SM stands for screwmount lens. Adapters are available for the Canon bodies. I've got one that I really like and would like to use it on a body that will meter with it on.
The reason I ask is that KEH does not tell me which bodies it will meter on and sometimes it's just easier to ask and get opinions. I didn't see any mention in the Canon museum as well. Thanks.
There's a thing that I've discovered with using adapted lenses on my EOS 3 that might help.
On the lensmount on the camera, there is a little switch (somewhere, maybe 10 o'clock looking at the body).
I'm not sure which way around it works because I don't have my body with me, but in short, if your adapter pushes this switch it (does / doesn't) expect an AF lens or adapter with a chip. If it does push this switch and your adapter (doesn't / does) have an AF chip, then it will throw a BC error.
Conversely, if it doesn't push the switch then the inverse is true.
(I think if it pushes the switch it needs the chip but can't confirm it until I get home).
Basically, no matter what adapter you get, if it doesn't work, you can solve the problem with either a toothpick and superglue, or by filing the adapter a bit.