I was using my DSLR (D5200) to digitize some old negatives. Many articles stackoverflow helped with ideas. SO I have a backlit surface on which I place the negative & then take a closeup shot of the negative. I then copy the negative image to my computer & convert/reverse it to a positive through a freeware program (a java program).
My question is on the exposure settings for the negative. After I take a shot of the negative, the histogram tells me its quite underexposed (the graph is mostly to the very left), but when I view the jpeg after reversal of the negative to a positive I find the image I get is almost entirely burned out. I have to then use a image editing Software (ViewNX 2), to reduce the brightness (-99) to get to see a decent picture. Why do I have to reduce the brightness, is this normal or is there something wrong with my process.
Maybe this is the basic thing that is expected to happen when we turn negative images to positives, not sure.
What should be the exposure setting when I photograph a negative?