Zerene Stacker is described as 'Is “focus stacking” software designed specifically for challenging macro subjects and discerning photographers. Of course it works great with simpler subjects, close-ups, and landscapes also!' and is an app. There are four alternatives to Zerene Stacker for Windows, Linux and Mac. The best Zerene Stacker alternative is Enblend/Enfuse, which is both free and Open Source. Other great apps like Zerene Stacker are DSLR Bracketeer, Helicon Focus and CombineZP.
Enblend combines images that overlap into a single large image with no seams. Enfuse combines images that overlap into a single image with good exposure and good focus.
DSLR Bracketeer is a simple program for automatic focus bracketing on Canon EOS DSLR cameras. It is used for macro photography mostly.
Helicon Focus is an image editing software that creates one completely focused image from several partially focused images by combining the focused areas. The program is designed for macrophotography, microphotography and landscape photography when sharpness from zero to...
I have tried both Helicon and Zerene for moth photography. I found Zerene gave me best results.
CombineZ is a computer program which runs on the newer versions of the Windows operating system. It is designed to process Stacks of digital images. What is a Stack in this sense? It is a set of pictures all of which have the same dimensions i.e.
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Enblend/enfuse does not do focus stacking