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I am having problems with Stack Merge ... showing what appeared to be alignment problems but it looks more like ‘leakage’ through upper layers.  I’m using 6 image from a tripod at varied distances ... at f2.8.  (NOTE: A one-shot F16 captures fine, shown below, without the leakage.). Here are comparable images ... look for the leaf leakage in the second shot, in the black vertical rail posts, with background leafs showing through.  What’s happening here?  How to correct it?  Program bug or me?  This is on an iPad Pro with iOS 12.2.  Thanks. 

 

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Hi Jim Radford,

Its hard to say exactly what the issue might be without seeing the files in question of possible could you provide them?

Thanks

Callum

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I’m going to call off the search for answers.  Just leave it as an example of an idea gone awry.  I now don’t see this as a problem with Affinity, considering PS and Helicon had similar issues ... due to the somewhat unique composition of this practice picture shot at f2.8 per frame.  The way around this:  1) shoot for hyperfocal full range detail in one shot, as per the top image here, or 2) be prepared to re-touch the (six) see-through masks, provided in Helicon Focus, or PS or possibly Affinity.  That’s a slow process, with some pixel-level accuracy, but it works.  I don’t think this is anything but operator ‘error’ in automated expectations and sloppy workflow, not the program per se. The optics (at F2.8) undoubtedly contributed to the show-through at the complex fringes of near/far objects, like the table and the black railing posts.  But of course that is the nature of focus stacking — just maybe not at this wide aperture extreme.  Had there been just a foreground rock or other solid object, I doubt it would so noticeable, and far easier to retouch, if at all.  I did correct it in Helicon as the focus stacking method, even at f2.8, seems to out-outperform the hyperfocal (f16) approach for this purpose.  And I suspect, this might require 2-3 times more slices for better accuracy.  Just my post-assessment. Other ideas welcome.  Thax for looking.

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