DP2 Quattro to SD card write speed

Started Nov 4, 2014 | Questions
joshualutz New Member • Posts: 15
DP2 Quattro to SD card write speed

Hello! I have not been able to find out at what maximum speed the Sigma DP2 Quattro camera writes files to the SD card. Is it worth getting the faster and more expensive SDXC cards, or is this just overkill. Has anyone noticed a difference in write speeds between SDHC cards and SDXC cards? Thanks.

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Apsphoto Contributing Member • Posts: 503
Re: DP2 Quattro to SD card write speed

I don't know the speed, but I have not noticed a difference using 45mb/s cards or using 95mb/s cards, so it can use the cheaper cards without a penalty.

Alan

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Laurence Matson
Laurence Matson Forum Pro • Posts: 11,973
Re: DP2 Quattro to SD card write speed

joshualutz wrote:

Hello! I have not been able to find out at what maximum speed the Sigma DP2 Quattro camera writes files to the SD card. Is it worth getting the faster and more expensive SDXC cards, or is this just overkill. Has anyone noticed a difference in write speeds between SDHC cards and SDXC cards? Thanks.

Joshua,

Look for card reliability and not necessarily speed. Each image takes about 8-10 seconds click to finish. For the interval settings I mentioned at 10 seconds, the writing of the image completes just before the next click.

The may well be a difference among cards of different speeds when I comes to uploading via a card reader. Again, I think the card reader is far more important than the card in terms of speed. I have a Firewire 800 reader for some cards and a UsB 2.0 for others. The former is twice as fast as the latter.

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Apsphoto Contributing Member • Posts: 503
Re: DP2 Quattro to SD card write speed

I agree with Laurence about the card reader, that really makes a difference, with faster cards especially. I use a usb3 reader from Transcend, that is really , really fast.

Alan

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Alan Smallbone
Orange county, CA

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Scottelly
Scottelly Forum Pro • Posts: 12,167
Re: DP2 Quattro to SD card write speed

I think it writes at standard UHS-1 speeds, which translates to about 50 megabytes per second, depending on file sizes and memory card architecture, etc. Some UHS-1 specification cards claim to be capable of faster write speeds, but very few devices actually support writing faster than the spec. This is one reason it makes sense to use CF cards still. There are devices that write at UDMA 7 speeds, which are up to more than 100 megabytes per second. I'm hoping the new DSLR from Sigma will be like this. It really needs to be, because it will surely have a very big buffer. No doubt the processing speed will be the bottleneck, but faster memory card write speeds would be very nice. As it is now, the 8 second maximum write times in the DP Quattro cameras really is not significantly limited by the memory card write speeds (even if the memory card write speed was twice as fast the write times would only be reduced by about a second, from 8 seconds to 7 seconds), so maybe Sigma will just put a UHS-1 SD card slot in the new DSLR. I'm hoping for faster processing and a faster memory card slot, but I guess we just have to wait and see.

I suggest this card (looks like a great value):

http://www.bhphotovideo.com/c/product/855703-REG/delkin_devices_ddmicrosdpro2_16gb_16gb_microsd_pro_sdhc.html

This looks good too:

http://www.bhphotovideo.com/c/product/1031504-REG/lexar_lsdmi16gbsbna633r_16gb_micro_sdhc_card.html

Here's a good memory card case:

http://www.bhphotovideo.com/c/product/828755-REG/Pelican_0910_015_110_0915_Memory_Card_Case.html

I stay away from Kingston, Transcend, and PNY cards, because I've had bad experiences with them (speed, compatibility, and/or reliability problems). I have found Lexar to be the best and most reliable cards I've used, and this is reported by a friend of mine too, but those Delkin cards have a great reputation for speed and reliability. They cut their teeth in the pro market. Memory cards, as you might already know, are pretty hit and miss. I got some 2 GB microSD cards made by HP really cheap at a Best Buy or CompUSA (can't remember which store) many years ago, and they worked great until I put them in my new Nikon D5000, which burned up two of them, but not all of them. These days the maximum size card I will put in a camera is 16 GB, but I wouldn't be averse to using a 32 GB card in a Quattro camera, just because the file sizes are so big that the number of files is not as great as it might be otherwise. I don't think I would get a 64 GB card yet. The value and reliability are probably not at the sweet spot yet. If I were shooting 4K video I might get a couple of those though. I have found memory cards to be quite reliable, never actually losing any photos, even though I have had mishaps (one 4 GB SD card was chewed up by my sister's dog, three or four microSD cards were burned up by cameras, I lost one card, a couple microSD cards stopped working properly over time, and the memory card reader in a model's Dell computer screwed up one SD card - I have had issues with a couple of CF cards too).

(I don't have a Quattro, so I can't tell you what card works best with them.)

Good luck!

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MOD Kendall Helmstetter Gelner Forum Pro • Posts: 20,388
Huge difference in speed on my Quattro from 40 to 95 MB/s
1

Apsphoto wrote:

I don't know the speed, but I have not noticed a difference using 45mb/s cards or using 95mb/s cards, so it can use the cheaper cards without a penalty.

On my Quattro, my Sony 64GB U1 40MB/s card, takes about five seconds longer to write an image than does a Sandisk 32GB U1 95MB/s card.

Some of that could be the brand but I just thought people should know there was a very notable difference between some cards.

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OP joshualutz New Member • Posts: 15
Re: Huge difference in speed on my Quattro from 40 to 95 MB/s

Kendall Helmstetter Gelner wrote:

Apsphoto wrote:

I don't know the speed, but I have not noticed a difference using 45mb/s cards or using 95mb/s cards, so it can use the cheaper cards without a penalty.

On my Quattro, my Sony 64GB U1 40MB/s card, takes about five seconds longer to write an image than does a Sandisk 32GB U1 95MB/s card.

Some of that could be the brand but I just thought people should know there was a very notable difference between some cards.

Interesting.

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Osa25 Senior Member • Posts: 1,702
Re: Huge difference in speed on my Quattro from 40 to 95 MB/s

Kendall Helmstetter Gelner wrote:

Apsphoto wrote:

I don't know the speed, but I have not noticed a difference using 45mb/s cards or using 95mb/s cards, so it can use the cheaper cards without a penalty.

On my Quattro, my Sony 64GB U1 40MB/s card, takes about five seconds longer to write an image than does a Sandisk 32GB U1 95MB/s card.

Some of that could be the brand but I just thought people should know there was a very notable difference between some cards.

Any update on user experiences with this?

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MOD rick decker Forum Pro • Posts: 15,866
Re: Huge difference in speed on my Quattro from 40 to 95 MB/s

First, I buy SanDisk or Kingston as they seem to be the most reliable and have given me the best performance.

Second, it pays to reformat your cards periodically. I reformatted all my cards - a dozen or so and my older ones had substantial decreases in write times.

I shoot mainly SanDisk 95mbs with Quattros. I measure combined processing and write times. I.E. times from pushing the shutter until the write light goes off. Here are some figures:

Times: 95 mb/s 5-6 seconds; 80 mb/s 8-10 seconds; kingston 60 mb/s 7 to 9.

Hope this helps.

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target5
target5 Contributing Member • Posts: 783
Re: Huge difference in speed on my Quattro from 40 to 95 MB/s
1

rick decker wrote:

First, I buy SanDisk or Kingston as they seem to be the most reliable and have given me the best performance.

Second, it pays to reformat your cards periodically. I reformatted all my cards - a dozen or so and my older ones had substantial decreases in write times.

I shoot mainly SanDisk 95mbs with Quattros. I measure combined processing and write times. I.E. times from pushing the shutter until the write light goes off. Here are some figures:

Times: 95 mb/s 5-6 seconds; 80 mb/s 8-10 seconds; kingston 60 mb/s 7 to 9.

Hope this helps.

I use also SanDisk 95mb/s with SD15 and DP3M and they are very very fast.

Do you format periodically your card on Windows and which type of formatting do you perform (fast formatting or slow)?

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Osa25 Senior Member • Posts: 1,702
Re: Huge difference in speed on my Quattro from 40 to 95 MB/s

rick decker wrote:

First, I buy SanDisk or Kingston as they seem to be the most reliable and have given me the best performance.

Second, it pays to reformat your cards periodically. I reformatted all my cards - a dozen or so and my older ones had substantial decreases in write times.

I shoot mainly SanDisk 95mbs with Quattros. I measure combined processing and write times. I.E. times from pushing the shutter until the write light goes off. Here are some figures:

Times: 95 mb/s 5-6 seconds; 80 mb/s 8-10 seconds; kingston 60 mb/s 7 to 9.

Hope this helps.

Thanks - that's helpful. In the DP2Q am using a Sandisk Ultra 64 GB ( ) and was wondering if the camera is capable of processing faster than that particular SD card can write data:

From your info, it seems that indeed there is some speed to be gained from spending more on a card. I guess the question becomes: "how much is 5-7 seconds worth"?

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Apsphoto Contributing Member • Posts: 503
Re: Huge difference in speed on my Quattro from 40 to 95 MB/s

target5 wrote:

rick decker wrote:

First, I buy SanDisk or Kingston as they seem to be the most reliable and have given me the best performance.

Second, it pays to reformat your cards periodically. I reformatted all my cards - a dozen or so and my older ones had substantial decreases in write times.

I shoot mainly SanDisk 95mbs with Quattros. I measure combined processing and write times. I.E. times from pushing the shutter until the write light goes off. Here are some figures:

Times: 95 mb/s 5-6 seconds; 80 mb/s 8-10 seconds; kingston 60 mb/s 7 to 9.

Hope this helps.

I use also SanDisk 95mb/s with SD15 and DP3M and they are very very fast.

Do you format periodically your card on Windows and which type of formatting do you perform (fast formatting or slow)?

I format each time after downloading the images, put it back in the camera and reformat in camera. I find I have less issues with errors when formatted in camera.

Alan

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Alan Smallbone
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Tom Zimmer
Tom Zimmer Contributing Member • Posts: 627
Re: DP2 Quattro to SD card write speed

joshualutz wrote:

Hello! I have not been able to find out at what maximum speed the Sigma DP2 Quattro camera writes files to the SD card. Is it worth getting the faster and more expensive SDXC cards, or is this just overkill. Has anyone noticed a difference in write speeds between SDHC cards and SDXC cards? Thanks.

Jashua, I use one of these for my DP1Q;

SANDISK #SDSDXPB032GA46 Extreme PRO SDHC 32GB UHS-II up to 280 MB/s read

I previously purchased the 16GB version for my X-T1 and it has been excellent in terms of reliability and the speed of getting the images off the card using this card reader;

Sandisk Extreme PRO Card Reader - External (SDDR-329-A46)

So far, having shot about 8000 images, the 32Gb card has worked perfectly. I just erase the images in the camera not on the computer, and I have reformatted the card a couple of times in camera.

The super speed card doesn't seem to make any different in user experience over i suppose a 95MB/s card, but I certainly enjoy the speed I get when reading the images into the computer.

By the way, the computer is probably the limiting point for data transfer. I have a newer iMac with a Fusion drive, and the card reader brings in a hundred images in seconds. Then when i copy the folder to an external USB3 drive, it takes several times longer. So be warned that unless you have a really fast computer it probably won't make any difference.

Finally, there is the processing time of SPP, which doesn't get any faster, so it may all be a moot point.

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MOD rick decker Forum Pro • Posts: 15,866
Re: Huge difference in speed on my Quattro from 40 to 95 MB/s

I use the dos formatting which is (most likely) the slowest (start-cmd-format x:). I have not tried it off windows explorer or in-camera

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target5
target5 Contributing Member • Posts: 783
Re: Huge difference in speed on my Quattro from 40 to 95 MB/s
1

rick decker wrote:

I use the dos formatting which is (most likely) the slowest (start-cmd-format x:). I have not tried it off windows explorer or in-camera

Thank you for the reply.

When you perform the DOS formatting, you insert the SD card into the camera and start taking photos or you perform another in-camera formatting?

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MOD rick decker Forum Pro • Posts: 15,866
Re: Huge difference in speed on my Quattro from 40 to 95 MB/s
1

I just start taking photos.  I was surprised how much formatting could help.  Not that it helped with all of them and I did about 12 cards.  But with some of the cards I was bitching to myself about performance and those were the ones that were improved significantly.  The max size card I  have is 16GB and most are 8.  I haven't gone much larger as I don't have the need.

R

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Big Ga Forum Pro • Posts: 18,623
Re: Huge difference in speed on my Quattro from 40 to 95 MB/s

rick decker wrote:

I just start taking photos. I was surprised how much formatting could help.

Yes, but what sort of formatting are you talking about here ?

Laurence Matson
Laurence Matson Forum Pro • Posts: 11,973
Formatting

joshualutz wrote:

Hello! I have not been able to find out at what maximum speed the Sigma DP2 Quattro camera writes files to the SD card. Is it worth getting the faster and more expensive SDXC cards, or is this just overkill. Has anyone noticed a difference in write speeds between SDHC cards and SDXC cards? Thanks.

Since this seems to have wrought a bit of controversy, here is the rule:

Best formatting practice is to do it in the primary computer you use for the images. This makes sure that the computer will read the card - highly likely if you know what you are doing, in any case - and leaves the camera up to writing. If the camera will not write - try a test shot - it will ask for reformatting permission. Try it there, but just make sure that the computer will read it by taking one shot. The latter is also highly likely but not as certain as suggestion one.

All of this excitement is far less relevant than 20 years ago, when formatting was closer to rocket science than common procedure.

Finally, it appears that the Q cameras respond better to faster cards than was previously the case in other Sigma cameras .

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MOD rick decker Forum Pro • Posts: 15,866
Re: Huge difference in speed on my Quattro from 40 to 95 MB/s

http://www.computerhope.com/formathl.htm and I use the default parameters.

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Big Ga Forum Pro • Posts: 18,623
Re: Formatting

Laurence Matson wrote:

Since this seems to have wrought a bit of controversy, here is the rule:

Best formatting practice is to do it in the primary computer you use for the images.

Surely this is incorrect ?

Accepted best practice is to format the memory card in the camera that's going to be used to take the pictures ?!?

Unless of course we are discussing doing wholesale block erasure of the flash memory chips to restore 'from the factory' performance.

But I'm not sure if that is what indeed is being talked about.

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