Quote Originally Posted by ColdEye View Post
Do I need to increase exposure times to get a usable pictures out of the "thin" negatives?
Thin negs can scan surprisingly well. They are in many ways preferable to denser negs (for scanning, not printing).

For contact sheets, I keep a small collection of black foam core in 2.25" wide strips and squares. If I have negs like yours where the lighting varies, I just place the strips/squares on top of the negs that need dodging and then add time for the other negs. It's pretty easy and intuitive. Definitely worth it to have balanced contact sheets when reviewing negatives months or years later.