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Underexposed Slide Scans using Multi-Exposure and 48 bit HDR
PostPosted: Tue Apr 06, 2010 7:08 pm
by mbrick
I have an Epson V750 with Silverfast AI Studio ME, version 6.6.1r6, and all of my 35 mm Kodachrome slide scans are badly underexposed. I scan in 48 Bit HDR Color with the Multi-Exposure feature activated and an assigned scan resolution on 3200 dpi with a scale of 100%. I have not applied any other Silverfast features except the Multi-Exposure but my scans are much darker than the slides are when viewed in the Prescan window. What am I doing wrong?
Re: Underexposed Slide Scans using Multi-Exposure and 48 bit HDR
PostPosted: Wed Apr 07, 2010 7:48 am
by LSI_Morales
Dear mbrick
Your pictures look darker not because of Multi-Exposure. They look darker because you are scanning in 48 bit HDR mode which creates unmodified raw files with a linear gamma value of 1.
The idea is to have a file which serves as a "digital negative" preserving all the information read by the scanner, this type of file should be later used for post processing in an editing program like SilverFast HDR Studio.
Cheers
Re: Underexposed Slide Scans using Multi-Exposure and 48 bit HDR
PostPosted: Wed Apr 07, 2010 1:52 pm
by mbrick
Thanks for the quick response.
I have been saving my HDR scans in TIFF format is that okay? I do not have Silverfast HDR Studio but, I do have Photoshop CS3 which I use for my photo retouching is there another file format I should be using to save my scans?
Re: Underexposed Slide Scans using Multi-Exposure and 48 bit HDR
PostPosted: Thu Apr 08, 2010 7:52 am
by LSI_Morales
Dear mbrick,
It is OK, you can edit your files using photoshop but make sure you apply a gamma correction (some people call that tone mapping).
Cheers