120tf and Multi Exposure

[LSI_Muenier]

Dear Rocky,

IT8 calibration will have no effect on the alignment procedure.
When I checked the AS120tf at 2000 dpi recently, I was not able to generate a misalignment. I am in contact with SilverFast users to find out why their scans come out different from my findings.
(When I speak of 2000dpi, then I assume that the scale in SilverFast is 100%. Otherwise a different effective resolution
would be acquired from the scanner, which for scales above 100% would result in 4000dpi scans.)

Best regards
Martin

[Rocky]

Hi LSI_Muenier,

Thank you for your reply. I thought to provide some clarification to my recent post and your response.

The test scans that I performed were set at 2000 dpi with a scale of 100%, and these scans were only to test the software! Otherwise, I perform scans at 4000 dpi without exception.

[Rocky]

Most interestingly, I have found that the current SilverFast version 6.5.1r2 provides a correct ME Scan at 4000 dpi (100% scaling & 48 Bit HDR Color) with no alignment issues. This is surprising since I have found no mention of significant changes in the software or notations from other members on this forum regarding this issue since the latest update. I can only hope that my results are not a quirk from my simple tests. Time will tell.

It would be most useful if other members who have experienced issues with ME should post their results.

[Johannes]

Did you recognize any other differences? For example a quality improvement? If not, maybe it does NOT work at all.

[LSI_Muenier]

Dear Rocky,

scans with Multi-Exposure might work by chance for resolutions above 2000 dpi, but because of a firmware problem in the scanner I have seen erraticly stretched images when scanned with higher exposure than normal at a resolution above 2000 dpi. SilverFast then cannot successfully combine the partial scans into one Multi-Exposed image.
Below 2000 dpi no such stretching occurs.
Please note, that I talk of the actual scan resolution, here, i.e. the output resolution times the scaling factor.

Best regards
Martin

[Johannes]

In the case it is a firmware problem, is there a response from the supplier (Microtec) to fix that problem? Do there exist the same problems with the 4000tf? Thank you for opening a perspective.

[LSI_Muenier]

Dear Johannes,

we have asked Microtek about this, but no firmware fix is to be expected, unfortunately.
As for the 4000tf, we currently do not offer Multi-Exposure for this scanner.

Best regards
Martin