Digital photography with flatbedscanner

Discussion in 'Scanners' started by Vincent de Groot, Jun 15, 2006.

  1. Vincent de Groot, Jun 15, 2006
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  2. Vincent de Groot

    Dmac Guest

    I'll give out a few previously not published "secrets" now.
    Flat bed scanners are basically like hugely expensive scanning back
    digital cameras. One fellow I know has been using one on a "copy camera"
    for years to photograph paintings for reproduction as canvas prints.

    When ever I find one of the monolithic vertical cameras like he uses,
    I'll be doing the same. Until then I use a 5D for the job and only get
    "nearly as good" as his stuff.

    I discovered about 5 years ago that the best way to "photograph"
    jewelery was to use a flat bed scanner to do the image capture. The
    Jeweler I did the catalogue for remarked they were the best pictures of
    his work he had ever had done.

    The images from a FB scanner are "first generation" stuff and are likely
    to be way better than anything done with an anti-alias filter. Depth of
    field is the killer!

    Great example, congratulations and yes, they are photographs... Digital
    ones at that!
    Dmac, Jun 16, 2006
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  3. Vincent de Groot

    Lobby Dosser Guest

    Yes! Great article! I will soon have a surplus scanner that I was going to
    give away. Now I'm looking for a lens on ebay.
    Lobby Dosser, Jun 16, 2006
  4. It's hell to use for capturing BB however, or footers, or footie, or
    football, either bank of Atlantic....

    Lights can also be inserted for special effects.
    John McWilliams, Jun 16, 2006
  5. Hi Wayne,
    I will be happy so see that link,

    Vincent de Groot, Jun 16, 2006
  6. Oh, it's great for portraits; really dramatic light fall off, great
    shadows, incredible detail such as seeing *into* pores.... And the age
    old copier at the office loses out when used for the, uh, other cheeks.
    John McWilliams, Jun 16, 2006
  7. Vincent de Groot

    Tim Guest

    Can someone enlighten an idiot please :)

    How do you set a scanner up as a camera?
    Do you need to set up a bellows type rig with a glass plate to focus and
    then swop that out for the scanner or are there neater tricks?


    Tim, Jun 16, 2006
  8. Vincent de Groot

    Tim Guest

    Ok, you could have read the articles quoted :) but here goes:
    Hi Wayne

    Interesting site, thanks for the link

    Sorry I didn't write the question very well

    I'm up to speed on the scanning/imaging side of things and have had a play
    with it in the past

    I was hoping for a bit more info on your point 2 below, things like the rig
    set up, are there any tips and tricks, focusing/exposure tips etc
    Are you stuck with setting up a view camera set up or can you do fun things
    with a pin hole box strapped to the front of the scanner etc

    Thanks for any hints

    Tim, Jun 17, 2006
  9. Good points; sounds like you have more fun with scanners than most...

    Wayne, I wonder if you have tried Mozilla for news. You might like it
    way better than Google. Using a news reader has a lot of advantages. I
    am assuming your ISP offers a news feed, of course; perhaps I shouldn't.
    I happen to use Thunderbird for News, and as a back up mail client.
    John McWilliams, Jun 17, 2006
  10. One problem with the LiDE scanners is their incredibly shallow depth of
    field. Regular flatbed scanners have a small CCD, perhaps an inch long,
    and use a lens to image the full width of the paper (usually 8.5 inches)
    onto that. The light path is folded a couple of times for compactness
    of the scanning head, but the light travels about a foot from paper to
    the lens. All this means that there's a reasonable DOF, on the order of
    several mm at least, above the scanner glass on a regular scanner.

    But the LiDE scanners use a sensor that is 8.5 inches long. Instead of
    a single lens, they use an array of thousands of little lenslike things
    arranged in what looks like a black plastic bar to image the paper
    surface onto the sensor. The optics are working at 1:1, and the object
    and image distance is maybe 1 cm or less. So the DOF is very small, and
    anything that's not right on the glass is out of focus.

    (It's really an interesting optical system. I suspect the "lenses" are
    really GRIN lenses, pieces of specially-made fiber optics that can focus
    images. The image produced has to be *right way around*, not inverted
    like a normal single lens image, in order for the thousands of
    overlapping little images to produce one seamless single image on the

    Dave Martindale, Jun 19, 2006
  11. Hi Dave,

    That is true. But hey, you can't have everything :)

    Seriously, it is all a tradeoff. I like the LiDEs because I can use them
    with a laptop away from power.


    Wayne J. Cosshall, Jun 19, 2006
  12. I haven't tried that, but I do use a LiDE unit as my main scanner
    connected to a desktop computer. It takes up far less desk space. I
    use it for all paper and photo print scanning I do.

    But when I want to get the best possible image of something that won't
    lie flat on the glass, it's time to think about getting out the old
    clunker big-box scanner.

    Dave Martindale, Jun 19, 2006
  13. When, if and as I get a new scanner, I will seriously consider the Canon.

    W- Nice looking news client you got there! With T-Bird, hit K and the
    whole thread disappears, forever. A thread that's tiresome but may be
    revived, hit R and it'll be marked Read for that session. The way I read
    is by (in the menu bar) View -> Threaded-> Threads with Unread, and then
    scroll through each via the spacebar. There are dozens of other ways to
    navigate through, depends on preferences.
    John McWilliams, Jun 19, 2006
  14. Hi John,

    Thanks. Yes, I've switch to Thunderbird and love it. Thanks for the tip.
    Makes life much easier.


    Wayne J. Cosshall, Jun 20, 2006
  15. Agreed. And that's how I use one for normal scanning, semi-vertical.
    Works great.


    Wayne J. Cosshall, Jun 20, 2006
  16. Vincent de Groot

    Walter Banks Guest

    A wooden box and a surplus copier lens (They are actually quite good and cost maybe $10) a laptop and a cannon scanner and you too can be an Ansel Adams. It is a serious comment high resolution wide angle photography. almost makes one want to spend a $100
    and a workshop afternoon creating a modern version of a big format camera.

    Many years ago big groups were arranged in a semi circle with a camera that moved film as it rotated to image the group as one long narrow image a feat for the modern day scanner camera might also do.

    Walter Banks, Jun 20, 2006
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