I'm not experienced enough yet with focus stacking to comment based on
personal experience but I have heard (and believe that it should be so)
that when doing macro it is best to move the entire camera and lens
combo for refocusing. The reason is that refocusing by altering the
distance between lens and image plane changes the magnification even if
only slightly. That, of course, gives the stacking software fits and
may be the cause of some of my failures trying to use CombineZ. But
perhaps PS's image alignment capability between layers can resolve that
problem or at least minimize it. In any case I still think that moving
the camera when up really close should deliver better results.
Chuck Norcutt
WayneS wrote:
> At 06:14 AM 10/30/2008, ...Wayne wrote:
>>> ... two images (first images I came across in my files). One was
>>> focused on the back petals, the other on the stamina, shot at
>>> F13. There is no way I could get this kind of DOF with just F stops.
>>>
>>> http://www.zuik.net/5D/flower_focus_blend.jpg
>>>
>> Very impressive.
>>
>> How did you change the focus point, move the camera & lens or refocus the
>> lens ?
>
> Just adjust focus point on the lens. Here is a guide and some more examples.
>
> http://www.dimagemaker.com/article.php?articleID=1483
>
> The merging is part of the blending of stacked layers. I'm curious now about
> other possible blending besides just focus points. I've been wanting to do
> this for years. I think I even proposed the idea on this list before helicon
> software or PS implemented it.
>
> This will change the way I think about macros now, no longer locked in
> to framing dictated by plane of focus. And the possibility to use the sweet
> F-stop of the lens.
>
> The fact the lens is internal focus, and hence changes focal length with
> focus,
> seems to be managed by the auto-align step, as seen in the third example I
> presented.
>
> WayneS - addicted to the adobe update wagon
>
>
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