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PostPosted: Tue Jan 11, 2011 11:05 pm 
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Here the object is do as the Theme Title says.
Why?
To take full control of the negative scanning process.

http://www.computer-darkroom.com/tutori ... al_6_1.htm

I once found a better tutorial, but I cant find it again.


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PostPosted: Tue Jan 11, 2011 11:13 pm 
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Cheap kiosk veriety bulk film purchase, probably Fugicolor. Cheap kiosk processing. Scanned as positive. Inverted and some processing in Elements, and some further processing in Capture One. About a 50% crop.

The photo was accidently over exposed, and taken with either a Minolta Himatic 7 or a Canonet QL17, I can't remember. I know it was overexposed from looking at the levels while processing, but can't remember how much. Damn those old grey cells.


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PostPosted: Tue Jan 11, 2011 11:25 pm 
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Sometimes this technique gives you slightly more consistent scans when scanning E6 in C41 cross processed film other then that I haven't seen any improvements over using this technique in scanning c41 films on Epson flat bed scanners in fact it can increase noise levels because of lack of orange mask removal at the scanning stage.. Thats just my findings based on some experiments.

Here is my blog entry on cross processing.
http://blog.metrix-x.com/2009/11/cross- ... s-rip.html

<a href="http://www.flickr.com/photos/metrix_feet/4120392322/" title="Cross Processing Myths RIP by Metrix X, on Flickr"><img src="http://farm3.static.flickr.com/2590/4120392322_076ac0ecae_o.jpg" width="1000" height="667" alt="Cross Processing Myths RIP"></a>


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PostPosted: Wed Jan 12, 2011 12:10 am 
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On my Canon 8600 flatbed when you scanned a negitive it would only give you 8 bit data even though it could give you 16 bit for positives. This was a problem if you wanted to do something approching or similar to HDR and I have seen some stuff on the web doing this with B&W.
As to the orange mask I believe that is done in the driver (ie in software), and not in the scanner, so I would be checking into where that noise is coming from in your post processing.

Vuescan provides a number of profiles for scanning negs, but there is a shortage of profiles for Fugicolor films, and those that are there are I believe for older films. These profiles are basiclly for the orange mask removal and I always had trouble scanning Fugicolor on the Canon and even more so when the exposer was off. I have now bought a dedicated film scanner (Prime Film 7650U) and we will see what we will see.


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PostPosted: Wed Jan 12, 2011 12:50 am 
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Oh yah, the photo I posted here was from the 7650U


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PostPosted: Wed Jan 12, 2011 12:51 am 
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walkaboutcamera wrote:
On my Canon 8600 flatbed when you scanned a negitive it would only give you 8 bit data even though it could give you 16 bit for positives. This was a problem if you wanted to do something approching or similar to HDR and I have seen some stuff on the web doing this with B&W.
As to the orange mask I believe that is done in the driver (ie in software), and not in the scanner, so I would be checking into where that noise is coming from in your post processing.



Never liked canon scanners thats why I sold mine. Epson scanners are 16 bit (actually around 14 usable bit scans) both positive and negative. 48bit colour scans show a smooth and continuous 16 bit per channel histogram Scanners (epson at least) work on adjustable gain and offset hence they remove the majority of the mask at a hardware level and the noise (more like lose of resolution) was definitely not coming from the post. The article you referenced is a bit out dated.

Software like vuescan maybe makes it easier to get consistency but doesn't achieve any better results then can be achieved with the epson scan software and carefully scanning.

I'm not saying you can't do it by scanning a negative as a positive, I'm just saying that with epson there are no advantages in resolution or control with a normal c41 negative.

As for B&W I routinely extract high dynamic range information from a negative. Tmax film can capture up to 19 stops (not bits) of image.


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PostPosted: Wed Jan 12, 2011 12:56 am 
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Metrix wrote:
As for B&W I routinely extract high dynamic range information from a negative. Tmax film can capture up to 19 stops (not bits) of image.


That would make a good theme, and perhaps an opportunity to get a another tutorial from you. :wink:


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PostPosted: Wed Jan 12, 2011 1:14 am 
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walkaboutcamera wrote:
Metrix wrote:
As for B&W I routinely extract high dynamic range information from a negative. Tmax film can capture up to 19 stops (not bits) of image.


That would make a good theme, and perhaps an opportunity to get a another tutorial from you. :wink:


Actually another of my blog entries shows a simple method

http://blog.metrix-x.com/2010/09/fun-wi ... -from.html 8)


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PostPosted: Tue Jan 18, 2011 12:59 pm 
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Fugi Superia 200
Cheap Kiosk Development
Scanner Primefilm 7250U
Scanned as Positive
PS Elements- Inversion Only
Processed in Capture One Pro 6


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