I just got my hands on a Canonet G-III QL17 and am having some battery issues. I've tried both an Wein cell and a 675 in the MR9 adapter and neither seems to power the camera. However, a 625A (1.5v alkaline) works just fine. So, I'm off for a day of shooting Kodak Gold 200 tomorrow and need to know what ASA to set. With my F-1, I'd set it at ASA 80 - the same for the Canonet?