the Auto function

[newedb]

I am using SilverFast Se Plus with Plustek 7500i.

In the NegaFix dialogue window, there is an auto function check box. As far as I understand, when enabled, it will automatically adjust the overall brightness depending on the tolerance. So when disabled, it should do no adjustment at all. But my observation is this, I prescan a picture with auto disabled, I am not very happy with it, so I enable the auto function, change the tolerance slider, it somehow makes the picture worse, so I disable the auto function again. Now I expect to see the original picture I first saw in the very beginning before I enabled the auto function. But that's not the case. The picture stays what it was in the last step when auto was enabled.

My question is how can I completely disable the auto function after it's enabled?

Thanks.

[LSI_Morales]

Dear Newedb

You can use the reset button present in the main adjustments window of SilverFast.

Cheers

[newedb]

Dear Newedb

You can use the reset button present in the main adjustments window of SilverFast.

Cheers

But that's going to reset the other settings as well, right?

[LSI_Morales]

Hi newedb,

But that's going to reset the other settings as well, right?

I am not quite sure about this but I believe, if you use the reset once, you will undo the last step, if you press and hold the "shift" key and then click the reset, you will reset all other adjustments.

I'd like to clarify something from your original post:

In the NegaFix dialogue window, there is an auto function check box. As far as I understand, when enabled, it will automatically adjust the overall brightness depending on the tolerance.

The overall brightness is not adjusted by the Auto-tolerance. The Auto-tolerance adjusts the strength of penetration within the orange mask detection to include more or less details in the histogram, all this for every channel independently.

The histogram does not expand within the entire range of the orange mask of the negative stipe, and the expansion is different in every channel (r,g,b).
If your negatives have small scratches or dust, these regularly fall outside the picture histogram, Auto-tolerance allows you to adjust the threshold of detection to either include those details and expand the histogram over a broader range (but also prone to strange color effects or defects because they are different for the three channels) or to exclude those details and expand your histogram more (the risk here is to clip the some parts of your image, but color tends to be more precise).

This can be appreciated with SilverFast with the NegaFix expert dialogue extended. Since SE Plus does not have an expert dialogue option, you can scan a file as 48 bit HDR (to create an unmodified raw file) , then download and install the demo version of HDR studio, you will then open the file and using the NegaFix dialogue, you can open the expert mode and see the histogram and how the Auto-Tolerance works.

To compliment this you can check our user manual pgs: 223, 226, 227

Cheers

[newedb]

Dear Newedb

You can use the reset button present in the main adjustments window of SilverFast.

Cheers

where is that button? I can't find it somehow.
Thanks.

[LSI_Morales]

Dear Newedb,

The reset button is found on the lower part of the main settings window.

Reset button on Mac

Resetbutton_Mac.jpg (27.48 KiB) Viewed 2123 times

Under Windows you just press and hold the "shift" key and the options button will change to "reset" or the combination "shitf + ctrl" switches to "reset all".

Cheers