Yes this will fit the rebel T5. This is a professional level lens that will make the most out of any situation. It is designed for full frame sensors, but can be used fine with a crop sensor canon camera like the T5. Only difference is that running it on a crop sensor will effectively change the focal length of the resulting image. Images shot with the T5 won't be as wide as an image shot with a 5D or 6D using the exact same lens. But the 35mm focal length (and it's crop sensor equivalent) is an excellent length for portraiture, landscapes, street photography, and just about anything else. Also, 35mm focal length is the closest to the human eye in terms of image distortion and field of view. So if that helps you compose your shots, go for it. In terms of picture quality, you'd be hard pressed to find something better.