Quote Originally Posted by polarbeardiggers
well jeff your very helpful,thankyou for that i was going to upload my pictures of both flashes from each camera but they were both right on,the digital d50 was set at 70mm lens,so did the flash setting as well,and when i adjusted the film camera f70d to the same 70mm so did the flash say as well on the back,i just believe that the sb600 is so newer to the film camera it could read better and send more power to the flash thats my view,or its the film being the full 35mm format picks up more light over the smaller cropped sensor in the digital, thanks for commenting.
I really don't know the answer about why the difference between the two cameras and flashes.

As far as taking a picture with the D50 and the center being right and the surrounding area dark I can tell you that something is not right. Would you post a picture taken with this setup and all the settings used so we can look at it. Also tell me the distance from you to the subject. I would like to try and figure it out if you want to work on it, Jeff