Recently acquired an Epson V500 for scanning film. When scanning b/w negatives I'm finding there is no way to get just a straight-line scan, i.e., a straight line from darkest to lightest tone in the negative. The film already has a response curve typical for that particular product, and I just want to be able to transfer that curve into Photoshop without any additional modification. I use the Epson software in Pro Mode, and I've tried manipulating the various controls but I'm unable to find a way to get this straight-line scan. Any suggestions welcome, including buying a different software. My old Microtek would do a straight-line scan of anything, but it would not accommodate 120 negatives.

Thanks in advance,