I have an EF16-35mm lens that I first used on an EOS 10 film body. I have a 7D now and, as this is a crop body, my once 'ultra' wide zoom is now a lot less wide. I occasionally want to shoot wider than 24mm equivalent on a 35mm body, typically in poor light. So any suggestions on a good quality lens that is near 16mm equivalent on a 35mm body, preferably with f2.8? I have looked at Sigma and Tokina zooms; the Tokina 11-16 f2.8 appearing to be a good choice. But it is not cheap and I think it will only fit a crop body; I would prefer something that will do FF as well (I still shoot film occasionally). I have considered a number of primes but they do not come cheap either. As this is an occasional need lens I would prefer not to spend too much. Affordable, by the way, is as far south of £250 Stirling / $500 Dollars US as possible. I think I am going to struggle somehow. As an aside, I think the 7D is a superb tool. I love the way you can trigger a slave flash from the integral unit, the system working just brilliantly with my 550EX. I did not think I would ever need it but now find I use it a great deal. I also love the choice of focusing systems, the ability to add or remove grids on the screen, the size of the viefinder, the accurate metering - something I really found to be tricky on the 5D I once owned - and the video and..... Sorry, straying off topic. But boy the 7D is a brilliant piece of kit for both my work and liesure use. If only I could make it go as wide as I sometimes want I don't think I would need a new body in years. (Apart from the organic one responsible for conveying my brain around that is).