Another SilverFast / CS3 question for the knowledgable masses.
I use SilverFast Ai Studio and have just started shooting and scanning 4x5 B&W film. I have confirmed, at least for me, that the best scans from my Epson 4990 come from scanning only the green channel at 16-bit grayscale with the levels adjustment set to the endpoints of the histogram.
My problem is that I cannot seem to get SilverFast to allow me to tell it that I want to scan a negative instead of a positive transparency. So far I have simply left the setting as positive and then inverted the image in CS3. However, this method seems to leave a lot to be desired because I have to make considerable adjustments in exposure and gamma to make the inversion look right after getting a virtually perfect scan. There must be something wonky in the inversion process.
As far as trying to get SilverFast to allow me to set the scan as a negative, it won't let me. When I select "Negative" in the General Tab up pops the NegaFix window with some film choices that don't help at all. I am currently shooting Fuji Acros which is not on the list (neither are any other B&W films), so whether I select "Fuji" or "<other>" in the film manufacturer drop down and then select <other> in the film type dropdown and close the window, the Pos/Neg selection reverts to Positive. I cannot find any way to get the selection to stiick as Negative.
If anyone has solutions to either of these two issues I would be most appreciative.
1) How to convert a positive B&W to a negative correctly in CS3.
2) How to get SilverFast to let me scan a B&W negative.