Question about Canon Rc-6

Yes, the older versions like the RC5 would also work. Note, however, that it is an infrared connection that requires a line of sight. That's why the RC-5 is lying around unused at my place, because I bought a remote release via radio after all. Not the original Canon one - that was too expensive for me - a Phottix, which can do much more than this part for not much more money. But if you only want to trigger the camera on the tripod without touching it and you are standing right next to it/ in front of it, that would be OK.