Just got a EOS 620 new in the box, never opened for $100. Anyways I put it on the camera, but I see no preflash fire only the main flash. It aways seems to do one flash at near full power then I have to wait for the 1 sec recharge. This is all at 100 ISO and my 50mm 1.8. The confermation light comes on, but is that truly acurate. I am not going to waste a $10 roll of film to find out unless I have to if no one knows if this works. It is also set to TTL.