Just a quick question (not too open ended). Is the Yongnuo YN 50mm f/1.8 Lens for Canon EF compatible with the Rebel T2i (550D)? And if so, would you recommend the lens?
Thanks in advance for any help.
Yes. EF lenses can be used with EF-S camera bodies, such as the T2i / 550D.
From the accepted answer to the question, What is the difference between EF and EF-S lenses?,
Film and larger-sensor digital cameras (5D, 1D, 1Ds) take only EF lenses. If you have a camera with EF-S mount support (such as EOS 7D, 50D or 500D), you can use both EF and EF-S lenses.