Plustek 8200i lines in dense negative scans

[bmxhag]

I have an issue when I am scanning dense negatives. The mid tones have vertical lines running through them. They do not appear in lighter and darker parts of the image. Is this a hardware issue?

The vertical lines are not present on the negatives to be clear.

Thanks for any help provided.

[LSI_Ketelhohn]

Dear user,

that is difficult to say without seeing the issue. but lines in scan direction are most likely a device issue. Make sure you are using the latest driver and SilverFast version. On a Mac the driver will automatically be updated by SilverFast. On PC please download it from the Plustek website.

kind regards,
Arne