I've got a nift-fifty (Canon 50mm EF prime) for my 1000D, which has a 1.6x crop sensor. The 50mm acts as a 80mm(!) on my camera. I'm wondering if there are any adapters or anything similar to get me a smaller reach, somewhere close to actual 50mm. Am I out of luck? Or should I just get a 35mm? 80mm is quite restrictive for what I am doing.