TAKO. INTERNET SEIT 1996.
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Re: [OM] Dude - Who stole my 0.56ms?

Subject: Re: [OM] Dude - Who stole my 0.56ms?
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Sat, 10 Apr 2010 07:20:33 -0400
Google "CombineZ" for the free stuff.  There is also a commercial app 
but I've forgotten its name.

Chuck Norcutt

Moose wrote:
> On 4/9/2010 4:17 PM, Jim Nichols wrote:
>> Moose,
>>
>> The thing that confounds me, with macro lenses, and I should have expected 
>> this from the start, is that as one moves in closer to the subject, the DOF 
>> decreases to a ridiculous point.
> 
> It's just "do the math" physics. There are some new and very different 
> imaging concepts being worked on that may change DOF possibilities, but 
> as long as we stick to simple refraction based lenses, the rules are fixed.
> 
>> My Leica Elmarit-R 60/2.8 Macro lens requires stopping down to a minimum 
>> opening in order to get the full subject in focus.  I'm sure this is fine 
>> for flat subjects, but just doesn't work out for me, particularly with 
>> flowers.
>>    
> 
> One relatively recent change is DOF stacking software. You take a series 
> of shots with the plane of focus moved in small increments. The software 
> merges the sharp parts. I've been meaning to try that, but have by now 
> forgotten the names of the apps. I do have a handful of sets of images 
> that may work.
> 
> I think one trick is to use a focusing rail, rather than refocusing the 
> lens. That way, he in focus part of each 'slice' is the same 
> magnification, so there is less size matching for the software to do.
> 
> Moose
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