You can not call this "lens camera" with the current meaning. It's a kind of telescope that can be docked (with adapter) in a camera. Comparing with any Canon big white lens, the differences are evident:
It is much cheaper and lighter but;
There has autofocus and manual focus is very critical in supertele;
Does not have aperture control diaphragm, and are available only F8 (650mm) and F16 (1300mm);
Does not have image stabilization, and it is not feasible to hold in the hand, making the required tripod;
Bottom line: You can be a fun toy to make photos only static objects (like the moon), supported by very solid tripod and without strong wind, using shutter speeds faster than 1/1000. The images are not very sharp and has considerable chromatic aberration, but you can have some fun. Do not forget to buy the adapter for mounting the camera (T mount for Canon EOS).