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CombineZM

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    CombineZM
    « on: 16 / May / 2008, 10:21:16 »
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    Why CombineZM has made this ugly result ?
    I can send the original photos. x-giorgio-x @ hotmail.com


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    Re: CombineZM
    « Reply #1 on: 16 / May / 2008, 11:56:07 »
    DOF stacking was not set properly, and/or too many/too few photos.
    What were your parameters in the focus settings, and how many shots did you combine?

    What I do with such macros is set the focus depth increment to 2mm, set it to "+" bracketing, set into continuous mode, set the focus lock at the closest I can, set EV lock, and fire away.
    I take many dozens of shots on the tripod.
    When I load them all, I clear out the ones at the beginning of the string of shots (usually none need to go) and any shots after the last good focused part of the object.
    From there, I may be left still with 3 dozen shots. I then delete the last two photos in every three shots.
    In other words, pictures numbered
    xx25,
    xx26,
    xx27,
    xx28,
    xx29,
    xx30,
    xx31,
    xx32,
    xx33,
    xx34,
    xx35,
    xx36,
    xx37,
    xx38,
    xx39,
    xx40...

    becomes a list of...

    xx25,
    xx28,
    xx31,
    xx34,
    xx37,
    xx40
    ...and so on. I do this because I can slim down the shots better if I can actually see the finished results. What I find is that the closer the focus is to the lens, the more narrow the width of what is actually in focus. You will see this, too, with only a few shots worth of practice.
    Then you will simply hand pick the shots you wish to combine.

    Combining too many shots creates what i refer to a "digital anomalies"; some sort of strange blotches and lighting that effects the sharpest highlights and the edges of the photo. I nearly always find it necessary to crop the outside edge of a photo. Once you learn that, you can plan for it during composition.

    Here's a composition I made a few days ago. The idea was to include the landscape at infinity. This was whittled down in the way I described from 48 shots to 16.
    Whoa-Hey! Careful where you point that thing. You're gonna shoot someone!

    http://chdk.wikia.com/wiki/DoF_Stacking

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    Offline jetzt

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    Re: CombineZM
    « Reply #2 on: 17 / May / 2008, 09:27:18 »
    Wow, really good explanation, maybe we can make a (small) tutorial out of that for the wiki?

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    Re: CombineZM
    « Reply #3 on: 20 / May / 2008, 18:28:30 »
    Sure. Seeing as how I am very much a novice at this, maybe others can add some suggestions here in this thread? Then I'll go ahead and transcribe it to the wiki.

    Where can I put photos so they stay on the wiki? I would be inclined to make this one smaller, and add a couple more to demonstrate other uses (super-macro, micr, etc.).
    Whoa-Hey! Careful where you point that thing. You're gonna shoot someone!

    http://chdk.wikia.com/wiki/DoF_Stacking


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    Re: CombineZM
    « Reply #4 on: 08 / June / 2008, 15:17:06 »
    Well, here's what I have for the tutorial on DoF Stacking so far. (Links and images are not filled in yet.)
    http://chdk.wikia.com/wiki/User:Psychokitty#.22DoF_Stacking.22_using_CHDK_DoF_Bracketing_.26_CombineZM
    Whoa-Hey! Careful where you point that thing. You're gonna shoot someone!

    http://chdk.wikia.com/wiki/DoF_Stacking

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    Offline fbonomi

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    Re: CombineZM
    « Reply #5 on: 08 / June / 2008, 15:31:17 »
    Psychokitty, thanks!

    I always wanted to play with that, but could not find the time to study it properly...

    Now I can be lazy and follow your tutoriai :-)

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    Offline fe50

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    Re: CombineZM
    « Reply #6 on: 08 / June / 2008, 17:33:04 »
    Psychokitty, good stuff !