>Hi Gary. I indeed use the flash as fill. This is what I do >in an evening where I would have a nightclub type lighting: >(please supply comments to improve my system) > >Aperture Priority (if not then Speed on 1/8 or 1/20th) >f/stop wide open >Turn off Noise correction in camera >Make sure to have SPOT metering active (optional)
The camera cannot be in Spot metering mode when using TTL-BL. This is because the metering in the camera has to read the entire frame (or most of it in the case of Center Weighted metering) in order to be able to calculate the proper power for fill.