Yes, you've got the later version of the 30/2.8 lens. Given how recessed the front element is, it's not surprising the lens would vignette w/ that hood. I tried an aftermarket hood on my 35/1.8, which also has a deeply recessed front element, and experienced vignetting. But I don't think a hood is necessary for these Canon 35s. The lens coatings are pretty good and with the recessed front element flare should not be a huge problem, unless your pointing the lens at a light source, but then a hood won't help you there.