When I bought my Canon T1i, I ordered SanDisk 4GB Extreme III – SDHC Class 6 High Performance memory card (SDSDX3-004G-P31, Retail Packaging) – NEW 30MB/s version card along with it. I should have ordered a higher capacity card though. I prefer shooting in RAW mode, which demands lot of storage e.g. Approx. 20 MB / image. Considering card can hold about 250 images in all, its really necessary that I keep transferring photos from card everyday. Otherwise, I have chance to clear some space by deleting unwanted photos. In the middle of shoot, this is not so good idea.
Finally I decided to buy a higher capacity card. I chose Transcend 16 GB this time. There was $10 difference between SanDisk 4GB and Transcend 16GB card. Both of them were class 6 cards and I thought it should be ok. Amazon reviews were good for both of the cards.
Finally I received the Transcend card today and first thing I noticed was, speed! SanDisk is way faster than Transcend!
I did setup a simple test to measure the speed of both cameras. Here is what I did…
Canon 500 D (T1i) + Canon 50mm 1.8 lens in Manual Focus mode + 1/50 sec exposure + Continuous shooting mode + f1.8
I took 15 photos with each card. Manual focus was used to avoid any focusing time. I was just interested in knowing the speed of the operation. Results were as following:
SanDisk – 15 photos – Camera started taking pause after 9 shots – Total time required to finish writing 15 images was 20 seconds.
Transcend – 15 photos – Camera started taking pause after 8 shots – Total time required to finish writing 15 images was 39 seconds.
The speed was almost double compared to Transcend.
If you are tight on budget and capacity is main concern then you should buy Transcend. If you are looking for fast memory cards, then look something else.
Hope this helps.