on July 13, 2010
Some time ago I purchased a Transcend 16 GB Class 10 card and reviewed it as "Fast, Fast, Fast". Later reviewers pointed to the printed speed on the actual cards (and on the corporate web pages) (Transcend - 20 MB/sec, Sandisk Extreme - 30 MB/sec) as an indication that the Transcend card was not particularly fast. Since the term "speed" itself is pretty much a subjective description, and since the speed of the card also depends upon the speed of the camera hardware and software, I thought it might be worth speed timing the different cards in my camera (a Canon T1i).
My original card, before I bought the Transcend 16 GB Class 10, was a Transcend 8 GB Class 6 (actually a micro-sdhc card) and my review of the Transcend Class 10 card was based on comparison with that card. I bought the Sandisk Extreme card (8 GB since it was pretty expensive) and tested each.
The actual timing tests were simple enough. I formatted each card before each test. I then took 20 continuous photos at 8 MP, at 15 MP and at RAW, and recorded the time from the start of taking pictures to the time when the recording light turned off.
1) Transcend 8 GB, class 6
Format - 51.5 seconds,
20 continuous photos, 8 MP, least compression - 8.6 seconds,
20 continuous photos, 15 MP, least compression - 13.4 seconds,
20 continuous RAW photos - 44.3 seconds
2) Transcend 16 GB, class 10
Format - 46.2 seconds (the other cards are 8 GB so this time is not relevant. I included it for the sake of completeness),
20 continuous photos, 8 MP, least compression - 8.4 seconds,
20 continuous photos, 15 MP, least compression - 10.8 seconds,
20 continuous RAW photos - 31.4 seconds
3) Sandisk Extreme 8 GB, class 10
Format - 8 seconds,
20 continuous photos, 8 MP, least compression - 8.0 seconds,
20 continuous photos, 15 MP, least compression - 9.7 seconds,
20 continuous RAW photos - 27.4 seconds
1) Clearly the Sandisk Extreme formats much faster than the Transcend Class 6. A comparison with the 16 GB Transcend Class 10 card would be invalid since the sizes are not the same and there is no evidence that timing for formatting is linear. That is, there is no reason to believe that it would take twice as long to format a 16 GB card as an 8 GB card. It might take more, it might take less,
2) Taking photos at 8 MP, least compression, is nearly the same for all cards. Canon recommends a Class 6 card for the T1i and it appears that that is sufficient for photos taken at 8 MP,
3) Taking photos at 15 MP, least compression, showed a significant difference depending on the card. The Transcend Class 10 card took almost 20% less time than the Transcend Class 6 card and the Sandisk Class 10 card took about 10% less time than the Transcend Class 10 card,
4) Taking RAW photos also showed a significant difference depending on the card. The Transcend Class 10 card took about 29% less time than the Transcend Class 6 card and the Sandisk Class 10 card took almost 13% less time than the Transcend Class 10 card.
Some things seem clear to me.
1) The Transcend Class 10 card was clearly faster in all categories (except 8 MP) than the Transcend Class 6 and that was the basis for my review of the card. In my opinion the upgrade from the Transcend Class 6 to the Transcend Class 10 was worth doing given the way I take photos (15 MP, ocassionally RAW).
2) The Sandisk Extreme Class 10 card is faster than the Transcend Class 10 card when used in the camera to take pictures larger than 8 MP (the difference at 8 MP is 5% which is not, in my opinion, significant). Clearly the difference between the Transcend Class 10 and the Sandisk Class 10 is significant although the user would have to determine if the 10% and 13% differences were worth the difference in price (the Sandisk 8 GB Class 10 is more expensive than the Transcend 16 GB Class 10). Given the way I use my camera I feel it is not worth the difference in price, but others may feel differently.
3) The difference in speeds between the Transcend Class 10 and the Sandisk Extreme Class 10, when used in the camera, are very different than the theoretical differences given the posted speeds. Given those posted speeds, a user might well expect that the Sandisk Extreme would be about 30-35% faster, but it is not and one has to assume that the difference is caused by the speed of the camera hardware and software.
I rated this card as 5 stars although the extra speed was not significant enough for me to justify the extra cost. Still, the card is faster than my Transcend Class 10.
I will be writing this review for both SanDisk Extreme SDHC class 10 8gb and Transcend SDHC class 10 16gb.
I bought SanDisk class 10 and Transcend class 10 for my new Panasonic LX5. I got both card because no one really did a comparison with a compact camera and I was just going crazy trying to see if there is any big difference between the 2 cards.
SanDisk Extreme package box indicated it's water proof, x-ray proof, shock proof, temperature proof. I am not ready to spend $50 to see if it really stand up to it's words. And I don't think normal people would go through the extreme condition in taking pictures or videos.
Cut the story short, I really want to see if there is any difference in writing performance between the 2 cards in a compact camera. There is a continuous burst mode in LX5 and the manual indicated it is only limited by the condition of picture environment and performance of the SD card. Within the mode there are 2 different settings:1) speed priority or 2) picture/quality priority. The shutter speed is much faster with speed priority compare to picture priority.
I first formatted both cards out of box then put each card in series of test(3 rounds each setting for each card) shooting at the same object under same lighting condition. The results:
SanDisk Class 10 8gb
22-33 shots before camera stopped to allow the card to catch up with writing.
Transcend Class 10 16gb
22-24 shots before camera stopped to allow the card to catch up with writing.
SanDisk Class 10 8gb
34-46 shots before camera stooped
Transcend Class 10 16gb
27-33 shots before camera stopped
It seems that at a higher shutter speed, both cards performed very similar under the same shooting condition. But at a slower shutter speed the SanDisk definitely out perform Transcend. I hope this little experiment satisfied anyone with curiosity like me. Transcend definitely is a bargain with 16gb and almost half of the price compare to SanDisk. But I am going to use SanDisk Extreme as my primary card and Transcend as backup or on a second camera to ensure i would not miss any shots.
on September 7, 2009
As an ex-Leica and former Nikon SLR user this is my first venture into the world of DSLR. For me, conventional film cameras are over.
I used this SanDisk card with a new NIkon D90 and 24mm-70mm lens. All of my photos are shot in RAW that generates large files. Simply put, it worked flawlessly. I shot multiple images at the frames per second capacity of the camera without a hitch or delay. As fast as I shot, the card handled it and never experienced a delay. Thus far, I have taken approximately 300 pictures.
Once I loaded the card into the Lexar reader ( USB 2.0 MULTI CARD) it downloaded very quickly on to my iMac (4 gigs of ram). My chosen software is Aperture from Apple. Aperture amazes me. Everything worked seamlessly and hassle free. Unless my files (newer camera in the future?) become significantly larger this card gets fives stars from me.
on May 10, 2010
This card is the perfect fit for my Canon Rebel T2i. It holds 900+ high-quality jpegs, and it's perfect for a camera that needs extremely fast storage. Its Class 10 rating means that it never stutters when taking video, and it never slows down the camera when taking rapid-fire shots. I've had nothing but exemplary reliability from SanDisk SD and SDHC cards, and I'll continue to use them. I've seen the price in retail stores and from some online retailers to be twice what it is here or more, so buying from Amazon is an excellent bargain.
on August 15, 2010
If your camera is over 10 megapixels and takes 3+ shots per second... You need a fast memory card. This is one. This is a GREAT one. The canon rebel is 18MP and the file sizes get up towards 30MB when shooting in RAW. Video also eats up memory quickly.
Cameras like the D90 that shoot at 4.5FPS and don't have a huge buffer like pro bodies really benefit from this Class 10 Card. I use one (as well as a T2i) and the memory write speed can make the difference when shooting action.
Sandisk is the best in the business, in my humble opinion. Even their USB thumb drives are legendary for quality and reliability. I have several of those, along with other SD cards from Class 10 to ...before they labeled them with speeds.
Will a cheap memory card work? Yes!
It will. Then one day (maybe one like this) you're going to realize that the performance of your camera is directly related to the cheap card you threw in there. If you take one picture at a time, and don't care if you lose all your images, etc - the cheap cards can do that.
Got a new T2i or 60D? Don't consider a slow card if you're thinking about trying the HD movie mode! The video will look great until the camera chokes and basically spits out all the data. Hopefully it wasn't something you were planning on looking at again. Slow cards and massive data transfers do not mix.
When you discover the benefits of shooting in RAW and Continuous (good reasons for using a DSLR?), that's where this card comes in to play.
If you already realize that you need a fast memory card, you're on the right page. Scroll up and find the "Add to Cart" button. Order this and be done with it.
Snazzy looking card, by the way. It deserves some customer images. Even the box it comes in is nice.
5/5 - Worth Every Cent.
on March 7, 2011
I purchased a SanDisk Extreme III 8gb card. I installed it in my Sony DSC-TX7 camera and went on vacation. When I returned, I removed the card to install on my laptop. When I opened the battery/SD door and ejected the card, the card came out along with black pieces of plastic. When I closely inspected the pieces of plastic they came from the front edge of the memory card. The card was actually coming apart.
I contacted SanDisk and told them of the problem. This is where the real problem started. SanDisk asked me to send them pictures of the defective card. The card is so small that I could not get good pictures without Macro capability. I do not have that on my Sony camera. I took the best pictures I could and sent them in. I got an email back that my case had been escalated to a higher level and the response was that SanDisk is not responsible for mis-use of memory cards. I had only inserted and removed the card once from my camera. I hardly consider that mis-use.
I find that SanDisk is not customer oriented! They would rather contest a minor product complaint than satisfy a customer complaint. Their warranty is worthless. I will never purchase another SanDisk product again. It is not so much the problem with their product as their attitude towards their customers. If you buy a product from this company, don't expect them to honor their warranty or try to satisfy you as a consumer.