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  1. #1

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    Stereo photography?

    Hi,

    I've trying to find anyone on the board who has experience of taking stereo images...not sure of the correct area to discuss it, really.

    The story is this:

    There is a massive craze in 3D films at the cinema at the moment.
    Trouble is, I can't see 3D

    I had a squint when I was little. I had surgery when I was about six to correct it and my eyes work pretty normally, now. I can superimpose two images, but I never developed the brain function to construct 3D.

    If I look at those test charts of coloured dots with the green and red glasses on? Where you are suppossed to see the Bunny? Nothing. Same with side by side spectoscopes (the victorian way of doing it) or those jumbled up dot pictures. Absolutely nothing...

    Except... I can in black and white. I was in an opticians about 2 years ago and instead of using the usual colour chart they used a black and white image of a fly and glasses with polaroid lenses. Suddenly WOW! 3D! :o
    For forty years I thought I had no 3D perception and then suddenly - 3D! Difficult to decribe the shock I got from that...

    No idea why B/W - polaroid works, but colour with Red/Green doesn't work at all.

    Not sure what would happen with colour using polaroid filters or some other technique, either.

    So -I want to experiment with my own eyesite a bit. I'm interested in knowing what I can and can't see and why. I'd really like to have a go at making some stereo polaroid images.

    Anyone got any ideas how this is done? Anyone ever tried it? I've had a google, but couldn't find much. There's a fair write up of the theory in wikipedia, but nothing on DIY pictures (Plenty on anaglyphs, the red/green technique - very little on other techniques).
    Last edited by steven_e007; 03-05-2010 at 03:45 AM. Click to view previous post history.
    Steve

  2. #2
    phaedrus's Avatar
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    stereo vision

    Mind you, I don't want to discourage you from your experiments, but from your very well described symptoms one can deduce that you have limited stereo vision.
    The Titmus "Fly" stereotest that you saw threedimensional presents the two images at a stereodiscrepancy of 1000 seconds of arc. That's a lot. Any eye specialist (I'm one) can examine your stereo vision with tests of diminishing stereodiscrepancy to find out your treshold. The result is given in seconds of arc for the last test you saw thredimensional and is relevant for some occupational tests and aeronautical licenses.

  3. #3

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    Hi Phaedrus,

    Thanks for the reply. I have looked at colour anaglypt tests where the subject have different discrepencies and I can't see any of them at all. The "fly" I could see very easily. I am assuming that I have seen a colour image of the same angle of discrepency so it appears that for some reason I can see Black and White better than colour. I wondered if this is because the rods in your retina are distributely more widely than the cones? Don't know.

    I'd love to have a test on a synoptophor but alas, in the UK opticians are private practices primarily concerned with making spectacles and screening for problems. As soon as they find a convergence problem it would be off to see an optometrist (don't know if this is the same wherever you come from?) under the control of the National Health Service. Since I am only interested in my eyesite and do not have a real problem I couldn't expect to, and wouldn't be, refered to an optometrist to be tested. I could probably pay for a private consultation, but I'm sure that would be serious money - and I'm not that interested!

    Anyway, my OP was to see if anyone has any experience of making BW polarioid stereogrammes. The internet is full of instructions on colour anaglypts from digital images using photoshop and a digital printer - which is not only not what I'm after but strictly off topic for APUG.

    I was hoping to do things properly with some polaroid filters on my camera and under my enlarger
    Steve

  4. #4

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    Can I ask... are you colour blind? That would impact your results with the colour 3D tests.

    As for making stereographs, I love to make them.

    For the camera, I have used an old 127-format stereo camera. I can still get 127 film locally, you can order it too. I scan the film myself. If you used a stereo Holga or a 35mm Stereo Realist, you could likely have the lab scan them for you. I have also used a pair of digital SLRs with matching 28mm lenses, which avoids having to scan the film.

    To convert the individual images into a proper "Holmes" card (the Victorian stereo views format that I prefer) I use computer software. It's called StereoPhoto Maker, and it's free. With the software, I can generate high resolution .JPG of the finished Holmes card. I take it to the local photolab and have it printed out on 5x7, trim the top and bottom a bit, and have a very professional looking result. They work great in the classic stereograph viewers. Of course, black and white works just as well as colour, because the process is digital.
    My other camera is a Pentax

  5. #5

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    I have also considered using a Fuji passport camera -- the kind that takes FP100 instant film. They are by default a stereo camera, as they take two images side-by-side with two lenses. The drawback is the focal length -- they are intended for portraits, not scenics. I'm sure the resulting instant print could be split, trimmed and mounted on 4x7 card stock for use in a Holmes viewer.
    My other camera is a Pentax

  6. #6

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    One final thought... you could probably make a nice optical stereo print by shooting 35mm in a Stereo Realist, and enlarging it on a medium-format (6x7 or 6x9) enlarger.
    My other camera is a Pentax

  7. #7

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    Quote Originally Posted by steven_e007 View Post
    I'd love to have a test on a synoptophor but alas, in the UK opticians are private practices primarily concerned with making spectacles and screening for problems. As soon as they find a convergence problem it would be off to see an optometrist (don't know if this is the same wherever you come from?) under the control of the National Health Service. Since I am only interested in my eyesite and do not have a real problem I couldn't expect to, and wouldn't be, refered to an optometrist to be tested. I could probably pay for a private consultation, but I'm sure that would be serious money - and I'm not that interested!
    You can just come to Poland, here you would pay not more than 30 GBP for that kind of service. I think the trick would work with every country which is futher away in east direction than Germany...

    Quote Originally Posted by steven_e007 View Post
    I was hoping to do things properly with some polaroid filters on my camera and under my enlarger
    That's not it, film does not "see" polariation of light. You need a stereo camera, which records two normal images from slightly different positions/angles, and then the images would be *projected* through polaroid filters and watched with polaroid filters. So basically you need a stereo camera, projector and two sets of filters.

  8. #8

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    there have been stereo cameras around since photography was born.
    i don't think it would be hard to find a stereo-opticon and some "vintage" stereo cards
    through a store, or ebay ..

    http://www.stereoscopy.com/
    http://www.berezin.com/

    sell the equipment to make your own too

    it isn't hard, even with a normal camera. you just need create a bracket to allow your camera to slide over 4-6" .
    take 2 images of the same view. there are oodles of 120 format stereo cameras, some expensive, some
    are like box cameras. the lomo/sputnik ones from what i have read suffer from light leaks
    holga makes a stereo camera that about 70$ usd as well.

    this person has a great collection!

    http://www.ignomini.com/photographica/3dcameras1.html

    good luck!
    john
    Last edited by jnanian; 03-05-2010 at 08:15 PM. Click to view previous post history. Reason: have no idea how to spell stereo opticon

  9. #9

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    There are several on f295 making stereo images with pinhole cameras.
    Heavily sedated for your protection.

  10. #10
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    I've got a Stereo Realist. A fellow APUG member twisted my arm to get one. They seem to be built to last, and mine works like a peach. There are places on the internet that supply the slide mounts and viewers, so it's very much alive. I shoot colour transparency, but you could load up with B&W and reverse process it. That is, bleach after development but before fix, then re-expose, develop, and fix. Then cut.

    John mentioned a slider bracket. Just one limitation on that is the scene can't be changing between exposures. I like the stereo camera because I take street photographs with lots of things going on. They are a total treat.
    Considerably AWOL at the present time...

    Archive/Blog: http://davidwilliamwhite.blogspot.com

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