Posts Tagged ‘film

06
Sep
09

Just for fun: Cross-Processing

First off, this isn’t about cross-dressing, like the killer in ‘Dressed to Kill’. (Great movie. Lots of little plot details. Even a bit of a photography angle, in the form of character Peter Miller, who hides a camera to catch a killer.)

Nope, this is cross-processing; the intentional developing of one type of film in chemistry intended for another. You’ve seen the look; like Kodachrome, but more vivid, darker blacks, and blown highlights, and often incorrect or unnatural colors.

Cross-processed Fuji Sensia 100

Cross-processed Fuji Sensia 100

When I got the Diana F+ one thing that drew me to it were the samples; unreal colors and flaws that are really difficult to produce by editing digital, if only because of their apparent randomness.

My first couple of rolls were some Lomo 120, ISO 100. Not bad for outdoor use in bright light. But black and white; and I developed myself – the first time in 25 years, so a little lacking in deep blacks. But that’s another post.

My third roll, and one I was dying to shoot, was some Fuji Sensia ISO 100, a slide film. I had purchased it intending to use in the Kodak Stereo Camera on a mountain hike, but the hike evaporated, and there sat the Diana, just begging for some color film.

The first surprise is how hard it was to get it processed here in Calgary. Within 15 minutes of me are probably a half-dozen drug-store processing machines, all C-41 (print chemistry). What I had was slide film, or E-6 chemistry. I did a little leg work and found that neither WalMart or London Drugs would take it, first citing fears that I wouldn’t like the results, and second that it might somehow gum up their machines. I did a little reading after that, and found that the only film that’s likely to do that is Kodachrome – no longer available. (There are others, but likely to be in unmarked/self-loading 35mm cans).

In that search I found a local lab that would process it ‘wrong’ for me, but I’m going to have to keep it a secret; I don’t want a sudden influx of hobbyists flooding the lab because they don’t make much (if any) money from it. If you have a roll, live in northwest Calgary, just do some leg work (and a Google search). You’ll find it.

The next surprise was that the slide film came back as a negative… I hadn’t thought about it; all the shots that I’d seen online, even those with sprocket holes, seemed to be clear slide film. A thread over on APUG showed me the light; the chemistry dictates if the results are positive (slides) or negatives (for prints).

But it wasn’t an ordinary negative; the actual film substrate turned green. Yikes! Again, the APUG threads indicated this is normal-ish… for certain films, notably a few of the Fuji’s, like my Sensia. Ah well…

My next challenge was to scan it and see if I could invert it digitally. I was hoping to avoid any digital manipulation at all – and go totally lo-fi, but what the heck; I had an HP film/photo scanner, so let’s see what we have…

Step 1: Scan as Slide

The scanner did some pretty funky things to the scans if I told it to ‘scan as negative’, so I lied to it and said it was a slide. Also, for this sample strip I did NOT use the film loader; it hides the sprocket holes! I put the slide into a print carrier, which is just a bit of clear plastic with a white paper backing that is only sealed on one edge. Great for feed loading delicate items, like this. But the big reason why I like this way: I get sprocket holes.

What the film looked like from the lab. Ugh! (click for bigger version)

The scanner saves this as a TIFF file; which is perfect for more manipulation…

Step 2: Color Inversion

This is really straightforward: I loaded the image into the GIMP (think ghetto Photoshop) and selected ‘Invert’ from the Colors menu. That’s it.

Ooohh! Thats looking better...

Ooohh! That's looking better... (click for bigger version)

I saved this step as another TIFF file also, so I could come back to it if needed. These files aren’t high resolution, so the files are really small, about 2.4 MB.

Step 3: The Tweaks!

This is where things get personal. I used the curves editor to drop the red a few notches, and bump up the blue and green. In the curve grid I simply drag the point from the right hand corner; straight down for red, and straight left for green and blue. Play around until you get it ‘right’. It’s possible to actually get colors that are really normal – but where is the fun in that?

The result: Lomographic goodness.

The result: Lomographic goodness. (click for bigger version)

That’s really all there is to it. You’ll notice that I didn’t get the film advance right, and one frame is damaged. Meh. That’s part of the process. If you don’t want overlapping frames then take the time to load and count turns; I used about 1.25 turns at the start of the roll which was waaaay to few; and 2 turns in the middle  – waaaay too many; and about 1 turn at the end… which was about right. That sounds like a whole ‘nother post, so I’ll leave it at that.

My flickr page has a few more samples, sans sprockets. Comparing the two: Sprockets Rule!

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05
Sep
09

Another one bites the dust…

I just tried to have a roll of color slide film shot with my Diana F+ cross-processed at the local Royal Oak Wal-Mart in Calgary last night.

No Dice.

The kids looking after the photo counter were afraid of ‘ruining’ my film. That has to be one of the funniest things ever, since the chemistry of cross-processing has just that effect.

Ahhh…. kids.

So I thought I’d wait until later today, and see if I could get one of the nice day-shift techs at the London Drugs next door to take a stab at it. They were excellent with the oddball film from the Kodak Stereo camera, so this should be a breeze for them.

Update:

No dice at the Royal Oak London Drugs, either. They’d never heard of cross-processing, and thought it might damage their machine (ie, contaminating it’s chemistry). They thought they might be able to do it if they sent it into their custom lab, but I doubt that the lab would understand, either, and would either process it as slide (wrong) or cut it (wrong), or god knows what else.

Next stop… Vistek. The only camera store in Calgary that has ever been rude to me.

I’m sooo looking forward to this.

Not.

Update #2:

I now have a super-secret location for cross-processing.  I don’t know how long the good times will roll, but I’ll roll with them…

20
Aug
09

Visualize it. Dare ya!

I mentioned yesterday that if you visualize something, it will happen.

Today I’m the proud owner of a darkroom.

Yup, just like that …. *poof* and it appeared.

Well, actually I was Googling around for a developing tank, and found a classified on kijiji … a guy about a mile away from me was selling a complete darkroom setup. A phone call later and I was on my way.

It was like this weird light surrounded me and a voice said “This one’s for you!”.

I like when that happens. I should visualize more. Like an actual room to set this up in, for a start…

And the homework from yesterday? Due Monday. I have a darkroom to build.

03
Aug
09

More experiments with film; scanning and stereo!

Some time ago my Dad gave me a Kodak Stereo Camera as a novelty from one of his antique store forays. I’d wondered if it still worked, so I took it to the Lethbridge airshow. With lots of aircraft on static display, it would be a good place to try it out. It has some very limited settings for aperture and shutter speed, and focus is by guesswork, using a distance scale; the viewfinder is actually the square window between the lenses, just above the green bubble level.

Kodak Stereo Camera

Kodak Stereo Camera

Originally slide film would have been sent to Kodak and they would have cut and mounted the left and right images in cardboard to make them easy to use.  Keep this in mind if you have one of these cameras and would like to try it out… starting with slide film will save you a TON of time later on. All the unused film I have handy is 35mm for prints; not slides… had I known how much hassle I was about to cause myself I would have sprung for a roll of slide film for sure.

For starters, the images from each lens are almost square, and quite small. They are interleaved 3:1 on the negative, and that was the first hurdle. The photo lab couldn’t print or scan them because of the non-standard size… the tech tried, but the spacing didn’t match the standard mask sizes.

That left me on my own; I could go to a pro lab and explain to them what I wanted, and it would have cost a fortune in labour… or I could buy my own film scanner – but still have the same problems with needing non-standard image masks and having to realign every frame. What I ended up doing – photographing the negatives – was far more work, but the end results are (almost) worth it. If you get close enough to the screen and let your eyes cross the images below should fuse to a single 3D image!

Final result: A left+right image pair. Click for a larger size.

Final result: A left+right image pair. Click for a larger size.

After some failed experiments simply photographing the negatives against window light, I mounted a flash on one end of a 4 foot long bit of wood, my trusty K20D with a Tamron 70-300mm macro on the other end. One thing I had read about photographing negatives is that the orange cast of the negative can be best dealt with by gelling the lightsource to blue/cyan. I picked a strong blue gel from my freebie pack of Lee filters, and my first guess was pretty good (I think it’s #200 – Double C.T. Blue). I also put four layers of a white plastic bag in front of the flash as diffuser.

I mounted the negative at roughly the minimum focus distance. I used a folding cardboard slide holder taped against the bottom of a shoebox, with an oversized hole cut in the box. The flash was a few inches back from this, firing into the box to limit light spill. The camera was set to ISO 100 and f/11. Because of the spacing of the flash and camera I used some cheap eBay triggers; to keep the sync right I set it to 1/30 second shutter. The hotshoe trigger also gave me a handy mount for the flash.

The steps of transforming the negative to positive required some trial and error. These links should help:

http://photo.net/digital-darkroom-forum/00NFyc

http://www.velocityreviews.com/forums/t248544-digital-slr-as-slidenegative-scanner.html (scroll down to Dave Martindale’s post)

http://www.pbase.com/sinoline/35mm_slide__film_copy

A negative, lit from behind with a blue gelled flash.

Starting from the image above, here are my steps using the GIMP (Photoshop should work too):

1. Switch to the color picker, and choose an area of neutral orange (the sprocket holes, for example) or something known to be grey (like a cargo plane).

2. Add a new layer using this new foreground color

3. Invert the new layer from orange-pink to blueish. I ended up editing this blue tint to be Red: 0, Blue:255, Green:175, after experimentation. A different filter on the flash will mean these values will change!

4. Set the new layer to ‘Overlay’ mode. This should improve the color range, but it’s still a negative image.

5. Merge the new layer down (you should have only one layer now)

6. Invert the layer; it won’t be quite right yet, but it should be close

7. Edit the curves for red, green and blue individually; I just selected the midpoint and dragged it up or down very slightly. Also edit the brightness and contrast to taste.

Hope this helps anyone looking to scan or copy old negatives with their digital camera. For the money a good flatbed scanner, with masks for 35mm film is going to save you a lot of time.