I decided to shoot some slide film in my Nikon F100 I wanted to be careful with the exposure so I took an incident reading with my hand held and also a reading through my F-100 The F100 was 2.5 stops more exposure than my hand held. I went and got my Nikon D300 and it was exactly the same as the hand held so I tried my Nikon F4 and it was the same as my F100... I know the hand held is right on based on all of the shots I have taken with my RB67 and my 4x5. Any ideas what may be going on????