A couple of i900 film scanning troubles

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jonhp
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Scanner: Microtek i900
SilverFast Product: Ai
SilverFast Version: 6.5

A couple of i900 film scanning troubles

Postby jonhp » Tue Jun 14, 2011 3:55 pm

hi,
i am having a couple of film scanning issues:
1 - even after calibrating silverfast Ai Studio 6.6.2r4a with a new kodachrome it8 target, the scans have a "blue-ish" cast.
2 - film negatives, b&w and color, appear over-exposed; they require a -3 setting on the Negafix exposure control.
hope someone has some ideas...
Jon

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LSI_Ketelhohn
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Re: A couple of i900 film scanning troubles

Postby LSI_Ketelhohn » Mon Jun 20, 2011 9:14 am

Dear Jon,

For your Kodachromes try using the "H-S Cast" image type.
There are several Kodachrome films and some require a more intensive color cast removal.

Make sure the scanframe for your negatives is exactly placed around the image content.
In case there is any unexposed film material inside the scanframe the automatic will not work correctly.


kind regards,
Arne Ketelhohn.

jonhp
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Posts: 5
Joined: Thu Jun 02, 2011 10:34 pm
Scanner: Microtek i900
SilverFast Product: Ai
SilverFast Version: 6.5

Re: A couple of i900 film scanning troubles

Postby jonhp » Mon Jun 20, 2011 11:03 pm

Hi,
Haven't tried the Kodachrome test yet.
I did try the negative suggestion and it didn't help; made sure all of the scan frame was inside the negative borders.
However, I did set the gamma to 1 (from 2.2) and that really made a difference; they were not nearly so overexposed.
Is this what I am supposed to do for negatives?
thanks, jon

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LSI_Ketelhohn
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Re: A couple of i900 film scanning troubles

Postby LSI_Ketelhohn » Fri Jun 24, 2011 3:17 pm

The correct Gamma mainly depends on your used display system.

Current Macs and PCs use a gamma of 2.2.
Older Mac systems use a gamma of 1.8.

A gamma of 1 would be an unadjusted value.

In case you are using our ArchiveSuite workflow make sure you did not activate the gamma for HDR setting in your SilverFast Scansoftware or tell SilverFast HDR which gamma to expect.
These options can be found in the options general tab of each software.

kind regards,
Arne Ketelhohn

jonhp
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Posts: 5
Joined: Thu Jun 02, 2011 10:34 pm
Scanner: Microtek i900
SilverFast Product: Ai
SilverFast Version: 6.5

Re: A couple of i900 film scanning troubles

Postby jonhp » Sat Jun 25, 2011 12:28 am

For HDR output is NOT checked.
And the overexposed scans, only with negatives, occurs during prescan as well as in the final scan.
Do you folks have an i900 that you can try this on?
thanks, jon


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