Best SD/SDHC cards for Canon Rebel T2i / EOS 550D, T1i/ 500D and XSi /450D
Secure Digital or SD cards are widely used in cameras. Three different kinds of SD cards are used in cameras:
- SD cards (up to 4G),
- SDHC cards (High Capacity 4G to 32G)
- SDXC cards (eXtended Capacity up to 2TG).
SD card speed classifications:
The speed ratings are very confusing for consumers. The speed Class Rating are the official standard defined by SD associated. The speed is defined as the minimum transfer speed at the worse cases,
- Class 4: 32 Mbit/s (4 MByte/s)
- Class 6: 48 Mbit/s (6 MByte/s)
- Class 10: 80 Mbit/s (10 MByte/s)
The X rating is a unit coming from CD-ROM drive speed of 1.2Mbit/s. The conversion of Class and X rating:
- 26x Class 4 (writing speed 32 Mbit/s)
- 40x Class 6 (writing speed 48 Mbit/s)
- 66x Class 10 (writing speed 80 Mbit/s)
- 133x Class 45 (writing speed 360 Mbit/s)
Sometimes, the SD card, SDHC or SDXC card have a rated speed of XXMB/s. That is the maximum speed that the card reads or writes at normal conditions.
Which SD card brand to get and how much memory?
The reliability of SD/SDHC cards are extremely important for digital SLRs. I learned this lesson in a hard way after my SDHC card failed and I lost all the photos and videos on the card. Since the price of the SD/SDHC cards are down so much, it is better off to buy good and reliable cards.
The SanDisk Extreme SDHC card is fast and more affordable than before. Considering the value, reliability and speed, the best cards to use with Canon digital Rebel T2i or EOS 550D; T1i /500D, or XSi /450D are SanDisk Extreme SDHC cards. For Canon Rebel T2i or EOS 550D, 8G SDHC card can record 24 min of 1080p video and ca 450 photos in RAW. You can get a couple of 8G or 16G SDHC cards depending on your own needs.
If you feel that the SanDisk Extreme SDHC card is too expensive, SanDisk Ultra SDHC card is still OK for Canon T2i. The other very good card is Lexar professional 133x SDHC card.