I am just learning to take pictures and decided to buy the second lens\n(the first being Canon 50/1.4). I want it to be wide-angle, suitable for\nstreet photography and landscapes (right now I am taking pictures with\nCanon EOS 50, but I don't want to invest in a lens that would be\ncompletely useless with digital camera with factor 1.6). The two likely\ncandidates are:\n\n1. Canon EF 24mm f/2.8\n2. Sigma 24mm f/1.8 EX DG Aspherical Macro\n\nWhat do you think about these lenses? Does Sigma's 1.8 warrant having to\ncarry heavier and bulkier lens? What are other alternatives?