Canon EOS 550D | EOS Rebel T2i
The Canon EOS 550D / EOS Rebel T2i was introduced back in 2010 and featured, for the very first time in Canon's entry-level DSLR series, a full-HD video mode plus microphone jack. The 18MP sensor offered a solid performance and was re-used in various other Canon models.
We generally recommend SDHC and SDXC memory cards with an UHS-I-interface and a SD Speed Class from 10/U1 or above, if you're using a Canon EOS 550D / Rebel T2i. Although UHS-I memory cards do not offer any additional speed, the read-out on your PC or Notebook is noticeably faster and you no longer pay extra for UHS-I models nowadays.