Does anyone carry an 85mm on a crop? How often is it useful? I was thinking of picking up the Canon 85 f/1.8, primarily for taking photos of surfers and such where my cheap 50mm's AF can't keep up. I might use the 35mm f/2 in more situations, but I already have a 24 and 50 so I can't decide if I'd rather have a telephoto.
Or I could just get nothing. The 24 is all I need in 85% of situations.