This list can be viewed here:
https://www.silverfast.com/show/negafixprofiles/en.html

This effect may occur with some negatives and is due to the default values of the NegaFix Auto tolerance (NegaFix > Expert dialog).
Workaround: increase the auto tolerance in the NegaFix dialog.

a new scan mode in SilverFast(NikonM) Ai and SE software - SF ver. 5.5.2r15(Mac)/r20(Win).
applies to: LS30/40/2000/4000/8000

Why did LaserSoft-Imaging add this new negative mode to SilverFast for Nikon film scanners ?
This mode should basically help all those users facing problems in the achievement of good quality scans from their negatives.

The common reasons for such problems are:
- film type is not supported by NegaFix.
- film type is supported but quality is not satisfying.

NegaFix quality may suffer, due to the indirect communication with the Nikon hardware. Therefore, LaserSoft-Imaging added this negative "direct" mode (Neg.:direct) for those cases where quality just don't meet the usual expectations.
In this mode SilverFast will NOT apply it's NegaFix data corrections and will instead rely on the Nikon Maid libraries for better negative analysis.

Limitations:
it is NOT possible to switch mode when working with images from a job queue in the SilverFast JobManager. You cannot change to positive or to the other negative mode. This means for negative Job-scanning that the desired negative mode (NegaFix or Neg.:direct) must be chosen BEFORE you start the SilverFast JobManager.

SilverFast default setting for negativ scans is: NegaFix.