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UDMA 60mb/s or 45mb/s

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Thread started 08 Nov 2009 (Sunday) 12:28   
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tundraman
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Trying to find the right CF card for my 7D. I will use the 8fps but which card should I get?

SanDisk 16GB Extreme IV UDMA CompactFlash Card
http://www.bhphotovide​o.com ...16GB_Extreme_IV_UDM​A.htmlexternal link


SanDisk Extreme CompactFlash Card 16GB

http://www.bhphotovide​o.com ...mpactFlash_Card_16G​B.htmlexternal link

Post #1, Nov 08, 2009 12:28:16


Canon stuff and lots of it SmugMug Coupon Code: 9Sst64IEj4uzk Save $5 Instantly!!

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TBath
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I do not have any personal exp with either card but a review of each card's info at www.sandisk.comexternal link has me leaning towards the 2nd. Seem you are getting them from B&H for the same price. The 2nd card is faster...

Post #2, Nov 08, 2009 13:43:46


7D Gripped
EF-S 17-55 f/2.8 IS USM|EF 28-135 f/3.5-5.6 IS USM|EF 70-300 f/4-5.6 IS USM|EF 50 f/1.8 II|430 EX II x 2

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tancanon58
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I have own the first one but 4GB. It is fast but it is also depend on the pixels of the body. However, I will try the one has 60mb/s.

Post #3, Nov 08, 2009 13:54:25


Bodies: 5D MkIII/ Oly ED-M5/ G10
Lenses: Tamron SP 24-70 2.8 Di VC /and some Panny and Oly lenses.
Flash: Canon600EX RT.

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TBath
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Let us know what you think of it. A new CF card is my next goodie to purchase.

Post #4, Nov 08, 2009 14:03:07


7D Gripped
EF-S 17-55 f/2.8 IS USM|EF 28-135 f/3.5-5.6 IS USM|EF 70-300 f/4-5.6 IS USM|EF 50 f/1.8 II|430 EX II x 2

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TopGun31
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The second one is a newer generation of card ; it will replace the Extreme IV; they are better and apparently cheaper to produce ; in Europe they are also cheaper in stores. I just got myself one along with the Firewire reader from Sandisk, and both are extremly fast to empty on the hard drive.

Post #5, Nov 08, 2009 14:06:13


Gear List
Flickr galleryexternal link
Clicky clicky for my pictures on JetPhotos.netexternal link

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apersson850
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Even with a 90 MB/s card you'll not keep up with the processing power of the dual Digic IV in the 7D. They produce about 250 MB/s of image data, so you'll run out of buffer space anyway.
But a faster card will flush the buffer quicker, so there are still advantages.

Post #6, Nov 08, 2009 14:09:08 as a reply to TopGun31's post 2 minutes earlier.


Anders

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Tom ­ W
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I'd like to see someone that has both run some tests - one in high-speed burst mode and the other to determine how fast the two cards can upload information to the computer (assuming no other bottlenecks). I know that jumping up to the UDMA from non-UDMA adds at least 2 frames to the burst size on my 5D2 (shooting RAW), and speeds up subsequent shots once the buffer is full. I wonder if the 60 mbps would add much to this advantage.

Post #7, Nov 08, 2009 14:34:21


Tom
5D III, 70D, & various lenses

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Replaces
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I don't think 7D's write speed will be able to fully utilize that speed in either card...
although faster seems like a better option if speed is crucial for you.
(probably will flush camera buffer faster; at least by a fraction of a second)

Post #8, Nov 08, 2009 14:43:16


"If you don't walk today, you have to run tomorrow."
Nikon, then Canon, then Nikon again. But I still love POTN over NikonCafe. :p

Nikon D90, MB-D80, Nikon D600, MB-D14, Nikkor AF-S 24-70mm f/2.8G, Nikkor AF-S 70-200mm f/2.8G VR.

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mauimike
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maui
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I purchased the Sandisk Extreme IV 8GB UDMA CF at 45mb/sec at BH while Sandisk has a rebate program going on. No issues at all when using 8fps for my daughter's soccer games or shooting video (haven't seen the card buffer warning screen at all).

Post #9, Nov 08, 2009 14:57:35 as a reply to Replaces's post 14 minutes earlier.




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e02937
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I use the 45mb UDMA cards of the 8gb flavor. They were a great price after rebate from Sandisk. I got three cars for $100. They work great for both still and video. I wouldn't spend the extra money on the 90mb/s but that's me.

Post #10, Nov 08, 2009 15:11:21


Canon 7d
[15-85 IS] [70-200
f/4L IS] [I'm a PC]
[Full gear list and feedback]

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Riverlander
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I got three cars for $100. They work great

Really? US makes or imports?

Post #11, Nov 08, 2009 15:22:03 as a reply to e02937's post 10 minutes earlier.


Canon; 7D with grip, EF-S 10-22, EF 24-105L, 580EX II flash, 550EX flash, 430EX flash, Sigma; 18-50 f/2.8, 50-150 f/2.8, 120-300 f/2.8, 50-500 f/4.5-6.3 OS, 30 f/1.4, 150 Macro; Sigma APO 1.4x and 2x converters, Benro M-257 tripod & B-1 ballhead. Wimberley Sidekick. Lots of other stuff.http://riverlander.smu​gmug.com/external link

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e02937
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The real deal, US made... I ordered them from BH Photo. This is what I ordered:

http://www.bhphotovide​o.com ..._8GB_Extreme_IV_UDM​A.htmlexternal link

I guess they are discontinuing the 45mb/sec in favor of the 90/sec version. When I ordered mine (about 1.5 months ago). They had a 3 pack for 299.95 and then a rebate of $200 (see the link above, there is a rebate form that is valid until 1/2/2010.

Perhaps they can be found at a reputable dealer now? Not sure.

Post #12, Nov 08, 2009 15:25:55


Canon 7d
[15-85 IS] [70-200
f/4L IS] [I'm a PC]
[Full gear list and feedback]

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Riverlander
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Oh dear!!!

Sorry, but I thought you were talking CARS - not CARDS

Post #13, Nov 08, 2009 15:39:05 as a reply to e02937's post 13 minutes earlier.


Canon; 7D with grip, EF-S 10-22, EF 24-105L, 580EX II flash, 550EX flash, 430EX flash, Sigma; 18-50 f/2.8, 50-150 f/2.8, 120-300 f/2.8, 50-500 f/4.5-6.3 OS, 30 f/1.4, 150 Macro; Sigma APO 1.4x and 2x converters, Benro M-257 tripod & B-1 ballhead. Wimberley Sidekick. Lots of other stuff.http://riverlander.smu​gmug.com/external link

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amfoto1
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apersson850 wrote in post #8978015external link
They produce about 250 MB/s of image data, so you'll run out of buffer space anyway.
But a faster card will flush the buffer quicker, so there are still advantages.

I have looked and looked for the 7D's write speed and can't find it in any of the specifications Canon has released.

Anyone know?

I'd be surprised if it was amuch bove 45MB/s, which means that any card faster than 300x wouldn't make any difference in the camera itself (but it might download to the computer faster).

The reason I was wondering is that I've noticed that the 7D takes longer to display an image right after it's shot. I have image review "off", but occasionally manually review an image. If you do that right after taking a shot, with 7D it won't display it, the preceding image will come up instead. One or two seconds later, the most recent image is available.

So image review isn't instantaneous on the 7D, the way it is on both 5D MkII and 50D.

In order to take full advantage of UDMA download speeds (transfering to your computer), you need to have an UDMA capable card reader and Firewire 800 connectivity. Slower readers can download from the cards, but only at their lower speed rating. USB 2.0 and Firewire 400 are going to take about twice as long to download a card.

I have an Express Card reader for my laptop that's able to do 54MB/s (close to 400x, which is 60MB/s), but it's a bit fiddly to load and unload cards (plus the laptop's single drive fills up fast, so I have to move images off it via a network pretty frequently).

Post #14, Nov 08, 2009 16:01:25


Alan Myers
"Walk softly and carry a big lens."
5DII, 7D(x2), 50D(x3) & other cameras, various lenses/access. - FLICKRexternal link - PRINTROOMexternal link

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amfoto1
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San Jose, California
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merlin2375 wrote in post #8978277external link
The real deal, US made... I ordered them from BH Photo. This is what I ordered:

http://www.bhphotovide​o.com ..._8GB_Extreme_IV_UDM​A.htmlexternal link

I guess they are discontinuing the 45mb/sec in favor of the 90/sec version. When I ordered mine (about 1.5 months ago). They had a 3 pack for 299.95 and then a rebate of $200 (see the link above, there is a rebate form that is valid until 1/2/2010.

Perhaps they can be found at a reputable dealer now? Not sure.

Looks like B&H has sold out of them, and the link to the rebate info on the product page is dead.

Go to B&H home page, click on "rebates" and then "memory". You can still get the Sandisk form. It's got a list of retailers who qualify. Lot's of familiar names on the list.

You have to buy the Extreme 4 cards to qualify for the bigger rebate.

Post #15, Nov 08, 2009 16:13:40


Alan Myers
"Walk softly and carry a big lens."
5DII, 7D(x2), 50D(x3) & other cameras, various lenses/access. - FLICKRexternal link - PRINTROOMexternal link

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