Will all Canon EF lens work on the XTi digital camera? I have older Rebel G film camera with small Canon lens, a promaster 70-210 lens, and Quantaray for Canon 70-300mm LDO macro and the tird party lens do not seem to work on the XTi. Does the XTi only accept EF S lens? Or will any genuine Canon EF lens work on the digital XTi? I need help, I am new to this.