Focus stacking is a digital process by which multiple images (of the same composition) are combined by selecting the sharpest section of each picture. The goal of the process is to get an image that is sharp at both close and long range.

Why not shoot with a small aperture?

While it is possible to achieve similar result using a small aperture (ex: f/32+), doing so produces diffraction which reduces image quality. To maximize image quality, it is preferable to shoot at the lens sharpest aperture (generally around f/5.6 – 8) and stack the images.

How to create stacked images?

Here is a list of the most popular software to do focus stacking:

I have not found any good and easy to use free alternative. Anyone knows of any?

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