I had a Canon AE1 about 20 years ago that I bought all kinds of things for, one being a Macro lens. I smashed the Canon beyond repair about 10 years ago and now have a Nikon FM10. The "couplers" (I don't know their real names) that attach the lens to the camera are different. The best way I can explain it is that the Canon had a male body and the Nikon has a female body. Therefore the lenses attach differently. And finally my question! Do they make any kind of adapters to allow the Nikon to use the lens for the Canon? Second question. I'm buying a flash for the Nikon and it needs a module (modual?) to go with it. I was told, "Without the modual the flash is worthless." but when I asked what the modual does, they couldn't answer. Anyone know? Thanks! Lisa