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Thread: How do they stack photos for more DOF?

  1. #1

    Default How do they stack photos for more DOF?

    They are using stacking for DOF if I am not wrong.
    Are there any tutorials to do that?

    http://www.naturephotosociety.org.sg...ID14/4238.html

  2. #2

    Default Re: How do they stack photos for more DOF?

    Hi dRebelXT,

    Yes, it is to increase the DOF in macro photography. There is a writeup on this at the link below:
    http://www.janrik.net/insects/Extend...2005summer.htm

    Hope this helps!

  3. #3

    Default Re: How do they stack photos for more DOF?

    Quote Originally Posted by b2973 View Post
    Hi dRebelXT,

    Yes, it is to increase the DOF in macro photography. There is a writeup on this at the link below:
    http://www.janrik.net/insects/Extend...2005summer.htm

    Hope this helps!
    yeah, tried CombineZ last weekend..
    incredible tool it is! When I adjust focus little by little the perspective changes but
    the tool can actually recognize that.

  4. #4

    Default Re: How do they stack photos for more DOF?

    Quote Originally Posted by dRebelXT View Post
    They are using stacking for DOF if I am not wrong.
    Are there any tutorials to do that?

    http://www.naturephotosociety.org.sg...ID14/4238.html
    The dragonflies? Looks more like small aperture and using flash.. Don't think you need to do stacking for dragonflies. Stacking more for microscope photography where the DoF is super thin. Some software can actually adjust the focus of microscopes and take images at different focus then stack them.

    Stacking works well only if you use them on inanimate objects. What the software does is that it looks for the sharpest portions of the images and then stitch them together.

  5. #5
    Senior Member Leong23's Avatar
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    Default Re: How do they stack photos for more DOF?

    Aiyo...why use my posting on other forum.

    For normal DF shots, stacking is not neccesary, of course there are reason behind those.

    Stacking is useful for thick/fat subject at high magnification.

    example



    PM me if you need help/advise.

  6. #6

    Default Re: How do they stack photos for more DOF?

    Quote Originally Posted by Leong23 View Post
    Aiyo...why use my posting on other forum.

    For normal DF shots, stacking is not neccesary, of course there are reason behind those.

    Stacking is useful for thick/fat subject at high magnification.

    example

    [ IMG]http://farm3.static.flickr.com/2337/2345972120_f6bea4307f_o.jpg[/ IMG]

    PM me if you need help/advise.
    Sorry Leong23 for your photos.. but they are great..

    Do you take multiple shots when the surrounding is still? I often found it a problem
    when there is wind, even compose/focus.

  7. #7
    Senior Member Leong23's Avatar
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    Default Re: How do they stack photos for more DOF?

    everything must be still, slight movement can ruin the whole effort.

  8. #8

    Default Re: How do they stack photos for more DOF?

    Ok, my first outdoor with Combinez..
    I used F/3.2 to save background but i bet I need a few more shots.


  9. #9

    Default Re: How do they stack photos for more DOF?

    Quote Originally Posted by Leong23 View Post
    everything must be still, slight movement can ruin the whole effort.
    Mount the camera still on a sturdy tripod, set to continuous firing mode and fire away while turning the focusing ring..

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    Default Re: How do they stack photos for more DOF?

    Quote Originally Posted by lsisaxon View Post
    Mount the camera still on a sturdy tripod, set to continuous firing mode and fire away while turning the focusing ring..
    Nice thought but that will not work. MLU will most prob be used and firing on continuous will be a no-no. And most competent macro shooters are more precise in that they will really want to make sure their focusing is spot-on and the air is static before firing off.

  11. #11
    Senior Member Leong23's Avatar
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    Default Re: How do they stack photos for more DOF?

    Quote Originally Posted by lsisaxon View Post
    Mount the camera still on a sturdy tripod, set to continuous firing mode and fire away while turning the focusing ring..
    Actually this method had cross my mind before, will try it if the light is good for higher shutter speed.

  12. #12

    Default Re: How do they stack photos for more DOF?

    Quote Originally Posted by ywh View Post
    Nice thought but that will not work. MLU will most prob be used and firing on continuous will be a no-no. And most competent macro shooters are more precise in that they will really want to make sure their focusing is spot-on and the air is static before firing off.
    Haha.. okie.. I forgot high magnification is involved. Oh one more thing, I just remembered that it may not work if you turn the focusing ring because magnification changes. Need to use a rail, fix the focus and adjust the distance instead.

  13. #13

    Default Re: How do they stack photos for more DOF?

    Quote Originally Posted by lsisaxon View Post
    Haha.. okie.. I forgot high magnification is involved. Oh one more thing, I just remembered that it may not work if you turn the focusing ring because magnification changes. Need to use a rail, fix the focus and adjust the distance instead.
    last time i felt the tripod is ok but the subject swaying in wind is a bigger problem..
    plus, focus ring can be very sensitive when it comes to high mag ratio, slight
    move and it's totally OOF.

    Maybe we should shoot video at 30 fps on a rail then try to combine large number
    of frames.

  14. #14

    Default Re: How do they stack photos for more DOF?

    Quote Originally Posted by dRebelXT View Post
    last time i felt the tripod is ok but the subject swaying in wind is a bigger problem..
    plus, focus ring can be very sensitive when it comes to high mag ratio, slight
    move and it's totally OOF.

    Maybe we should shoot video at 30 fps on a rail then try to combine large number
    of frames.
    That's what they do on microscopes. They use CCD cameras and capture say 5fps while stepping through the focus and they stack the images.

  15. #15

    Default Re: How do they stack photos for more DOF?

    Quote Originally Posted by lsisaxon View Post
    That's what they do on microscopes. They use CCD cameras and capture say 5fps while stepping through the focus and they stack the images.
    Then is it possible to hack the firmware of DSLR and write some programs
    to AF the lens within a short range then take multiple shots automatically?

  16. #16
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    Default Re: How do they stack photos for more DOF?

    Quote Originally Posted by lsisaxon View Post
    That's what they do on microscopes. They use CCD cameras and capture say 5fps while stepping through the focus and they stack the images.
    do you think the dslr multiple exposure mode helps? :P
    chezburgr i can haz?

  17. #17

    Default Re: How do they stack photos for more DOF?

    Quote Originally Posted by psychobiologist View Post
    do you think the dslr multiple exposure mode helps? :P
    Don't think so leh.. multiple exposure shoots everything and combine into one file? The microscope software uses an algorithm similar to CombineZ to extract the sharpest portion of each image to stitch together.

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