I was (quite luckily) given a Leica M3 double stroke a couple of years ago, and just recently got the adaptor so I plug a standard PC cord into the proprietary Leica X-sync flash contact. After some experimenting, I've found that the flash will only fire when the shutter speed is at 1/50 or higher. When I set it at 1/25 and lower, it will not fire. Since this is a focal plane shutter and presumably doesn't sync any higher than 1/50, this doesn't make any sense. Flash isn't going to cover the whole frame at higher speeds. But being able to use speeds below 1/50 to drag the shutter to pick up ambient fill could be useful. So is this normal on an M3? Or is something wrong with my camera?