed Contributor
Posts: 3,026
Registered: ‎06-25-2014

Re: Slow buffering when shooting high burst mode with my 7DMarkii.....what is the fastest SD card?


tinwhistle wrote:

I had the same problem when I purchased my markII. Solved it by buying a 64 gig sd card.


I strongly suspect that the solution to your problem stemmed from the speed, not the size, of your new SD card.

Bob
Boston, Massachusetts USA
Respected Contributor
Posts: 1,462
Registered: ‎02-26-2015

Re: Slow buffering when shooting high burst mode with my 7DMarkii.....what is the fastest SD card?

[ Edited ]

Your best performance will be with a fast CF card writing to that card.

From cameramemoryspeed.com

7d mem.jpg

7d mem 2.jpg

Frequent Contributor
Posts: 41
Registered: ‎10-26-2014

Re: Slow buffering when shooting high burst mode with my 7DMarkii.....what is the fastest SD card?

I havealways used only the SDcards....what is the rational  for the CF...what can the CF do that the SD card can't ....?

Frequent Contributor
Posts: 41
Registered: ‎10-26-2014

Re: Slow buffering when shooting high burst mode with my 7DMarkii.....what is the fastest SD card?

I am shooting with one card (SD), a Lexar pro 64 GB 150Mb/s Class 10  and 3 inside the U (whatever that means)  but I show a 16 limit burst on my screen....so I don't get it...I'm shooting a low ISO....I have the noise reduction turned off....I"m shooting a Standard picture style......I'm shooting RAW only...My battery is loaded......So why is it backing up and buffering so often   ?? Have I forgotten something? .is it just that the CF card is faster? ....I doh't understand why I"m not getting the promised high perfromance of 20 + something shots burst ...

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Respected Contributor
Posts: 1,462
Registered: ‎02-26-2015

Re: Slow buffering when shooting high burst mode with my 7DMarkii.....what is the fastest SD card?

[ Edited ]

iris wrote:

I am shooting with one card (SD), a Lexar pro 64 GB 150Mb/s Class 10  and 3 inside the U (whatever that means)  but I show a 16 limit burst on my screen....so I don't get it...I'm shooting a low ISO....I have the noise reduction turned off....I"m shooting a Standard picture style......I'm shooting RAW only...My battery is loaded......So why is it backing up and buffering so often   ?? Have I forgotten something? .is it just that the CF card is faster? ....I doh't understand why I"m not getting the promised high perfromance of 20 + something shots burst ...


First yes, CF cards are faster.

 

Second, the number you see is the actual buffer, and doesn't include the write speed of your card.

 

So the only way to tell what your actual burst capapbility is, is to test it. 

 

Shooting RAW to a SanDisk Extreme PRO 32GB 160 MB/s UDMA 7 CF Card, I get about 30 shots before the burst slows. My viewfinder shows 15.

 

Note, when testing your cards burst capability set your lens to Manual Focus (MF) because depending on your focus priority settings the camera auto focusing can slow or even interrupt your burst.

Reputable Contributor
Posts: 596
Registered: ‎11-14-2012

Re: Slow buffering when shooting high burst mode with my 7DMarkii.....what is the fastest SD card?

[ Edited ]

iris wrote:

I am shooting with one card (SD), a Lexar pro 64 GB 150Mb/s Class 10  and 3 inside the U (whatever that means)  but I show a 16 limit burst on my screen....so I don't get it...I'm shooting a low ISO....I have the noise reduction turned off....I"m shooting a Standard picture style......I'm shooting RAW only...My battery is loaded......So why is it backing up and buffering so often   ?? Have I forgotten something? .is it just that the CF card is faster? ....I doh't understand why I"m not getting the promised high perfromance of 20 + something shots burst ...


What was wrong when I wrote "7DII has around 103 MB/s for CF and 75 MB/s for SD"?

 

It doesn´t matter if your card has a write speed of 150MB/s or of 1000 MB/s. You will only get around 75 MB/s with a 7DII together with a SD card.

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My Swedish blog

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