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by degrub
Mon Sep 20, 2010 10:04 pm
Forum: All other problems
Topic: Vertical color banding problems
Replies: 11
Views: 3919

Re: Vertical color banding problems

Are the lines parallel to the scan motion or orthogonal to it ? If parallel, could have a sensor issue (dust in the light path for example or in the calibration area) if orthogonal, then the fluorescent light source may not fully warmed up - usually 20 minutes or more, longer for older tube. Or the ...
by degrub
Mon Aug 30, 2010 6:06 pm
Forum: Imaging in general
Topic: Scanner suggestions
Replies: 4
Views: 856

Re: Scanner suggestions

For publishing quality scan, go with the Nikon 9000. It does much much better than the 5000 or the 8000 and other earlier models. It appears that the light source is a little more diffuse and this helps getting detail out of the darker portions of images and avoids the problems of the LED sources. T...
by degrub
Thu Aug 19, 2010 4:23 am
Forum: Imaging in general
Topic: 16-bit greyscale scans only record 8 bits
Replies: 8
Views: 3437

Re: 16-bit greyscale scans only record 8 bits

Just a shot in the dark - try deleting the Silverfast preferences files and make a scan. i've seen that cure some strange behavior before.

If that doesn't change things, what does the Silverfast histogram show ?
by degrub
Mon Aug 16, 2010 11:33 pm
Forum: About SilverFast
Topic: Which "internal" profile should I use?
Replies: 8
Views: 1913

Re: Which "internal" profile should I use?

Tom, Welcome to the toughest problem in reproducing images. Have a read over at Luminous Landscape in the color management forum. http://www.luminous-landscape.com/forum/ One can do pretty well on the scan and display on computer. Life gets more difficult when you print since there is a transformati...
by degrub
Wed Aug 11, 2010 7:54 pm
Forum: About SilverFast
Topic: Which "internal" profile should I use?
Replies: 8
Views: 1913

Re: Which "internal" profile should I use?

According to LULU you can ship them images in CYMK. https://support.lulu.com/Question.jsp?id=16c224bdbe4eb7657001fe83d37c13db So work on the image in any of the color spaces you prefer. For web display sRGB is pretty universal. If you convert to CMYK and do a soft proof, you may get close to what th...
by degrub
Wed Jul 21, 2010 2:26 pm
Forum: About SilverFast
Topic: Why no IT-8 target for Fuji Velvia?
Replies: 2
Views: 1050

Re: Why no IT-8 target for Fuji Velvia?

The spectral transmission curve of Velvia is very similar to the Kodak E6 film used for most IT8 transmissive targets. So no need for a specific Velvia target. Although if i remember correctly, there was an individually produced target service by Fuji for a few years. Terribly expensive for a very s...
by degrub
Wed Jul 07, 2010 12:58 pm
Forum: HDR (48bit HDR processing)
Topic: HDR Gamma setting
Replies: 5
Views: 3395

Re: HDR Gamma setting

Try working in Lab color space and see if you get better results. Then convert into RGB.
by degrub
Tue Jun 22, 2010 1:37 pm
Forum: About SilverFast
Topic: A question of calibration
Replies: 7
Views: 1954

Re: A question of calibration

also, your fluorescent light source is likely to have aged and may give you a different spectral output from what it had new.
by degrub
Fri Apr 30, 2010 11:40 pm
Forum: Imaging in general
Topic: Old BW negatives - how to handle?
Replies: 7
Views: 3143

Re: Old BW negatives - how to handle?

consider in investing in a wet mount scanning setup on your epson. There are kits available. Reduces the need to dust and scratch remove on old silver process film.

http://www.historicphotoarchive.com/stuff/wet.htm

search wet mount epson . THere are several suppliers.

regards,

Frank
by degrub
Fri Apr 16, 2010 10:42 pm
Forum: About SilverFast
Topic: Vertical bands
Replies: 3
Views: 781

Re: Vertical bands

Are the bands along the direction of scan or orthogonal ?

If along the scan do they repeat at the same pixel location when it happens ?
by degrub
Wed Apr 07, 2010 1:05 am
Forum: Imaging in general
Topic: Simple Instructions for Archiving 35mm Color Negatives
Replies: 11
Views: 3872

Re: Simple Instructions for Archiving 35mm Color Negatives

Have a look at Ian Lyon's tutorials for Silverfast. Not the current version , but the basics are there.

http://www.computer-darkroom.com/sf5_contents.htm

www.scantips.com offers basic scanning information.
by degrub
Tue Mar 09, 2010 1:50 am
Forum: Imaging in general
Topic: New User Manual
Replies: 3
Views: 1513

Re: New User Manual

For the basics, have a look at Ian Lyon's tutorials.

http://www.computer-darkroom.com/sf5_contents.htm

supplement those with the manual.

http://www.organiclightphoto.com/techni ... .asp?num=6

also has some specific tips.
by degrub
Mon Jan 04, 2010 4:55 pm
Forum: Imaging in general
Topic: Color Settings for HDR Scans
Replies: 4
Views: 1068

Re: Color Settings for HDR Scans

Read Ian Lyon's tutorial on CMS and Silverfast.

http://www.computer-darkroom.com/sf5_contents.htm
by degrub
Mon Jan 04, 2010 4:50 pm
Forum: Nikon
Topic: A Simple Question re resolution/quality settings
Replies: 2
Views: 1192

Re: A Simple Question re resolution/quality settings

The test results i have seen for the 5000 suggest an optical resolving capability of around 2700 ppi. Any scan above that is oversampling and might result in artifacts. i generally scan at the sensor capability - 4000 ppi and down sample to whatever resolution i need in PS. Unless i try to enlarge t...
by degrub
Thu Dec 03, 2009 3:49 am
Forum: Nikon
Topic: Which Calibration Target?
Replies: 5
Views: 1332

Re: Which Calibration Target?

Are you scanning transparencies or negatives ?

topic51.html?hilit=fuji%20film%20calibration

some relevant comments in above on Fuji

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