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[OM] Re: Focus stacking

Subject: [OM] Re: Focus stacking
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Wed, 30 Apr 2008 19:30:39 -0400
 From the files section download the help file and the combineZM.msi 
Windows installation package.

Chuck Norcutt

Chuck Norcutt wrote:
> It's not the way I first got the app but apparently today you have to 
> join this Yahoo group <http://tech.groups.yahoo.com/group/combinez/> and 
> download the files from the group's files section.  I just noticed 
> there's a later version available.
> 
> Chuck Norcutt
> 
> Rand E wrote:
>> Chuck,
>>    Would you post the URL where CombineZM can be had.
>> Thanks,
>> Rand E.
>>
>>
>> Chuck Norcutt wrote:
>>> Quite some time ago I downloaded some free software that does image 
>>> stacking ("CombineZM" by Alan Hadley) but never tried to use or study 
>>> it.  CombineZM can be used to stack images for improved depth of field, 
>>> add exposures (as in astrowork), increase dynamic range, etc. (yes, 
>>> there's more)
>>>
>>> Today I noticed the beautiful blossoms on a crabapple tree so snipped 
>>> off a small branch and setup indoors to take a series of shots with a 
>>> Viv Series 1 90/2.5 macro intending to get all of the blossoms in focus 
>>> across the full width of the branch.  I ended up with a set of 7 frames 
>>> each focused about an inch apart.  I started to peruse the instructions 
>>> which seemed rather daunting so decided simply to press ahead and see if 
>>> I could find the automated procedures.  I did but they made a perfect 
>>> mess of the result.
>>>
>>> First, I knew that changes in focus were going to cause slight 
>>> differences in magnification.  But I was surprised to see just how much 
>>> the magnification does change.  Across the full 7 frames the image 
>>> shrank about 3-4%.  When I directed the software to do it's thing I 
>>> ended up with a series of overlaid images all of slightly different 
>>> size.  Not what I expected.  I guess I may be forced to read the 
>>> instructions to figure out how to resize the images for a precise overlay.
>>>
>>> Finally, and I don't know how I'm going to defeat this part, I noticed 
>>> that over the 7 minutes I took to take the 7 shots that several blossoms 
>>> visibly wilted during the session and sagged on their stems by roughly 
>>> their own full width in the 7 minute session.  Guess I'm going to have 
>>> to get faster.
>>>
>>> Anyhow, anyone have any experience in doing this sort of thing.  Any advice?
>>>
>>> Thanks,
>>> Chuck Norcutt
>>>
>>> ==============================================
>>> List usage info:     http://www.zuikoholic.com
>>> List nannies:        olympusadmin@xxxxxxxxxx
>>> ==============================================
>>>
>>>
>> ==============================================
>> List usage info:     http://www.zuikoholic.com
>> List nannies:        olympusadmin@xxxxxxxxxx
>> ==============================================
>>
>>
>>
> 
> ==============================================
> List usage info:     http://www.zuikoholic.com
> List nannies:        olympusadmin@xxxxxxxxxx
> ==============================================
> 
> 
> 

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