Jeff Cable's blog - 7D Mark II thoughts and high image .jpg

That writing cards issue totally bombs this camera out for me. It's an absolute pain in the 5D3 and if it's the same in the 7D2 then I Canon dropped the ball

Paulstw wrote in post #17210737
That writing cards issue totally bombs this camera out for me. It's an absolute pain in the 5D3 and if it's the same in the 7D2 then I Canon dropped the ball

They are not the same. The 5D3 SD slot isn't UHS-1.

TeamSpeed wrote in post #17210760
They are not the same. The 5D3 SD slot isn't UHS-1.

Is the 5D3 one a "High speed" SD slot? I know it maxes out around one.

TeamSpeed wrote in post #17210760
They are not the same. The 5D3 SD slot isn't UHS-1.

Cheers YO can tell I skimmed over the article and replies lol

Thomas Campbell wrote in post #17210792
Is the 5D3 one a "High speed" SD slot? I know it maxes out around one.

No it's not fast. It's a bit pants, in the pants dept where the only thing on sale is pants.

Thomas Campbell wrote in post #17210792
Is the 5D3 one a "High speed" SD slot? I know it maxes out around one.

The article says:
"And I was bummed to see that the SD slot is only UHS-I"

and Wikipedia says this about UHS-1:
UHS-I
Specified in SD Version 3.01,[20] supports a clock frequency of 100 MHz (a quadrupling of the original "Default Speed"), which in four-bit transfer mode could transfer 50 MB/s (SDR50). UHS-I cards declared as UHS104 (SDR104) also support a clock frequency of 208 MHz, which could transfer 104 MB/s. Double data rate operation at 50 MHz (DDR50) is also specified in Version 3.01, and is mandatory for microSDHC and microSDXC cards labeled as UHS-I. In this mode, four bits are transferred when the clock signal rises and another four bits when it falls, transferring an entire byte on each full clock cycle.

"High Speed" is relative, but really matters, is it fast enough to get the job done. How many burst shots are required and/or will it keep up with the HD video?

"High speed" was the limitation before uhs1, which was capped at 25 mb/s, which would make sense for the 5d3, since that was the max.

The speeds of the SD slot of the 5DmkIII isn't news. Yes, at any given time it will be slower then the CF slot (just as it was 1 or 2 years ago). Not that it would matter with the 7DII (which is a different camera). If you need the highest burst speed with the 5DmkIII, you just write to the CF card.

davesrose wrote in post #17211172
The speeds of the SD slot of the 5DmkIII isn't news. Yes, at any given time it will be slower then the CF slot (just as it was 1 or 2 years ago). Not that it would matter with the 7DII (which is a different camera). If you need the highest burst speed with the 5DmkIII, you just write to the CF card.

That's ok for Joe Public shooting down at the park, but when you're shooting for an agency, you need to shoot to two cards in case one fails. While it's not what you write, that's important, it's kind of the done thing that you write RAW to CF and jpg to SD to then upload the jpg's as quickly as you can afterwards.

I did notice my 5D3 almost taking an age to sort this out and limiting the shots I can get in a burst run to the point where it being pretty useless.

Don't get me wrong, writing both cards with RAWS of the same size was fine on the wedding I did the week later, however, that's likely because I was taking less shots one after another. For sports though, it's a joke.

Seems like serious penny pinching, or are Canon just a little behind the times; as demonstrated in the 5D3 ( with a slow,SD Card and the antiquated USB2.0 port )

Personally I think SD from an enfineering standpoint is superior, and commercially is the way forward. To me this is a big shame.