Anyone have a proven DOF stacker script for A560? - General Help and Assistance on using CHDK stable releases - CHDK Forum
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Anyone have a proven DOF stacker script for A560?

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Offline Bob Edwards

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Anyone have a proven DOF stacker script for A560?
« on: 13 / July / 2008, 03:46:18 »
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I've tried scripts from the Wiki and written a few myself, but haven't been able to persuade my autofocussing A560 to do a DOF stack. (This camera doesn't have manual focus out of the box) Anyone out there who has a script that they know works on an A560? I'd like to do some macro work.

You might mention which CHDK version you've successfully run the DOF stack script on.

I have EV stacking running OK, presently on CHDK 0-439.

Am presently writing a windows help file (chm) for CHDK scripting, so will post that when it's done.

Cheers, Bob
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Offline Microfunguy

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Re: Anyone have a proven DOF stacker script for A560?
« Reply #1 on: 13 / July / 2008, 05:12:41 »
Quote from: Bob Edwards on 13 / July / 2008, 03:46:18
Anyone out there who has a script that they know works on an A560?

Bob, you do not need a script.

Read this page for 'StereoData Maker' :- SDM Gridr

Download SDM 1.72 and use the supplied installer to prepare a bootable card.

In Canon Function menu, select Custom Timer shooting mode and select required number of shots.

In SDM, select the focus distance bracket value.

No need to specify bracketing type, it is always outwards.

Auto-focus on nearest part of subject and press the button.

Let us know if it works.


David
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Offline LjL

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Re: Anyone have a proven DOF stacker script for A560?
« Reply #2 on: 13 / July / 2008, 08:22:09 »
Well, there are scripts around, however, which are more "failsafe" than that, as they make sure that the composite DOF will actually cover the whole requested range. In other words, you won't risk having parts of the subject that are out-of-focus in every exposure.

This advanced script, for instance, implements this feature.
It will also stop shooting when hyperfocal distance is reached, and sweeties like that.

If you prefer to write your own script or do the maths in your head, a rule of thumb that can be used is that if the far end of your current DOF is X, then focusing to X will still keep the previous in focus (at the near end of the DOF). It's not a mathematically hard rule as far as I know, mind, it just tends to work out ok IME.
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