Author Topic: The Contraption 10: The Cam Scanner  (Read 8566 times)

Francois

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The Contraption 10: The Cam Scanner
« on: January 26, 2011, 04:06:55 PM »
This is something I had in my mind for a very long time.
While my Epson scanner does a very good job at scanning negatives, I find it slow. Thing is, scanning at such high resolutions to get the most out of such a tiny piece of film is bound to be on the long side... But what if I could speed this up to, lets say, 10 seconds? Well, this was just the plan. The project had to give me the possibility to scan 4x5, 6x6 and 35mm, be extremely simple, give high resolution and natural colors. Well, this gave me most of those.

The original goal was to see if I could make a Fuji Frontier like high speed scanner from what I had lying around the house.

So, an old ceiling light, the can from an old computer power supply, an acrylic mirror that goes into lockers, a white plastic diffuser, wood, magnets, film holders for my big enlarger and the all important capture device, my little Canon Powershot.

The box works a bit like a slide duplicator, except the camera height isn't adjustable and the small positioning cradle I made will only fit the Powershot. The main reason why I opted for a point&shoot is that their macro capability is simply outstanding.

Now, you may wonder how I get to make an image without the ever so present orange mask of the color film? Well, the trick relies in using a long forgotten feature of all cameras: manual white balance.

The trick is to take the white balance on a clear piece of film. This will cancel out the orange mask. Then, all there is left to do is to take the image and invert it in Photoshop. For this experiment, I didn't play with the colors at all. All I did with the sample was invert the image...

While the results are not exactly what I expected, I must say I'm pretty surprised at how good the results are.

Here are a few pictures of the contraption
Francois

Film is the vinyl record of photography.

Francois

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Re: The Contraption 10: The Cam Scanner
« Reply #1 on: January 26, 2011, 04:08:14 PM »
Here is some of the other pictures
Francois

Film is the vinyl record of photography.

Phil Bebbington

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Re: The Contraption 10: The Cam Scanner
« Reply #2 on: January 26, 2011, 04:26:19 PM »
Brilliant! I admire your determination, François.

johann

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Re: The Contraption 10: The Cam Scanner
« Reply #3 on: January 26, 2011, 04:53:02 PM »
Impressive indeed ! The custom white balance trick is really awesome I find.
When do start selling internationally ?

The next step would be to be able to scan at high speed a whole batch of negatives ;)

astrobeck

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Re: The Contraption 10: The Cam Scanner
« Reply #4 on: January 26, 2011, 05:40:33 PM »
Is there nothing you can't build or improve upon?

Truly impressive!

 :) :) :)

sapata

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Re: The Contraption 10: The Cam Scanner
« Reply #5 on: January 26, 2011, 06:42:23 PM »
Amazing again Francois !!

Nigel

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Re: The Contraption 10: The Cam Scanner
« Reply #6 on: January 26, 2011, 08:29:19 PM »
Francois - I've said it before but I think you're fantastic! This appeals to me on every level, but most of all the fact that you got of your butt and did it!  ;D ;D
"Imagination is more important than knowledge." Albert Einstein

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Mojave

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Re: The Contraption 10: The Cam Scanner
« Reply #7 on: January 26, 2011, 09:03:20 PM »
This is amazing. I dont understand it one bit and Im so amazed that you created your own scanner out of stuff lying around your house. Seriously, my mind cant wrap itself around this.
mojave

Francois

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Re: The Contraption 10: The Cam Scanner
« Reply #8 on: January 26, 2011, 09:14:15 PM »
This is amazing. I dont understand it one bit and Im so amazed that you created your own scanner out of stuff lying around your house. Seriously, my mind cant wrap itself around this.
Just think of it as taking a picture of the negative :)
Francois

Film is the vinyl record of photography.

Mojave

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Re: The Contraption 10: The Cam Scanner
« Reply #9 on: January 26, 2011, 09:27:46 PM »
And then you invert it in PS?
mojave

Ed Wenn

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Re: The Contraption 10: The Cam Scanner
« Reply #10 on: January 26, 2011, 09:52:14 PM »
I'm smiling  :D :D This rocks!!

Francois

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Re: The Contraption 10: The Cam Scanner
« Reply #11 on: January 26, 2011, 11:18:57 PM »
And then you invert it in PS?
Yep... that's what the double picture sample shows :)
Francois

Film is the vinyl record of photography.

calbisu

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Re: The Contraption 10: The Cam Scanner
« Reply #12 on: January 27, 2011, 01:39:18 AM »
We the little ignorants bow in awe to Big Francois, which from now on shall be called Francois the Awesome one… OOOOaaaaahhhhh  :o :o :o :o

Stupefiant...

sethasaurus

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Re: The Contraption 10: The Cam Scanner
« Reply #13 on: January 27, 2011, 02:04:55 AM »
Nice job Francois.
I've been wondering about the quality of the images.
For example, do you think they're good enough to blow up for book publication? (I'm guessing the diffuser and camera resolution are going to be the deciding factors).
"Dear friends. My work is done. Why wait?"... 'BANG'
- George Eastman. Mar 14, 1932.

jojonas~

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Re: The Contraption 10: The Cam Scanner
« Reply #14 on: January 27, 2011, 01:57:52 PM »
damn! pro job there, francois :) I've been thinking and reading about ways to photograph film but since I got my new scanner I've been focusing on that instead, trying to optimise speed by scanning the whole strip as one photo and then cutting it up in ps (I thought it time consuming that the scanner always went back to start position between every frame)

but hey, you even managed to make the thing look good! :o
/jonas

Francois

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Re: The Contraption 10: The Cam Scanner
« Reply #15 on: January 27, 2011, 04:31:12 PM »
Well, when it comes to resolution for publication, the results are most probably good enough for the untrained eye. Still, there are a few things that nag me with my actual design... First is I miscalculated the distance required for a full frame picture (especially on the 35mm frame) which causes a very large rebate around the image. And second, the lens used in the camera isn't designed for flat field... so there is a possibility the corners won't be as sharp as on a scanner.

But on the other hand, this project proves something else: there's no excuse anymore not to scan negatives (especially if you're a bit handy and have a digicam in a drawer). This was super cheap to make. It could very well have been done with cardboard and vellum.
Francois

Film is the vinyl record of photography.