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Yes
Sorry, there was a problem. Please try again later.This will fit the Rebel XSi and every other Canon DSLR except for the M-series. In that case, you just need an adapter. It is a great lens that will most likely not see an upgrade for 10+ years, so you can't go wrong.
Sorry, there was a problem. Please try again later.Yes.. but whether you're excited aboit this fact or not, because the sensor on the rebel is smaller than a 35mm frame, your focal length will not be 100-400, it will be 1.6x longer. It'll be 640mm on the long end.
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