Hello: Well I am having some trouble scanning some negatives with my Epson V500. I took a few moon photos so the negative looks like there is a black dot in the middle of the frame. When I try to scan them using my Epson V500 the images do not show up in the "preview" screen. Is there any way I can force the scanner to scan the entire negative strip instead of allowing it to pick and choose what it "sees?" Thanks!