I don't think he will have much luck with that scope. Unfortunately, the focuser only uses 1.25" eyepieces so he won't be able to attach the 650D to it for prime Astro photography. And also I know that on that scope he won't have enough inward travel to come to focus.
He could do afocal photography, where he could take photos by using the camera aiming down the eyepiece. There are adaptors and eyepieces that allow this, but I don't know much about them to be honest as I have never used them.
And he would be limited to a maximum of 30 sec exposures, even with the tracking computer as it is only on an Alt-Az mount and not a equatorial.
Hope this helps and sorry I could not offer any more advice.