How to get rid of those auto-adjustments...

[MikePL]

Hello

I'm new to Silverfast and new to this site, so if my question is awful and basic, please don't shout 'duuuuuuh, moron !!!' but help me instead.

Let's get to the point:
I am using Silverfast at work, on an Epson 2450 Photo scanner. Most of the time I scan negatives and slides.
When I make a prescan, the window displays the film. Very often the colour and brightness are really OK, just like they should be. So I drag the mouse and draw a scan frame. When I release the mouse button, pooof, Silverfast adjusts automatically the colour and brightness. Most often the results are awful (very dark, greenish skin tones etc...). What should I do to prevent Silverfast from automatically adjusting the frame contents? I would like to do all these adjustments when I want and the way I want !!!

Very often I scan films consisting of pictures taken on the same background and the exact exposure settings (for example 36 studio pictures of model faces on white background). Almost every single frame differs from one another (and I spend hours adjusting it in Photoshop), whereas all the pictures on the negative have EXACTLY the same settings...
Please help... I am going to go nuts if I spend another week with Silverfast adjusting every frame for me !!!

Mike

[MikePL]

Check this out. Perhaps the pictures will explain what the problem is. These are cropped screenshots:



The picture above represents the result I get when doing a prescan and not touching ANYTHINTG. There is just a frame remaining from previous scans. The frame 'landed' in such a place that the prescan looks exactly as the pictures I was taking (the way I saw it through the camera and the way I overexposed it using measurements from my Minolta Flashmeter V). At this point I would like to LOCK these settings and proceed to selecting or moving my frame all over the place, but whenever I move the frame to a different place this happens:



As you can see, I did NOTHING else but moved the frame upwards and to the left. The frame grabbed a little bit of white space on the left and Silverfast changed the overall settings WITHOUT MY PERMISSION. The result is just crap !!! The girl looks pale, the white wall has catched some blueish cast and the girl's red hair is not as red as in reality (read: as in the image above).

What is going on? Is it something wrong with me? As you can see from the previous post, some hours have passed (I was reading the manual and browsing the net for solutions...). The main and MOST IMPORTANT feature of all programs is the possibility to make repeatable results. What I get so far is that every single frame is different in terms of colour cast and contrast.
I hope that I am terribly wrong and that the solution is somewhere, but I am too uneducated to find the proper button in the software...

Desperate Mike

[LSI_Flyvbjerg]

Dear Mike.

There is a "auto" checkbox in the NegaFix floater. Please switch it off.

Eric.

[MikePL]

THANK YOU !!!

I forgot that the negafix also has this expert mode icon and that there might be other things under there. You have just saved a life, because I was starting to have suicidal tendencies .

Thanks a lot !!!