No. A Canon XL1 lens is not compatible with Canon DSLR bodies like the 5D or 7D.

The XL1 lens was designed for a camcorder system with a much smaller image circle, and it sits closer to the sensor than an SLR/DSLR lens can. Canon DSLR bodies use EF or EF-S mount lenses that must leave room for the camera’s mirror, so the XL1 lens will not mount or function properly on those cameras.

If you want to shoot 1080p HD on an EOS DSLR, you’ll need DSLR lenses instead—typically EF or EF-S, depending on the camera body. Also, 1080p video only requires about 2 megapixels of resolution, so standard Canon DSLR lenses have more than enough resolving power for HD video.