I have a Nikon SB-15 that I used with my Fuji S1 and my Nikon FM. On the S1, the TTL metering seemed to work fine, however the S1 died and I replaced it with an S2. I've only experimented a couple of times, but the TTL metering on the S2 doesn't seem to work properly with this flash. I know it's all OLD, but I wondered if there was something I was doing wrong, or if I just need to buy a newer flash.