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**antoeknee** · 02-02-2016, 17:08

Re: CF Card or SD Card?

SD card is much slower. If you do a Web search there were lots of articles that highlight that the burst speed is slower when saving to SD or CF and SD.

**Robert Scott** · 02-02-2016, 17:24

Re: CF Card or SD Card?

Originally posted by antoeknee View Post

SD card is much slower. If you do a Web search there were lots of articles that highlight that the burst speed is slower when saving to SD or CF and SD.

We covered this on page 76 of EOS magazine July-September 2012. PDF image attached.

Dual card dilemma (JS 2012).pdf

**Nathaniel** · 02-02-2016, 17:35

Re: CF Card or SD Card?

I do not know how many members save their pictures on CF or SD cards but I now save all my photos on an external hard drive as advised by many members.

**Tigger** · 02-02-2016, 17:48

Re: CF Card or SD Card?

Originally posted by Nathaniel View Post

I do not know how many members save their pictures on CF or SD cards but I now save all my photos on an external hard drive as advised by many members.

Nat he's talking about in the camera

I use either Colin as burst rate isn't a concern

**tigerburnie** · 02-02-2016, 18:49

Re: CF Card or SD Card?

I have an SD just now and the rapid fire doesn't like it, CF card is my next buy as I am also thinking about shooting videos in the summer.

**Nathaniel** · 02-02-2016, 18:49

Re: CF Card or SD Card?

Oops! Apologies.

**digiman** · 03-02-2016, 11:03

Re: CF Card or SD Card?

Originally posted by Robert Scott View Post

We covered this on page 76 of EOS magazine July-September 2012. PDF image attached.

[ATTACH]14127[/ATTACH]

An interesting article Robert.

Quote from article
However, writing the image file to an SD card takes longer than to a CF card, so if an SD card is used the buffer clears more slowly and so fills up more quickly

I know that this was a test carried out on the 5diii, but, as far as you know, would it be the same for others also? I shoot with SD in my 1dsii, and have commented previously on the time the buffer takes to clear. I use SD because that's what my 500d uses, so that's what I've got! If CF cards clear quicker, maybe I need to invest!

**Robert Scott** · 03-02-2016, 12:21

Re: CF Card or SD Card?

Originally posted by digiman View Post

An interesting article Robert.

Quote from article
However, writing the image file to an SD card takes longer than to a CF card, so if an SD card is used the buffer clears more slowly and so fills up more quickly

I know that this was a test carried out on the 5diii, but, as far as you know, would it be the same for others also? I shoot with SD in my 1dsii, and have commented previously on the time the buffer takes to clear. I use SD because that's what my 500d uses, so that's what I've got! If CF cards clear quicker, maybe I need to invest!

Yes, this will apply to all cameras.

**digiman** · 03-02-2016, 12:53

Re: CF Card or SD Card?

Originally posted by Robert Scott View Post

Yes, this will apply to all cameras.

Cheers,

Garry

**paul linton** · 03-02-2016, 15:53

Re: CF Card or SD Card?

I shoot sport yet i still have both cards in my camera as the speed difference is not that noticeable unless you're shooting like a machine gun if i can survive most people surely can. Just make sure either card (SD or CF) has a quick read/write speeds otherwise both cards will be slow no matter what.

Paul

**antoeknee** · 03-02-2016, 17:47

Re: CF Card or SD Card?

Think you'll find that the SD card in the slot but not being written too was proved to be false. Write speeds to CF and SD are somewhat different, CF much faster.

Now if I recall correctly there was some changes made to architecture on 7D2 so that issue wasn't as big a problem.

Anyway as said choosing right cards can make a significant difference. I've posted link before on different cards in 5D3 and there was some major differences. If I can find it again I'll post it.

**antoeknee** · 03-02-2016, 17:53

Re: CF Card or SD Card?

Found the page again

The Fastest SD & CF Cards for the Canon 5D Mark III | PhotoShelter

http://blog.photoshelter.com/2014/11/the-fastest-sd-cf-cards-for-the-canon-5d-mark-iii/

This is a part of our SD/CF/XQD Database. The data in the table below tracks the time (in seconds) it took to write 20 RAW and 20 Fine Large JPG to the memory card. Timing commenced when the camera’s card status light illuminated, and stopped when the light went out. Each test cycle was performed […]

Best performance in green, both CF and SD listed.

Worth noting burst speed of best CF was 83 and best SD was 26.

**DrJon** · 03-02-2016, 18:32

Re: CF Card or SD Card?

This site is good for in-camera performance:

Canon 5Ds SD and CF Card Speed Comparison Fastest Write Speed Tests for EOS 5Ds 5Ds R Digital Cameras - Camera Memory Speed Comparison & Performance tests for SD and CF cards

http://www.cameramemoryspeed.com/canon-5ds/sd-cf-card-comparison/

Write speed test of the Canon EOS 5Ds camera with SD and CF card comparison. Fastest and recommended memory cards for 5Ds and 5Ds R continuous shooting DSLR.

But it doesn't mention that inserting SD cards can't bend any pins in the camera and they are usable in a wider range of circumstances than CF cards (plus cheaper too..).

**Les McLean** · 03-02-2016, 19:04

Re: CF Card or SD Card?

I did a test of different cards I had in a 7D2, it was a year ago, so there are possibly faster cards out there now?

Shooting a single continuous burst, the number of raw files it achieved in that one burst, and then the time it took to clear the buffer.

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CF Card or SD Card?

CF Card or SD Card?

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