Hi, my name is andy and i'm new to this forum and also relatively new to photography. I'm hoping to get a bit of guidance from here. I'm having a few issues with my nikon D300 and nikon SB900. Why is it that when using the flash on top of my camera it doesn't use a higher shutter speed than 1/60th? I've set the flash sync speed to 1/320th FP but when i go into the flash shutter speed, it only goes upto 1/60th? I have my camera on aperture priority and the flash gun on Aperture also. Can anybody tell me where im going wrong? Thanks.