Re: Scanning for Stitching with Vuescan

Ed,

I thought about locking the film base color but how do you do that
with a 16 bit grayscale scan? With the media type set to B&W negative
I can see the menu with exposure lock but I don't see any thing for
film color lock. Is that describdd in the VueScan user's guide? The
negatives do have a lot of color, though, as they are pyro stained.
But even a partial scan of a 12X20 at 800dpi in RGB is much too large
to work with.

It does help a lot to set the clipping to 0 but with the gray scale I
did not figure the color settings mattered.

BTW, I have a solution for your scanning. It is called the Epson
4870, with a transparency scanning area of 6X9". I just got one of
these to replace my 2450. And the 4870 is super for medium format
negatives. I have done a few color prints from scans of 6X9 cm Fuji
negatives and the quality is just outstanding. I have not used it yet
for 35mm scanning but reviews indicate that you can come very close
to the quality available from some dedicated 35mm scanners,
especially if they are over a year or so old.

Sandy

>Sandy, I feel your pain. I'm about half way through a project of scanning
>260 5x7 glass plates on my 2450 and I'm having the same problem. I have had
>some success by setting clipping to 0, the color adjustment is set to none,
>the white point to 0 and the leaving remaining sliders on the color
>adjustment screen set at 1.
>
>I asked Ed about this and here's his response:
>
>You also need to lock the film base color. It's varying with
>each scan, which causes the problem you're seeing.
>
>This is described in more detail in the VueScan User's Guide,
>in the "Advanced Workflow Suggestions" section.
>
>Regards,
>Ed Hamrick
>
>
>
>
>----- Original Message -----
>From: "Eric Neilsen" <e.neilsen@worldnet.att.net>
>To: <alt-photo-process-l@sask.usask.ca>
>Sent: Saturday, February 21, 2004 9:38 AM
>Subject: RE: Scanning for Stitching with Vuescan
>
>
>> Sandy, Not being a Vue Scan person and using my Epson 3200 - Is it
>possible
>> that your scanner is giving too different exposure based on the heat of
>the
>> lamp? The Epson warms up before scanning and before you calibrate it if
>> needs to be fully warmed up. Can you reverse the order of scanning or do
>an
>> additional scan of your first 1/2 of the negative?
>>
>> Eric Neilsen Photography
>> 4101 Commerce Street
>> Suite 9
>> Dallas, TX 75226
>> http://e.neilsen.home.att.net
>> http://ericneilsenphotography.com
>>
>>
>> > -----Original Message-----
>> > From: Sandy King [mailto:sanking@clemson.edu]
>> > Sent: Saturday, February 21, 2004 9:56 AM
>> > To: alt-photo-process-l@sask.usask.ca
>> > Subject: Scanning for Stitching with Vuescan
>> >
>> > I am using the Vuescan software to scan 12X20 images with my Epson
>> > 836XL 12X17 scanner. This has to be done in two passes and I stitch
>> > the files together in Photoshop.
>> >
>> > I am having a problem. After the first scan I lock the exposure down
>> > so that in theory there should be no difference in density between
>> > the first and second scans. In practice, however, there is enough
>> > difference in density between the two scans so that when they are
>> > stitched together one side is visibly lighter than the other.
>> >
>> > Since there are a few Vuescan users on this list I am hoping that
>> > someone with more experience with the software than me can explain
>> > what I need to do to get equal exposure on both scans.
>> >
>> > Sandy King
Received on Sat Feb 21 13:00:32 2004